salty ed1542ae11 feat: rewrite UWB firmware for DW1000 (all 3 boards) ...

Anchor (esp32/uwb_anchor):
- DW1000Ranging library (200m range, MODE_LONGDATA_RANGE_ACCURACY)
- Unique addresses per anchor (anchor0/anchor1 build envs)
- +RANGE output: anchor_id, tag_addr, range_mm, rssi
- ESP-NOW receiver: forwards tag packets + priority E-STOP to Jetson
- AT+ID? command

Tag with Display (esp32/uwb_tag):
- DW1000Ranging as tag, auto-discovers anchors
- SSD1306 OLED: big distance, per-anchor ranges, RSSI bars, link status
- ESP-NOW broadcast: range/heartbeat/estop packets
- E-Stop on GPIO 0 (BOOT button), 10Hz TX while held
- Display at 5Hz, ranging driven by DW1000Ranging.loop()

Shared:
- lib/DW1000/ extracted from mf_DW1000.zip (Makerfabs fork)
- lib_extra_dirs for PlatformIO to find local library

2026-03-14 12:30:26 -04:00

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