Console: imu prints what the motion sensor reads

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0162FokPdvY2KsS4NBfwyWPk

site/content/dev/debug/commands.md

@@ -26,6 +26,7 @@ lora capture start|stop   a LoRa Capture to /captures/lora (pcap, LoRaTap)
 lora sweep on [from MHz] [to MHz] [step kHz] | lora sweep off | lora sweep dump   RSSI across a band (863 870 100)
 lora custom <MHz> <BW kHz> <SF> <CR 5-8> <sync hex> [preamble]   e.g. 868.1 125 7 5 34 8 (LoRaWAN)
 gnss quiet on|off   pause the GNSS receiver while the LoRa radio listens (it costs the radio 8 dB)
+imu                 what the motion sensor reads: g on its three axes, then degrees a second
 gnss status | gnss restart | gnss track start|stop | gnss nmea on|off | gnss send <sentence without $ and checksum>
 crash             the last crash: firmware, reason, task, backtrace
 coredump erase    forget the core dump in flash
@@ -107,6 +108,7 @@ In **Safe Mode** (see [Crashes and Safe Mode](/dev/debug/crashes/)) only a few r
 | `lora capture start` / `lora capture stop` | A LoRa Capture, as `c` in the App |
 | `lora sweep on [from MHz] [to MHz] [step kHz]` / `lora sweep off` / `lora sweep dump` | Sweep a band (863 870 100 by default), with a summary every 2 s (floor, strongest, peaks), or print the latest pass |
 | `gnss quiet on` / `gnss quiet off` | The "Pause GNSS for LoRa" setting |
+| `imu` | What the motion sensor reads: g on its three axes, then degrees a second (the Compass, issue #16) |
 | `gnss status` / `gnss restart` | The receiver's state, and a restart of it |
 | `gnss track start` / `gnss track stop` | A Track, as `r` in the GNSS App (the reason is printed if it can't start) |
 | `gnss nmea on` / `gnss nmea off` | Prints each NMEA sentence the receiver sends, as `nmea: …` |