dandri/HaloKeymind
1
0
Fork 0
mirror of https://github.com/mikecarper/MeshCore.git synced 2026-09-26 11:47:53 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
d64f026ed37a3ee27ff0084c5e47bfd57c391b40
HaloKeymind/pair_preamble32_validation/index.html
T
mikecarper d2d07c8bec deploy: 091c8d8324
2026-09-15 05:34:40 +00:00

3164 lines
50 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<!doctype html>
<html lang="en" class="no-js">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<meta name="description" content="Documentation for the open source MeshCore firmware">
<link rel="canonical" href="https://mikecarper.github.io/MeshCore/pair_preamble32_validation/">
<link rel="prev" href="../pair_4p6_300us_validation/">
<link rel="next" href="../payloads/">
<link rel="icon" href="../assets/images/favicon.png">
<meta name="generator" content="mkdocs-1.6.1, mkdocs-material-9.7.7">
<title>SF7/62.5 + SF8/500, fast switching and preamble 32 - MeshCore Docs</title>
<link rel="stylesheet" href="../assets/stylesheets/main.ec1eaa64.min.css">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback">
<style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style>
<link rel="stylesheet" href="../_stylesheets/extra.css">
<link rel="stylesheet" href="../_stylesheets/firmware_picker.css">
<link rel="stylesheet" href="../_stylesheets/telemetry_decoder.css">
<link rel="stylesheet" href="../_stylesheets/filter_tool.css">
<script>__md_scope=new URL("..",location),__md_hash=e=>[...e].reduce(((e,_)=>(e<<5)-e+_.charCodeAt(0)),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>
</head>
<body dir="ltr">
<input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
<input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
<label class="md-overlay" for="__drawer"></label>
<div data-md-component="skip">
<a href="#sf7625-sf8500-fast-switching-and-preamble-32" class="md-skip">
Skip to content
</a>
</div>
<div data-md-component="announce">
</div>
<header class="md-header md-header--shadow" data-md-component="header">
<nav class="md-header__inner md-grid" aria-label="Header">
<a href=".." title="MeshCore Docs" class="md-header__button md-logo" aria-label="MeshCore Docs" data-md-component="logo">
<img src="../_assets/meshcore.svg" alt="logo">
</a>
<label class="md-header__button md-icon" for="__drawer">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3zm0 5h18v2H3zm0 5h18v2H3z"/></svg>
</label>
<div class="md-header__title" data-md-component="header-title">
<div class="md-header__ellipsis">
<div class="md-header__topic">
<span class="md-ellipsis">
MeshCore Docs
</span>
</div>
<div class="md-header__topic" data-md-component="header-topic">
<span class="md-ellipsis">
SF7/62.5 + SF8/500, fast switching and preamble 32
</span>
</div>
</div>
</div>
<script>var palette=__md_get("__palette");if(palette&&palette.color){if("(prefers-color-scheme)"===palette.color.media){var media=matchMedia("(prefers-color-scheme: light)"),input=document.querySelector(media.matches?"[data-md-color-media='(prefers-color-scheme: light)']":"[data-md-color-media='(prefers-color-scheme: dark)']");palette.color.media=input.getAttribute("data-md-color-media"),palette.color.scheme=input.getAttribute("data-md-color-scheme"),palette.color.primary=input.getAttribute("data-md-color-primary"),palette.color.accent=input.getAttribute("data-md-color-accent")}for(var[key,value]of Object.entries(palette.color))document.body.setAttribute("data-md-color-"+key,value)}</script>
<label class="md-header__button md-icon" for="__search">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.52 6.52 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5"/></svg>
</label>
<div class="md-search" data-md-component="search" role="dialog">
<label class="md-search__overlay" for="__search"></label>
<div class="md-search__inner" role="search">
<form class="md-search__form" name="search">
<input type="text" class="md-search__input" name="query" aria-label="Search" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" required>
<label class="md-search__icon md-icon" for="__search">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0 1 16 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.52 6.52 0 0 1 9.5 16 6.5 6.5 0 0 1 3 9.5 6.5 6.5 0 0 1 9.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5"/></svg>
