Quick start

Offline

uv sync
uv run fwkit info firmware/JX402_V1.0.0.73.bin
uv run fwkit verify firmware/JX402_V1.0.0.73.bin

The inner contents of the image are unpacked for exploration:

uv run fwkit unpack firmware/JX402_V1.0.0.73.bin work/aota

BLE, read-only

uv run python tools/cmf_watch.py scan
uv run python tools/cmf_watch.py pair          # once, or after a reset
uv run python tools/cmf_watch.py info
uv run python tools/cmf_watch.py ota-state --duration 5

Watch faces

uv run fwkit wf-info watchfaces/wf1.bin --tree
uv run fwkit wf-res  watchfaces/wf1.bin
uv run fwkit wf-unpack watchfaces/wf1.bin work/wf1
uv run fwkit wf-set-res watchfaces/wf1.bin 0 icon.png -o work/wf1_new.bin
uv run python tools/cmf_watch.py wf-flash --file work/wf1_new.bin --dry-run

The --dry-run flag is removed only after the validation passes. See Dial editing.

Firmware OTA

This stage comes last, after the step-by-step OTA guide and the AOTA OTA flow have been reviewed. The dry run stops at the acknowledgement stage:

uv run python tools/ota_client.py --stop-after-a040 --version 0100005a -v

The run stops after the watch acknowledges 0xA040; no data is sent.