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Introduction
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WiFi and MQTT by Firmware Type
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SX1262 channel-scanning hardware results
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Carrier-wave RF checks
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CW and CW2 validation
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CLI Availability by Firmware Build
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CLI Command Availability Matrix
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CLI Commands
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CLI setting dispatch audit
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Full Companion contact caches
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Contact-cache and NimBLE RAM qualification
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</a>
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Companion Offline Message Queue
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Companion Protocol
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Full Companion
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../companion_usb_ascii_validation/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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USB Companion ASCII default validation
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../companion_usb_client_validation/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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USB Companion client compatibility
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../docs/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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Local Documentation
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../double_frequency_v4_validation/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
|
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Double center-frequency write: V4 transmitter / XIAO receiver
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../esp32_memory_budget/" class="md-nav__link">
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|
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<span class="md-ellipsis">
|
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|
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|
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Classic ESP32 image memory budget
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../espnow_bridge_setup/" class="md-nav__link">
|
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|
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|
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<span class="md-ellipsis">
|
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ESP-NOW bridge: simple setup
|
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</span>
|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../faq/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
|
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|
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Frequently Asked Questions
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../filter_tool/" class="md-nav__link">
|
|
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|
|
|
|
|
<span class="md-ellipsis">
|
|
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|
|
Filter policy playground
|
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|
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</span>
|
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|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../firmware_memory_budget/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Firmware memory checks
|
|
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|
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|
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</span>
|
|
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|
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|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../firmware_picker/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Firmware picker
|
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|
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</span>
|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../flood_filtering/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Flood Filtering and Moderation
|
|
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|
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</span>
|
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|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../four_fixed_tx_dwell_validation/" class="md-nav__link">
|
|
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|
|
|
|
|
<span class="md-ellipsis">
|
|
|
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|
|
Four fixed transmitters: longer dwell repeats
|
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|
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</span>
|
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|
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</a>
|
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</li>
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<li class="md-nav__item">
|
|
<a href="../four_fixed_tx_single_pass_validation/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Four fixed transmitters / fast single-pass receiver
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
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</li>
|
|
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|
|
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|
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<li class="md-nav__item">
|
|
<a href="../full_companion_features/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Full Companion: turn features on and off
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../full_companion_usb_switcher/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Companion USB CLI and binary switcher
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../full_usb_logging_validation/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Full USB logging repair — 1.17.1.6
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
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|
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|
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<li class="md-nav__item">
|
|
<a href="../gps_tracking/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
GPS Tracking
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../halo_keymind_settings/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Halo and Keymind Branch Settings
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
|
|
|
|
|
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|
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|
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|
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../hardware_validation_bluetooth_stealth_2026-09-07/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
XIAO Bluetooth stealth hardware validation - 2026-09-07
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
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|
|
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|
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|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../hardware_validation_checklist/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Hardware validation checklist
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../home_text_spacing/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Home-screen text spacing
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
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<li class="md-nav__item">
|
|
<a href="../host_cli_service/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
LoRa CLI Host Service
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
|
|
|
|
|
|
|
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|
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|
|
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<li class="md-nav__item">
|
|
<a href="../kiss_modem_protocol/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
MeshCore KISS Modem Protocol
