Pre-building all seven settings sub-views at construction created ~100 LVGL objects that (being <256B) allocated into internal DRAM via the hybrid allocator. On the T-Deck that fragmented internal heap to an 8180B largest block at LVGL task-creation time, and the 8KB task (needs ~8.5KB with TCB) failed: xTaskCreatePinnedToCore returned errQUEUE_FULL, the device parked on the boot splash, and confirm_running_firmware never ran. Root cause proven with an on-device heap probe (largest internal block 8180B, 8192-stack task FAIL, 4096-stack OK), then fixed by building each sub-view on first navigation. Boot-time internal DRAM rises to a 47KB largest block and the task starts cleanly. Signed-off-by: Torlando <tyler@torlando.tech>
Pyxis
An LXMF and LXST client firmware for T-Deck, built on a highly modified fork of microReticulum
Very much WIP, don't expect stability :)
Features
Reticulum transport over:
- RNode-compatible LoRa
- AutoInterface (local wifi)
- TCP Client
- BLE Interface (barely working if at all)
Other features:
- GPS-synced time
- One really annoying beep when you get a new message (user toggle)
- View the announce stream
- Choose a propagation node (and sync with it) (fixed in v0.2.1)
- Set auto announce timer
- Light up keyboard (user toggle)
Will crash in about 5 minutes of normal use (sorry)I had 5d uptime on v0.2.0 with BLE disabled- Make LXST voice calls (codec2 only, quality sounds horrible coming out the other end in Columba, needs work)
Flashing
The easiest way to get Pyxis running is the web flasher, which downloads release firmware from this repository's releases and verifies each image's SHA-256 digest against the release metadata.
For esptool (or any other tool that writes raw flash), each release also publishes a merged binary (pyxis-<tag>-merged.bin) that contains the bootloader, partition table, OTA selector, and application at their fixed offsets. Provision a T-Deck Plus (8 MB flash) with:
esptool.py --chip esp32s3 erase_flash
esptool.py --chip esp32s3 write_flash 0x0 pyxis-<tag>-merged.bin
Merged binaries are for first install / provisioning. Flashing one overwrites every flash region, including NVS (settings, identity) and the LittleFS partition (messages, paths, maps). To update an existing device without losing data, flash firmware.bin to 0x10000 only, or use the Columba-compatible pyxis-<tag>.pyxis.zip update package.
Why "Pyxis"
Pyxis, latin for "compass," is a constellation in the southern sky depicting a mariner's compass. Small but essential, the compass ensures every message finds its destination - even when the path is uncertain.