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11z"/></svg>
</label>
<nav class="md-search__options" aria-label="Search">
<button type="reset" class="md-search__icon md-icon" title="Clear" aria-label="Clear" tabindex="-1">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 6.41 17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/></svg>
</button>
</nav>
<div class="md-search__suggest" data-md-component="search-suggest"></div>
</form>
<div class="md-search__output">
<div class="md-search__scrollwrap" tabindex="0" data-md-scrollfix>
<div class="md-search-result" data-md-component="search-result">
<div class="md-search-result__meta">
Initializing search
</div>
<ol class="md-search-result__list" role="presentation"></ol>
</div>
</div>
</div>
</div>
</div>
<div class="md-header__source">
<a href="https://github.com/mikecarper/MeshCore/" title="Go to repository" class="md-source" data-md-component="source">
<div class="md-source__icon md-icon">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M439.6 236.1 244 40.5c-5.4-5.5-12.8-8.5-20.4-8.5s-15 3-20.4 8.4L162.5 81l51.5 51.5c27.1-9.1 52.7 16.8 43.4 43.7l49.7 49.7c34.2-11.8 61.2 31 35.5 56.7-26.5 26.5-70.2-2.9-56-37.3L240.3 199v121.9c25.3 12.5 22.3 41.8 9.1 55-6.4 6.4-15.2 10.1-24.3 10.1s-17.8-3.6-24.3-10.1c-17.6-17.6-11.1-46.9 11.2-56v-123c-20.8-8.5-24.6-30.7-18.6-45L142.6 101 8.5 235.1C3 240.6 0 247.9 0 255.5s3 15 8.5 20.4l195.6 195.7c5.4 5.4 12.7 8.4 20.4 8.4s15-3 20.4-8.4l194.7-194.7c5.4-5.4 8.4-12.8 8.4-20.4s-3-15-8.4-20.4"/></svg>
</div>
<div class="md-source__repository">
mikecarper/MeshCore
</div>
</a>
</div>
</nav>
</header>
<div class="md-container" data-md-component="container">
<main class="md-main" data-md-component="main">
<div class="md-main__inner md-grid">
<div class="md-sidebar md-sidebar--primary" data-md-component="sidebar" data-md-type="navigation" >
<div class="md-sidebar__scrollwrap">
<div class="md-sidebar__inner">
<nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
<label class="md-nav__title" for="__drawer">
<a href=".." title="MeshCore Docs" class="md-nav__button md-logo" aria-label="MeshCore Docs" data-md-component="logo">
<img src="../_assets/meshcore.svg" alt="logo">
</a>
MeshCore Docs
</label>
<div class="md-nav__source">
<a href="https://github.com/mikecarper/MeshCore/" title="Go to repository" class="md-source" data-md-component="source">
<div class="md-source__icon md-icon">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 7.1.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2025 Fonticons, Inc.--><path d="M439.6 236.1 244 40.5c-5.4-5.5-12.8-8.5-20.4-8.5s-15 3-20.4 8.4L162.5 81l51.5 51.5c27.1-9.1 52.7 16.8 43.4 43.7l49.7 49.7c34.2-11.8 61.2 31 35.5 56.7-26.5 26.5-70.2-2.9-56-37.3L240.3 199v121.9c25.3 12.5 22.3 41.8 9.1 55-6.4 6.4-15.2 10.1-24.3 10.1s-17.8-3.6-24.3-10.1c-17.6-17.6-11.1-46.9 11.2-56v-123c-20.8-8.5-24.6-30.7-18.6-45L142.6 101 8.5 235.1C3 240.6 0 247.9 0 255.5s3 15 8.5 20.4l195.6 195.7c5.4 5.4 12.7 8.4 20.4 8.4s15-3 20.4-8.4l194.7-194.7c5.4-5.4 8.4-12.8 8.4-20.4s-3-15-8.4-20.4"/></svg>
</div>
<div class="md-source__repository">
mikecarper/MeshCore
</div>
</a>
</div>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href=".." class="md-nav__link">
<span class="md-ellipsis">
Introduction
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../WiFi/" class="md-nav__link">
<span class="md-ellipsis">
WiFi and MQTT by Firmware Type
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../cad_scan_validation/" class="md-nav__link">
<span class="md-ellipsis">
SX1262 channel-scanning hardware results
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../carrier_wave/" class="md-nav__link">
<span class="md-ellipsis">
Carrier-wave RF checks
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../carrier_wave_validation/" class="md-nav__link">
<span class="md-ellipsis">
CW and CW2 validation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../cli_build_matrix/" class="md-nav__link">
<span class="md-ellipsis">
CLI Availability by Firmware Build
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../cli_command_availability/" class="md-nav__link">
<span class="md-ellipsis">
CLI Command Availability Matrix