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../lora_ota_automation/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Scripted LoRa OTA from start to finish
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../mbedtls-tls-footprint/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Shrinking the per-connection TLS footprint on non-PSRAM observers
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../mixed_scan_validation/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Mixed-bandwidth two-channel reception test
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../mixed_sf_bw_validation/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Equal-symbol-time mixed SF/BW, four-channel test
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../nimble_companion_trial/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
ESP32-S3 NimBLE Full Companion trial
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="md-nav__item">
|
|
<a href="../nimble_companion_trial_results/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
ESP32-S3 NimBLE trial results, 2026-09-08
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../nrf52-usb-ready-fix/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
nRF52 USB READY hang
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../nrf52_companion_storage_recovery/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
nRF52 Companion automatic ExtraFS recovery
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../nrf52_power_management/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
nRF52 Power Management
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../number_allocations/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Number Allocations
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
|
|
|
|
|
|
|
|
|
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|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../ota_easy/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
Easy firmware updates over LoRa
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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|
|
|
|
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|
|
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|
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|
|
|
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|
|
<li class="md-nav__item">
|
|
<a href="../ota_meshtower_v2_sdcard/" class="md-nav__link">
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
|
|
|
MeshTower V2 microSD LoRa OTA
|
|
|
|
|
|
|
|
</span>
|
|
|
|
|
|
|
|
</a>
|
|
</li>
|
|
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<li class="md-nav__item">
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<a href="../ota_nrf52_bootloader_update/" class="md-nav__link">
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<span class="md-ellipsis">
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nRF52 bootloader updates over LoRa
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../ota_nrf52_qspi/" class="md-nav__link">
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<span class="md-ellipsis">
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nRF52 repeater LoRa OTA with external QSPI
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../ota_protocol/" class="md-nav__link">
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<span class="md-ellipsis">
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MeshCore OTA - .mota container & LoRa protocol
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../ota_user_guide/" class="md-nav__link">
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<span class="md-ellipsis">
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Updating your node over the air (OTA) - user guide
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../packet_format/" class="md-nav__link">
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<span class="md-ellipsis">
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Packet Format
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../pair_4p6_300us_validation/" class="md-nav__link">
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<span class="md-ellipsis">
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SF7/62.5 + SF8/500: 4.6 slow chirps, 0.3 ms reserve
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../pair_preamble32_validation/" class="md-nav__link">
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<span class="md-ellipsis">
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SF7/62.5 + SF8/500, fast switching and preamble 32
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../payloads/" class="md-nav__link">
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<span class="md-ellipsis">
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Payload Format
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../pr7_review_validation/" class="md-nav__link">
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<span class="md-ellipsis">
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PR #7 review and validation
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../preamble_detection_investigation/" class="md-nav__link">
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<span class="md-ellipsis">
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Off-channel preamble investigation
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../qr_codes/" class="md-nav__link">
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<span class="md-ellipsis">
|
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QR Codes
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../radio_chirp_math_validation/" class="md-nav__link">
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<span class="md-ellipsis">
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Shared radio/radio2 chirp timing and preamble warnings
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../radio_dwell_policy_validation/" class="md-nav__link">
|
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<span class="md-ellipsis">
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Automatic dwell policy: 4.6 chirps on both profiles
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../radio_profile_switch_validation/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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SX1262 profile-switch validation
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../radio_profiles/" class="md-nav__link">
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|
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<span class="md-ellipsis">
|
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Two LoRa profiles on one radio
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</span>
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</a>
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</li>
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<li class="md-nav__item md-nav__item--active">
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<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
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<label class="md-nav__link md-nav__link--active" for="__toc">
|
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<span class="md-ellipsis">
|
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|
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Dual-profile receive validation
|
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</span>
|
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<span class="md-nav__icon md-icon"></span>
|
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</label>
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<a href="./" class="md-nav__link md-nav__link--active">
|
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<span class="md-ellipsis">
|
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Dual-profile receive validation
|
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</span>
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</a>
|
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<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
|
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|
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<label class="md-nav__title" for="__toc">
|
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<span class="md-nav__icon md-icon"></span>
