SFU bring-up

Archived hardware diagnostics and host-driven WebRTC probes for the N32R16V. The firmware checks PSRAM, Wi-Fi, time synchronization, verified HTTPS, and the RGB LED. Python clients supply signaling over USB while the board's WebRTC traffic travels over Wi-Fi to Cloudflare Realtime SFU.

The probes require explicit negotiated-channel creation in robot, then spectrum order. The maintained firmware performs its own HTTPS signaling; worker/tests/live.mjs checks the exhibit.

Follow the archive setup, then build and explicitly flash:

python3 archive/sfu-bringup/build.py
.tools/archive-python/bin/python archive/flash.py sfu-bringup
.tools/archive-python/bin/python archive/sfu-bringup/monitor.py

Run one probe at a time against this diagnostic firmware:

.tools/archive-python/bin/python archive/sfu-bringup/investigate-datachannels.py
.tools/archive-python/bin/python archive/sfu-bringup/probe-datachannels.py

investigate-datachannels.py isolates explicit stream creation. probe-datachannels.py exercises both reliability profiles, two subscribers, LED control, and per-viewer reply permission. It does not retest revocation of the first viewer; the maintained tests cover exclusive controller handoff. probe-sfu.py contains the common host client and a single-subscriber probe.

These probes control the board and allocate real SFU sessions. Reboot between probe runs: the native peer teardown may hang, as documented in archive transport notes. Results and any SDP captures stay under ignored artifacts/archive/sfu-bringup/.