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../cli_commands/" class="md-nav__link">
<span class="md-ellipsis">
CLI Commands
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../cli_settings_audit/" class="md-nav__link">
<span class="md-ellipsis">
CLI setting dispatch audit
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../companion_contact_cache/" class="md-nav__link">
<span class="md-ellipsis">
Full Companion contact caches
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../companion_contact_cache_results/" class="md-nav__link">
<span class="md-ellipsis">
Contact-cache and NimBLE RAM qualification
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../companion_offline_queue/" class="md-nav__link">
<span class="md-ellipsis">
Companion Offline Message Queue
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../companion_protocol/" class="md-nav__link">
<span class="md-ellipsis">
Companion Protocol
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../companion_radio_full/" class="md-nav__link">
<span class="md-ellipsis">
Full Companion
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../companion_usb_ascii_validation/" class="md-nav__link">
<span class="md-ellipsis">
USB Companion ASCII default validation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../companion_usb_client_validation/" class="md-nav__link">
<span class="md-ellipsis">
USB Companion client compatibility
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../docs/" class="md-nav__link">
<span class="md-ellipsis">
Local Documentation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../double_frequency_v4_validation/" class="md-nav__link">
<span class="md-ellipsis">
Double center-frequency write: V4 transmitter / XIAO receiver
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../esp32_memory_budget/" class="md-nav__link">
<span class="md-ellipsis">
Classic ESP32 image memory budget
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../espnow_bridge_setup/" class="md-nav__link">
<span class="md-ellipsis">
ESP-NOW bridge: simple setup
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../faq/" class="md-nav__link">
<span class="md-ellipsis">
Frequently Asked Questions
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../filter_tool/" class="md-nav__link">
<span class="md-ellipsis">
Filter policy playground
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../firmware_memory_budget/" class="md-nav__link">
<span class="md-ellipsis">
Firmware memory checks
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../firmware_picker/" class="md-nav__link">
<span class="md-ellipsis">
Firmware picker
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../flood_filtering/" class="md-nav__link">
<span class="md-ellipsis">
Flood Filtering and Moderation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../four_fixed_tx_dwell_validation/" class="md-nav__link">
<span class="md-ellipsis">
Four fixed transmitters: longer dwell repeats
</span>
</a>
</li>
<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>
</li>
<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>
<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>
<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>
<li class="md-nav__item">
<a href="../gps_tracking/" class="md-nav__link">
<span class="md-ellipsis">
GPS Tracking
</span>
</a>
</li>
<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>
<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>
<li class="md-nav__item">
<a href="../hardware_validation_checklist/" class="md-nav__link">
<span class="md-ellipsis">
Hardware validation checklist
</span>
</a>
</li>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<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>
<li class="md-nav__item">
<a href="../nrf52_power_management/" class="md-nav__link">
<span class="md-ellipsis">
nRF52 Power Management
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../number_allocations/" class="md-nav__link">
<span class="md-ellipsis">
Number Allocations
</span>
</a>
</li>
<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>
<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>
<li class="md-nav__item">
<a href="../ota_nrf52_bootloader_update/" class="md-nav__link">