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Table of contents
|
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</label>
|
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<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
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|
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<li class="md-nav__item">
|
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<a href="#method-and-limits" class="md-nav__link">
|
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<span class="md-ellipsis">
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Method and limits
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</span>
|
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</a>
|
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</li>
|
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<li class="md-nav__item">
|
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<a href="#five-symbol-baseline" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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|
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Five-symbol baseline
|
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|
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</span>
|
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</a>
|
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|
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</li>
|
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|
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<li class="md-nav__item">
|
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<a href="#fractional-symbol-tuning" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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|
|
Fractional-symbol tuning
|
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|
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</span>
|
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</a>
|
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</li>
|
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<li class="md-nav__item">
|
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<a href="#shorter-fast-preambles" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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Shorter fast preambles
|
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|
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</span>
|
|
</a>
|
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</li>
|
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<li class="md-nav__item">
|
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<a href="#selected-bench-baseline-48-slow-symbols" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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|
|
Selected bench baseline: 4.8 slow symbols
|
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|
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</span>
|
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</a>
|
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</li>
|
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<li class="md-nav__item">
|
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<a href="#transmit-policy" class="md-nav__link">
|
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<span class="md-ellipsis">
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Transmit policy
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</span>
|
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</a>
|
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|
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</li>
|
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<li class="md-nav__item">
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<a href="#ota-discovery-while-retaining-the-main-channel" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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|
|
OTA discovery while retaining the main channel
|
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|
|
</span>
|
|
</a>
|
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|
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</li>
|
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|
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<li class="md-nav__item">
|
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<a href="#software-coverage" class="md-nav__link">
|
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<span class="md-ellipsis">
|
|
|
|
Software coverage
|
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|
|
</span>
|
|
</a>
|
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|
|
</li>
|
|
|
|
<li class="md-nav__item">
|
|
<a href="#hardware-restored-after-validation" class="md-nav__link">
|
|
<span class="md-ellipsis">
|
|
|
|
Hardware restored after validation
|
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|
|
</span>
|
|
</a>
|
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|
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</li>
|
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
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<a href="../radio_receive_calibration/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
|
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|
|
Radio receive calibration and recovery
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../rak3401_mota_chain/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
|
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|
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|
|
RAK3401 1W repeater compact LoRa update chain
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../role_feature_switches/" class="md-nav__link">
|
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|
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|
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|
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<span class="md-ellipsis">
|
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|
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|
|
Feature switches by role — 1.17.1.5 USA Cascade
|
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</span>
|
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</a>
|
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</li>
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<li class="md-nav__item">
|
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<a href="../s3_memory_soak_validation/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
|
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|
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|
|
ESP32-S3 OTA memory experiment
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../separated_radio_modulation_cache_validation/" class="md-nav__link">
|
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<span class="md-ellipsis">
|
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Separated radios, normal XIAO RX gain, and unchanged-modulation timing
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../sf10_10_vs_100hz_full_sample_validation/" class="md-nav__link">
|
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|
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|
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<span class="md-ellipsis">
|
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|
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SF10/125 full samples: 10 Hz versus 100 Hz first-pass detour
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../sf10_10hz_cr_detour_validation/" class="md-nav__link">
|
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|
|
<span class="md-ellipsis">
|
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SF10/125: tiny first-pass frequency offset and coding-rate detour
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</span>
|
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../sf10_full_retune_twice_validation/" class="md-nav__link">
|
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|
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|
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<span class="md-ellipsis">
|
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|
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|