<span class="md-ellipsis">
nRF52 bootloader updates over LoRa
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../ota_nrf52_qspi/" class="md-nav__link">
<span class="md-ellipsis">
nRF52 repeater LoRa OTA with external QSPI
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../ota_protocol/" class="md-nav__link">
<span class="md-ellipsis">
MeshCore OTA - .mota container &amp; LoRa protocol
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../ota_user_guide/" class="md-nav__link">
<span class="md-ellipsis">
Updating your node over the air (OTA) - user guide
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../packet_format/" class="md-nav__link">
<span class="md-ellipsis">
Packet Format
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../pair_4p6_300us_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF7/62.5 + SF8/500: 4.6 slow chirps, 0.3 ms reserve
</span>
</a>
</li>
<li class="md-nav__item md-nav__item--active">
<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
<label class="md-nav__link md-nav__link--active" for="__toc">
<span class="md-ellipsis">
SF7/62.5 + SF8/500, fast switching and preamble 32
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<a href="./" class="md-nav__link md-nav__link--active">
<span class="md-ellipsis">
SF7/62.5 + SF8/500, fast switching and preamble 32
</span>
</a>
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
<label class="md-nav__title" for="__toc">
<span class="md-nav__icon md-icon"></span>
Table of contents
</label>
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
<li class="md-nav__item">
<a href="#fixture-and-method" class="md-nav__link">
<span class="md-ellipsis">
Fixture and method
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#results" class="md-nav__link">
<span class="md-ellipsis">
Results
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#what-the-extra-chirp-changes" class="md-nav__link">
<span class="md-ellipsis">
What the extra chirp changes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#capture-integrity-deployment-and-cleanup" class="md-nav__link">
<span class="md-ellipsis">
Capture integrity, deployment and cleanup
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#follow-up" class="md-nav__link">
<span class="md-ellipsis">
Follow-up
</span>
</a>
</li>
</ul>
</nav>
</li>
<li class="md-nav__item">
<a href="../payloads/" class="md-nav__link">
<span class="md-ellipsis">
Payload Format
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../pr7_review_validation/" class="md-nav__link">
<span class="md-ellipsis">
PR #7 review and validation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../preamble_detection_investigation/" class="md-nav__link">
<span class="md-ellipsis">
Off-channel preamble investigation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../qr_codes/" class="md-nav__link">
<span class="md-ellipsis">
QR Codes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../radio_chirp_math_validation/" class="md-nav__link">
<span class="md-ellipsis">
Shared radio/radio2 chirp timing and preamble warnings
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../radio_dwell_policy_validation/" class="md-nav__link">
<span class="md-ellipsis">
Automatic dwell policy: 4.6 chirps on both profiles
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../radio_profile_switch_validation/" class="md-nav__link">
<span class="md-ellipsis">
SX1262 profile-switch validation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../radio_profiles/" class="md-nav__link">
<span class="md-ellipsis">
Two LoRa profiles on one radio
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../radio_profiles_validation/" class="md-nav__link">
<span class="md-ellipsis">
Dual-profile receive validation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../radio_receive_calibration/" class="md-nav__link">
<span class="md-ellipsis">
Radio receive calibration and recovery
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../rak3401_mota_chain/" class="md-nav__link">
<span class="md-ellipsis">
RAK3401 1W repeater compact LoRa update chain
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../role_feature_switches/" class="md-nav__link">
<span class="md-ellipsis">
Feature switches by role — 1.17.1.5 USA Cascade
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../s3_memory_soak_validation/" class="md-nav__link">
<span class="md-ellipsis">
ESP32-S3 OTA memory experiment
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../separated_radio_modulation_cache_validation/" class="md-nav__link">
<span class="md-ellipsis">
Separated radios, normal XIAO RX gain, and unchanged-modulation timing
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf10_10_vs_100hz_full_sample_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF10/125 full samples: 10 Hz versus 100 Hz first-pass detour
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf10_10hz_cr_detour_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF10/125: tiny first-pass frequency offset and coding-rate detour
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf10_full_retune_twice_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF10/125: apply the full radio settings twice per hop
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf10_nrf52_double_write_settling_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF10 / 125 kHz, XIAO nRF52 TX, double write, 1 ms delay grid
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf10_rollback_failure_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF10/125 rollback and wider-spacing failure isolation
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf125_settling_limits_validation/" class="md-nav__link">
<span class="md-ellipsis">
Descending SF10..SF5 / 125 kHz settling limits
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf5_250_dwell_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF5 / 250 kHz: four-channel dwell sweep
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf6_125_settling_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF6/125 four-channel post-switch settling sweep
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf6_5p1_trace_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF6 / 125 kHz: four channels at 5.1 chirps
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf6_channel_scan_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF6 / 125 kHz channel-count test
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../sf8_5p1_trace_validation/" class="md-nav__link">
<span class="md-ellipsis">
SF8 / 125 kHz: four-channel comparison at 5.1 chirps
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../spiffs_regular_file_reads/" class="md-nav__link">
<span class="md-ellipsis">
SPIFFS regular-file reads and login replay state
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../stats_binary_frames/" class="md-nav__link">
<span class="md-ellipsis">
Stats Binary Frame Structures
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../telemetry_decoder/" class="md-nav__link">
<span class="md-ellipsis">
Telemetry decoder
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../terminal_chat_cli/" class="md-nav__link">
<span class="md-ellipsis">
Terminal Chat CLI
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../usb_serial_backpressure/" class="md-nav__link">
<span class="md-ellipsis">
Native USB backpressure and radio liveness
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../v4_pixel5_font_trial/" class="md-nav__link">
<span class="md-ellipsis">
Small-screen message fonts
</span>
</a>
</li>
<li class="md-nav__item md-nav__item--nested">
<input class="md-nav__toggle md-toggle " type="checkbox" id="__nav_88" >
<label class="md-nav__link" for="__nav_88" id="__nav_88_label" tabindex="0">
<span class="md-ellipsis">
Releases
</span>
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_88_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_88">
<span class="md-nav__icon md-icon"></span>
Releases
</label>
<ul class="md-nav__list" data-md-scrollfix>
<li class="md-nav__item">
<a href="../releases/1.17.1.5-doc-audit/" class="md-nav__link">
<span class="md-ellipsis">
Markdown audit — 1.17.1.5 USA Cascade
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../releases/1.17.1.5/" class="md-nav__link">
<span class="md-ellipsis">
MeshCore 1.17.1.5 Dev - USA Cascade
</span>
</a>
</li>
<li class="md-nav__item">
<a href="../releases/1.17.1.6/" class="md-nav__link">
<span class="md-ellipsis">
MeshCore 1.17.1.6 Dev - USA Cascade