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SF10/125: apply the full radio settings twice per hop
|
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</span>
|
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../sf10_nrf52_double_write_settling_validation/" class="md-nav__link">
|
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|
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<span class="md-ellipsis">
|
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|
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|
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SF10 / 125 kHz, XIAO nRF52 TX, double write, 1 ms delay grid
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</span>
|
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../sf10_rollback_failure_validation/" class="md-nav__link">
|
|
|
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|
|
<span class="md-ellipsis">
|
|
|
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|
|
SF10/125 rollback and wider-spacing failure isolation
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
|
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<a href="../sf125_settling_limits_validation/" class="md-nav__link">
|
|
|
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|
|
<span class="md-ellipsis">
|
|
|
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|
|
Descending SF10..SF5 / 125 kHz settling limits
|
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../sf5_250_dwell_validation/" class="md-nav__link">
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<span class="md-ellipsis">
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SF5 / 250 kHz: four-channel dwell sweep
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</span>
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</a>
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<a href="../sf6_125_settling_validation/" class="md-nav__link">
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<span class="md-ellipsis">
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SF6/125 four-channel post-switch settling sweep
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</span>
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</a>
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<a href="../sf6_5p1_trace_validation/" class="md-nav__link">
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<span class="md-ellipsis">
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SF6 / 125 kHz: four channels at 5.1 chirps
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</span>
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</a>
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<span class="md-ellipsis">
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SF6 / 125 kHz channel-count test
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</a>
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<span class="md-ellipsis">
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SF8 / 125 kHz: four-channel comparison at 5.1 chirps
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SPIFFS regular-file reads and login replay state
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</span>
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</a>
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Stats Binary Frame Structures
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Telemetry decoder
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Terminal Chat CLI
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Native USB backpressure and radio liveness
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Releases
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Markdown audit — 1.17.1.5 USA Cascade
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MeshCore 1.17.1.5 Dev - USA Cascade
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MeshCore 1.17.1.6 Dev - USA Cascade
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Method and limits
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Fractional-symbol tuning
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Shorter fast preambles
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Selected bench baseline: 4.8 slow symbols
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OTA discovery while retaining the main channel
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Software coverage
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Hardware restored after validation
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<article class="md-content__inner md-typeset">
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<a href="https://github.com/mikecarper/MeshCore/edit/keymindCascade/docs/radio_profiles_validation.md" title="Edit this page" class="md-content__button md-icon" rel="edit">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4zm10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1z"/></svg>
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</a>
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<h1 id="dual-profile-receive-validation">Dual-profile receive validation</h1>
|
|
<p>These measurements exercise the production two-profile implementation on one
|
|
SX1262 transceiver, using a Heltec V4 repeater as receiver and a XIAO ESP32-S3
|
|
with a Wio LoRa module as transmitter. They follow the dedicated
|
|
<a href="../mixed_scan_validation/">mixed-bandwidth scan experiment</a>.</p>
|
|
<p>Counts, diagnostic replies and firmware/source hashes are in
|
|
<a href="../tools/hil/radio_profiles_results.json">radio_profiles_results.json</a>.</p>
|
|
<p>The primary profile is 909.5 MHz, SF7, 62.5 kHz, CR 4/5, preamble 32.
|
|
The secondary is 910.5 MHz, 500 kHz, CR 4/5, with SF9, SF8 or SF7.
|
|
Scanning uses normal RX, starts with the slower profile, and reserves two slow
|
|
visits per slow preamble. Transmitters must use the corresponding preamble too.</p>
|
|
<h2 id="method-and-limits">Method and limits</h2>
|
|
<p>The transmitter sends MeshCore adverts at varied intervals. The receiver's
|
|
per-profile MeshCore RX counters are compared with the transmitter's completed
|
|
TX counters before and after each run. Initial OTA announcements can add packets
|
|
beyond the manually requested adverts; the table includes those transmissions.
|
|
These are aggregate counters, not sequence-matched payload captures.</p>
|
|
<p>Runs use one transmitting profile at a time and a strong signal. They do not
|
|
measure simultaneous traffic, weak-signal reception, interference or months of
|
|
uptime. A single transceiver remains unavailable to the other profile while
|
|
receiving or transmitting a packet. A clean finite run is evidence for a timing
|
|
choice, not a guarantee that it cannot drop packets.</p>
|
|
<h2 id="five-symbol-baseline">Five-symbol baseline</h2>
|
|
<p>Slow visits were 10.240 ms and fast visits 6.528 ms, plus actual switching time.
|
|
The longest observed profile switch was 4.416 ms; no switch failures were reported.</p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>Fast profile</th>
|
|
<th style="text-align: right;">Fast preamble</th>
|
|
<th style="text-align: right;">Fast RX / TX</th>
|
|
<th style="text-align: right;">Slow RX / TX</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>SF9 / 500</td>
|
|
<td style="text-align: right;">48</td>
|
|
<td style="text-align: right;">54 / 54</td>
|
|
<td style="text-align: right;">30 / 30</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">72</td>
|
|
<td style="text-align: right;">49 / 50</td>
|
|
<td style="text-align: right;">—</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">80</td>
|
|
<td style="text-align: right;">49 / 50</td>
|
|
<td style="text-align: right;">—</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">88</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">30 / 30</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF7 / 500</td>
|
|
<td style="text-align: right;">120</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">30 / 30</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>The SF8 automatic preamble retains a measured floor of 88 symbols. Automatically
|
|
selected preambles always round up in steps of eight.</p>
|
|
<h2 id="fractional-symbol-tuning">Fractional-symbol tuning</h2>
|
|
<p>The initial sweep started at 4.2 slow symbols, with an increase of 0.1 planned
|
|
for any slow-channel loss. That first sweep passed all three fast settings.
|
|
Each completed run used 50 requested adverts per profile. The SF8 fast run was
|
|
interrupted to check SF9 preamble 32, then restarted; only its completed run is
|
|
included below.</p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th style="text-align: right;">Slow symbols</th>
|
|
<th>Fast profile</th>
|
|
<th style="text-align: right;">Fast preamble</th>
|
|
<th style="text-align: right;">Fast RX / TX</th>
|
|
<th style="text-align: right;">Slow RX / TX</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td style="text-align: right;">4.2</td>
|
|
<td>SF9 / 500</td>
|
|
<td style="text-align: right;">48</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td style="text-align: right;">4.2</td>
|
|
<td>SF9 / 500</td>
|
|
<td style="text-align: right;">32</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td style="text-align: right;">4.2</td>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">88</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td style="text-align: right;">4.2</td>
|
|
<td>SF7 / 500</td>
|
|
<td style="text-align: right;">120</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>The four completed pairings received 200/200 packets on the slower channel and
|
|
200/200 on the faster channel. No switch failures were reported; the longest
|
|
measured switch during the 4.2-symbol sweep was 4.407 ms.</p>
|
|
<p>The explicit SF9 preamble-32 check uses the same 8.602 ms slow and 8.166 ms fast
|
|
windows as the preamble-48 check. Only the fast transmitter's preamble changes.
|
|
The automatic SF9 calculation still reserves a 48-symbol preamble for the
|
|
configured switching and loop-jitter budgets.</p>
|
|
<h2 id="shorter-fast-preambles">Shorter fast preambles</h2>
|
|
<p>The follow-up starts with preamble 48 on both fast settings. Each miss advances
|
|
the next candidate by eight symbols. The receive-window budgets stay at 4.2
|
|
slow symbols and the same remaining fast-channel time.</p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>Fast profile</th>
|
|
<th style="text-align: right;">Preamble</th>
|
|
<th style="text-align: right;">Fast RX / TX</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">48</td>
|
|
<td style="text-align: right;">49 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">56</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF7 / 500</td>
|
|
<td style="text-align: right;">48</td>
|
|
<td style="text-align: right;">42 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF7 / 500</td>
|
|
<td style="text-align: right;">56</td>
|
|
<td style="text-align: right;">41 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF7 / 500</td>
|
|
<td style="text-align: right;">64</td>
|
|
<td style="text-align: right;">45 / 50</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF7 / 500</td>
|
|
<td style="text-align: right;">72</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>The slower channel passed 50/50 paired with SF8/56, but then received <strong>49/50</strong>
|
|
paired with SF7/72. Across the completed 4.2-symbol slow-channel runs, that is
|
|
299/300. This later miss invalidated the provisional 4.2-symbol choice and
|
|
triggered the next headroom test at 4.3 symbols. Fast-preamble baselines carry
|
|
forward as 32 for SF9, 56 for SF8 and 72 for SF7, advancing by eight on a miss.</p>
|
|
<p>At 4.3 symbols, the SF9/32 pairing received 100/100 slow packets and 50/50 fast
|
|
packets. The next SF8/56 pairing received only 42/50 slow packets, so that
|
|
candidate also failed. A control run with scanning disabled received 50/50 on
|
|
the slow channel. At 4.4, SF8/56 passed 100/100 slow and 50/50 fast, but the
|
|
SF7/72 pairing then received 49/50 slow packets.</p>
|
|
<p>At 4.5, the SF7 pairing passed 100/100 slow packets. Fast preamble 72 received
|
|
47/50, so the next baseline increased to 80 and passed 50/50. The following
|
|
SF8/56 slow run received 49/50, triggering 4.6 symbols. Baselines now carry
|
|
forward as SF9/32, SF8/56 and SF7/80.</p>
|
|
<p>At 4.6, both SF8/56 and SF7/80 passed 100/100 slow packets and 50/50 fast
|
|
packets. The following SF9/32 slow run received 49/50, triggering 4.7 symbols.
|
|
There were no switch failures; the longest observed switch was 4.414 ms.</p>
|
|
<p>At 4.7, the SF9/32 slow run passed its first 50 packets but received 99/100
|
|
over the full run. This triggered 4.8 symbols, with the same fast preamble
|
|
baselines. No fast-channel run was started for the 4.7 candidate.</p>
|
|
<h2 id="selected-bench-baseline-48-slow-symbols">Selected bench baseline: 4.8 slow symbols</h2>
|
|
<p>The 4.8-symbol sweep passed all three slow-channel checks, totaling 300/300.
|
|
Slow visits are 9.831 ms and fast visits 6.937 ms, plus actual switching time.
|
|
The longest measured switch was 4.491 ms, with no switch failures.</p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>Fast profile</th>
|
|
<th style="text-align: right;">Fast preamble</th>
|
|
<th style="text-align: right;">Fast RX / TX</th>
|
|
<th style="text-align: right;">Slow RX / TX</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>SF9 / 500</td>
|
|
<td style="text-align: right;">32</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">100 / 100</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">56</td>
|
|
<td style="text-align: right;">49 / 50</td>
|
|
<td style="text-align: right;">100 / 100</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF8 / 500</td>
|
|
<td style="text-align: right;">64</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">—</td>
|
|
</tr>
|
|
<tr>
|
|
<td>SF7 / 500</td>
|
|
<td style="text-align: right;">80</td>
|
|
<td style="text-align: right;">50 / 50</td>
|
|
<td style="text-align: right;">100 / 100</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>The SF8 miss advanced its baseline from 56 to 64, exactly eight symbols. Its
|
|
slow-channel check preceded that increase; changing the fast preamble leaves
|
|
the idle receive-window calculation unchanged. The final fast-channel attempts
|
|
received 150/150, using explicit preambles <strong>32 / 64 / 80</strong> for SF9 / SF8 / SF7.
|
|
These become the starting values for further tests, increasing by eight on a
|
|
fast-channel miss. A slow-channel miss instead advances the listen window by
|
|
0.1 symbol.</p>
|
|
<p>The production automatic preambles remain <strong>48 / 88 / 120</strong>, retaining the
|
|
switching, loop-jitter and acquisition budgets. The shorter explicit values are
|
|
bench results under the conditions above, not a guarantee for other boards or
|
|
traffic patterns.</p>
|
|
<h2 id="transmit-policy">Transmit policy</h2>
|
|
<p>Hardware checks send three zero-hop adverts from the V4 with the XIAO listening
|
|
on profile 2. OTA startup traffic is allowed to settle before taking the counter
|
|
snapshots. The completed cases are:</p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>V4 profiles and policy</th>
|
|
<th style="text-align: right;">TX on primary / secondary</th>
|
|
<th style="text-align: right;">Received by XIAO</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>Permanent / permanent, <code>auto</code></td>
|
|
<td style="text-align: right;">3 / 3</td>
|
|
<td style="text-align: right;">3</td>
|
|
</tr>
|
|
<tr>
|
|
<td>Permanent / permanent, <code>off</code></td>
|
|
<td style="text-align: right;">3 / 0</td>
|
|
<td style="text-align: right;">0</td>
|
|
</tr>
|
|
<tr>
|
|
<td>Permanent / temporary, <code>auto</code></td>
|
|
<td style="text-align: right;">3 / 0</td>
|
|
<td style="text-align: right;">0</td>
|
|
</tr>
|
|
<tr>
|
|
<td>Permanent / temporary, <code>on</code></td>
|
|
<td style="text-align: right;">3 / 3</td>
|
|
<td style="text-align: right;">3</td>
|
|
</tr>
|
|
<tr>
|
|
<td>Secondary RX only, <code>on</code></td>
|
|
<td style="text-align: right;">3 / 0</td>
|
|
<td style="text-align: right;">0</td>
|
|
</tr>
|
|
<tr>
|
|
<td>Temporary / temporary, <code>auto</code></td>
|
|
<td style="text-align: right;">3 / 3</td>