</span>
</a>
</li>
</ul>
</nav>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
<div class="md-sidebar__scrollwrap">
<div class="md-sidebar__inner">
<nav class="md-nav md-nav--secondary" aria-label="Table of contents">
<label class="md-nav__title" for="__toc">
<span class="md-nav__icon md-icon"></span>
Table of contents
</label>
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
<li class="md-nav__item">
<a href="#fixture-and-method" class="md-nav__link">
<span class="md-ellipsis">
Fixture and method
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#results" class="md-nav__link">
<span class="md-ellipsis">
Results
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#what-the-extra-chirp-changes" class="md-nav__link">
<span class="md-ellipsis">
What the extra chirp changes
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#capture-integrity-deployment-and-cleanup" class="md-nav__link">
<span class="md-ellipsis">
Capture integrity, deployment and cleanup
</span>
</a>
</li>
<li class="md-nav__item">
<a href="#follow-up" class="md-nav__link">
<span class="md-ellipsis">
Follow-up
</span>
</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
<div class="md-content" data-md-component="content">
<article class="md-content__inner md-typeset">
<a href="https://github.com/mikecarper/MeshCore/edit/keymindCascade/docs/pair_preamble32_validation.md" title="Edit this page" class="md-content__button md-icon" rel="edit">
<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>
</a>
<h1 id="sf7625-sf8500-fast-switching-and-preamble-32">SF7/62.5 + SF8/500, fast switching and preamble 32</h1>
<p>User-requested hardware validation, 2026-09-14. This is a finite HIL experiment,
not a production reliability guarantee. No production timing defaults or
automatic-preamble overrides are changed by this test.</p>
<h2 id="fixture-and-method">Fixture and method</h2>
<ul>
<li>Heltec V4 receiver, USB serial <code>44:1B:F6:69:CF:98</code>, normal chip RX gain (0x94).</li>
<li>RAK4631 <code>9AB3B64C641BA927</code>: stationary transmitter at 909.5 MHz, SF7/62.5 kHz.</li>
<li>T1000-E/LR1110 <code>34A9141999729D5D</code>: stationary transmitter at 910.5 MHz, SF8/500 kHz.</li>
<li>CR4/5, explicit header, CRC, 32-symbol preamble, synthetic 16-byte sequence-tagged
payloads. -9 dBm chip output. Only one transmitter sends at a time on host request.</li>
<li>Each transmitter initializes its assigned settings once. RF-frequency and
modulation-command counters must remain unchanged for every TX call.</li>
<li>100 fixed-channel controls per profile before scanning. Require 100/100 on
both before making a scan-timing inference.</li>
<li>Three scanner settings, 100 packets per profile per setting, randomized
interleaving and 10–180 ms arrival delays. A miss does not cause a retry,
retune, reset, or early end of the finite sample. The scan expectation expires
after 1000 ms, far longer than the test frame and randomized host delay.</li>
</ul>
<table>
<thead>
<tr>
<th>Case</th>
<th style="text-align: right;">Loop reserve (not a delay)</th>
<th style="text-align: right;">Slow visit</th>
<th style="text-align: right;">Fast visit</th>
</tr>
</thead>
<tbody>
<tr>
<td>4.1-chirp floor</td>
<td style="text-align: right;">0 ms</td>
<td style="text-align: right;">8.397 ms</td>
<td style="text-align: right;">23.171 ms</td>
</tr>
<tr>
<td>Spare time used for 5.1 slow chirps</td>
<td style="text-align: right;">0 ms</td>
<td style="text-align: right;">10.445 ms</td>
<td style="text-align: right;">21.123 ms</td>
</tr>
<tr>
<td>Previous reserve comparison</td>
<td style="text-align: right;">4 ms</td>
<td style="text-align: right;">8.397 ms</td>
<td style="text-align: right;">19.171 ms</td>
</tr>
</tbody>
</table>
<p>The 5.1 case reallocates 2.048 ms from the fast visit to the slow visit; it does
not increase the nominal cycle. The 4 ms reserve is omitted from the first two
cases. The theoretical switch allowance is 0.6 ms per hop; actual switching is
measured, never forced to equal that allowance. Changed SF/BW requires one
modulation command per hop; frequency-only cache-hit timings do not apply.</p>
<p>The scheduler uses the same asymmetric two-profile visit budget and the actual
production guarded <code>tuneProfile()</code> / fast RX implementation, but runs in a small
RAM-only HIL application, without the full production networking/UI load. All
retunes are single-pass, warm-XOSC, buffered 8 MHz SPI, zero added settling;
double frequency writes, detours and rollback experiments are off. Packet/busy
ownership guards are retained. Explicit 32 on both sides bypasses the historical
automatic SF8/500 88-symbol rule without removing it from production.</p>
<p>The selected radios already had disposable HIL firmware. Updates are
application-only: matching nRF52 SoftDevice IDs/address ranges and exact USB
serial/topology are checked. V4 partition metadata is read back and compared
before its application-only write. No bootloader, SoftDevice, settings backup,
gateway firmware or unrelated radio is changed. Prior images/captures remain.</p>
<h2 id="results">Results</h2>
<p>Finished all 800 unique probes, 2026-09-15 00:04:54–00:11:19 UTC (September 14
local time). Both stationary controls passed 100/100. All three scans completed
their full 100-packet sample per profile. No scan achieved 200/200.</p>
<table>
<thead>
<tr>
<th>Case</th>
<th style="text-align: right;">SF7/62.5 received</th>
<th style="text-align: right;">SF8/500 received</th>
<th style="text-align: right;">Total</th>
<th style="text-align: right;">Switch mean / max</th>
<th style="text-align: right;">Idle cycle mean / max</th>
</tr>
</thead>
<tbody>
<tr>
<td>4.1 chirps, no loop reserve</td>
<td style="text-align: right;">99/100</td>
<td style="text-align: right;">100/100</td>
<td style="text-align: right;">199/200</td>
<td style="text-align: right;">0.581 / 0.829 ms</td>
<td style="text-align: right;">32.717 / 34.733 ms</td>
</tr>
<tr>
<td>5.1 chirps, no loop reserve</td>
<td style="text-align: right;">100/100</td>
<td style="text-align: right;">97/100</td>
<td style="text-align: right;">197/200</td>
<td style="text-align: right;">0.572 / 0.834 ms</td>
<td style="text-align: right;">32.706 / 34.978 ms</td>
</tr>
<tr>
<td>4.1 chirps, 4 ms loop reserve</td>
<td style="text-align: right;">97/100</td>
<td style="text-align: right;">99/100</td>
<td style="text-align: right;">196/200</td>
<td style="text-align: right;">0.567 / 0.836 ms</td>
<td style="text-align: right;">28.701 / 31.195 ms</td>
</tr>
</tbody>
</table>
<p>Switch timing includes every successful hop during each stage, including
post-reception hops. The RX-only five-second windows averaged 0.554 ms per hop.
The largest observed switch was 0.836 ms: 0.6 ms is a nominal allowance, <strong>not a
measured worst-case bound</strong>. Direction-specific timing is in the validated
capture. Idle-cycle samples exclude packet-held visits but still include USB
command/loop scheduling; their occasional roughly 2 ms overshoots are real.</p>
<p>Every scan hop issued exactly one RF-frequency and one modulation command,
with one optimized RX restart. There were zero added settling delays, double
passes, frequency repeats, RF retries, USB result replays, device errors,
retune failures, RX mode errors, cache errors or off-channel acceptances.
All eight missed packets were sequence-matched RX timeouts with the receiver
still in RX mode and no device error. Both transmitters acknowledged exactly
400 transmissions and zero frequency/modulation writes during every packet.</p>
<p>Successful scan packets had mean SNR approximately +12.0 to +12.1 dB on the
slow profile and +12.8 dB on the fast profile. Mean RSSI was approximately
-20.4 to -20.7 dBm and -18.5 to -18.9 dBm, respectively. These are strong-signal
bench results; the controls passed, but weak-signal performance and possible
strong-signal/front-end effects are not established by this test.</p>
<h2 id="what-the-extra-chirp-changes">What the extra chirp changes</h2>
<p>An extra SF7/62.5 symbol is 2.048 ms, equivalent to <strong>four SF8/500 symbols</strong>.
Increasing the slow dwell from 4.1 to 5.1 preserves the full-sweep budget by
shortening the fast dwell, but increases the fast profile's uninterrupted
blind interval. With the nominal 0.6 ms hops, the 32-symbol fast preamble's
remaining time after the slow visit plus two hops falls from 6.787 to 4.739 ms
(13.26 to 9.26 fast symbols), before acquisition and scheduling overruns.