|
|
<td style="text-align: right;">3</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>A separate isolation check issued three explicit OTA announce commands with
|
|
normal <code>radio</code>, RX-only <code>tempradio2</code> and <code>radio2.cross auto</code>. The completed TX
|
|
counters stayed unchanged on both profiles (0 / 0), confirming that locally
|
|
generated OTA traffic does not fall back to the normal channel in that mode.</p>
|
|
<p>Turning <code>radio2</code> off stopped scanning. A one-minute <code>tempradio2</code> session also
|
|
returned to one profile on expiry. Rebooting with a saved SF8 RX profile and an
|
|
active temporary SF9 RX/TX profile cleared the temporary session and restored
|
|
the saved SF8 profile, including its automatic 88-symbol preamble.</p>
|
|
<h2 id="ota-discovery-while-retaining-the-main-channel">OTA discovery while retaining the main channel</h2>
|
|
<p>Both boards ran normal SF7 / 62.5 kHz on the primary and temporary SF8 / 500 kHz
|
|
RX/TX on the secondary, using <code>radio2.cross auto</code> and automatic preambles 32/88.
|
|
The XIAO discovered the V4's firmware catalogue over profile 2, and both boards
|
|
recorded received and transmitted OTA packets there. Ten V4 zero-hop adverts
|
|
then arrived on the XIAO's primary profile (10/10), with both temporary second
|
|
profiles still active. The XIAO reported no switch failures and a longest switch
|
|
of 4.547 ms during this check.</p>
|
|
<p>This hardware check covers discovery, bidirectional OTA traffic and concurrent
|
|
availability of the main channel between packets. It does not perform a complete
|
|
firmware transfer or install. Byte-exact transfer validation is provided by the
|
|
shared OTA software tests described below.</p>
|
|
<h2 id="software-coverage">Software coverage</h2>
|
|
<p>Native tests cover identical-packet fanout, separate retry ownership and coding
|
|
rates, channel-busy backoff, generation changes, temporary-session isolation,
|
|
deferred replies and stale-packet removal. Tests using the production CLI cover
|
|
parsing, persistence failures, schedules, expiry and clock rollover. A physical
|
|
radio mock exercises the production scan transitions, pending RX interrupts,
|
|
RX power-saving restoration and failed profile switches.</p>
|
|
<p>The full native suite passed 1,422 cases after the RX-only OTA isolation fix;
|
|
all eight KISS modem tests also passed. Subsequent timing changes through 4.8
|
|
symbols passed the 63-case retry/profile suite and production CLI and scan
|
|
harnesses. Shared OTA transfer tests passed byte-exact checks with
|
|
AddressSanitizer and UndefinedBehaviorSanitizer for ESP32 and nRF52 variants.</p>
|
|
<p>Build coverage includes the Heltec V4 repeater, room server, sensor and terminal
|
|
chat, the Full XIAO Companion, and the nRF52 T1000-E repeater. The nRF52 result
|
|
is a build check; these receive measurements use the ESP32/SX1262 boards above.</p>
|
|
<h2 id="hardware-restored-after-validation">Hardware restored after validation</h2>
|
|
<p>Both boards were returned to their original B soak images after the checks:
|
|
<code>v1.17.1-soak-v4-B</code> and <code>v1.17.1-soak-xiao-B</code>. The V4 retained 909.5 MHz,
|
|
SF7 / 62.5 kHz, CR 4/5 and TX 0; the XIAO retained 910.525 MHz with the same
|
|
modulation and TX 22. Both reconnected to Wi-Fi and their custom MQTT service.
|
|
The soak logs resumed under <code>B-post-radio2-soak</code>. These restored images are the
|
|
earlier memory-soak firmware; the new dual-profile code is validated by the
|
|
finite tests above, not by a months-long uptime run.
|
|
The Pi's soak service and Indicator telemetry were also healthy after restoration.</p>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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