This is a timing-budget calculation, not an experimentally proven acquisition
threshold or a per-miss trace.</p>
<p>The observed 5.1 sample improved the slow result from 99 to 100, while the fast
result fell from 100 to 97. This is consistent with a dwell/acquisition tradeoff;
one finite sample per setting does not isolate the cause or establish a
statistically reliable ranking. Simply fitting a sweep inside a preamble does
not establish lossless acquisition. The 4 ms reserve is an allowance, not a
sleep; retaining it also did not produce a lossless result here.</p>
<p>Using genuine spare time above the 4.1 floor remains a reasonable policy to
investigate, but allocation must protect <strong>both</strong> profiles' acquisition/return
budgets and measured switching/scheduling overruns. Do not automatically spend
all of the reserve on longer slow visits, or treat the historic 88-symbol rule
as disproven by this nearly-lossless sample. No production defaults or warning
formula were changed by this hardware-test turn.</p>
<h2 id="capture-integrity-deployment-and-cleanup">Capture integrity, deployment and cleanup</h2>
<ul>
<li>Raw capture: <a href="../tools/hil/profile_pair_sf8_32_results.json">profile_pair_sf8_32_results.json</a>,
SHA-256 <code>3472883ade89494b64657486efd1645a04b0a3bebfd0a2e31bbf914341ad792f</code>.</li>
<li>Independent offline checks: <a href="../tools/hil/profile_pair_sf8_32_validated.json">profile_pair_sf8_32_validated.json</a>.
Checks all 800 unique sequences, 100/profile/phase, sender lifetime counts,
actual RX frequency/SF/BW/payload identity, command counts, policies and cleanup.</li>
<li><a href="../tools/hil/profile_pair_sf8_32_manifest.json">Manifest</a> records source and image hashes.
Bundle SHA-256 <code>d6cb9ff36be109af8906eddbbe8a4657ca793d1351ec4bf50ebbd4909eed2bba</code>.
Local bundle is <code>out/pair-sf8-32-20260914</code>; remote capture remains under
<code>/home/mikec/hwtest/runs/pair-sf8-32-20260914</code>.</li>
<li>Initial RAK USB reset returned EPROTO before any firmware write. The preserved
<a href="../tools/hil/profile_pair_sf8_32_deployment-prewrite-usb.json">pre-write record</a>
has an empty writes list. Inspection confirmed the exact RAK serial/topology
in its documented CDC-only bootloader PID 0x002A. Deployment was revised to
accept that identity (and reset-time disconnect only after exact bootloader
re-enumeration); no permission check or board-identity check was bypassed.
The revision hash and all three successful application-only writes are saved
in the deployment records. No bootloader or SoftDevice was replaced.</li>
<li>All three radios were rebooted and live-verified idle, with test firmware left
installed. ModemManager was restored active; gateway and host CLI services
remained active. The preexisting memory soak remains inactive. No unrelated
radio was flashed. Wrapper exit was zero.</li>
<li>All three HIL firmware builds passed, run sequentially. The HIL host regression
suite passed <strong>63/63 tests</strong>, including the new plan and packet-policy tests.
Python compile checks and scoped <code>git diff --check</code> passed. No commit or push.</li>
</ul>
<h2 id="follow-up">Follow-up</h2>
<p>The requested <a href="../pair_4p6_300us_validation/">4.6-chirp / 0.3 ms reserve follow-up</a>
completed 197/200 scanning packets: slow 97/100, fast 100/100, after fresh
100/100 controls on both profiles. Its captures are separate from this run.</p>
</article>
</div>
<script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script>
</div>
</main>
<footer class="md-footer">
<div class="md-footer-meta md-typeset">
<div class="md-footer-meta__inner md-grid">
<div class="md-copyright">
Made with
<a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener">
Material for MkDocs
</a>
</div>
</div>
</div>
</footer>
</div>
<div class="md-dialog" data-md-component="dialog">
<div class="md-dialog__inner md-typeset"></div>
</div>
<script id="__config" type="application/json">{"annotate": null, "base": "..", "features": ["content.action.edit", "content.code.copy", "search.highlight", "search.suggest"], "search": "../assets/javascripts/workers/search.2c215733.min.js", "tags": null, "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}, "version": null}</script>
<script src="../assets/javascripts/bundle.d7400e89.min.js"></script>
<script src="../_javascript/firmware_picker.js"></script>
<script src="../_javascript/telemetry_decoder.js"></script>
<script src="../_javascript/filter_tool.js"></script>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink