mattandClaude
b9162db707
Firmware for a Seeed XIAO ESP32-C6 driving a C4001 24GHz radar, with a web UI for live data and calibration. - Auto-detects whether the C4001 is on I2C (0x2A/0x2B) or UART, so the board's mode switch position doesn't matter. Serves the probe log over HTTP when nothing is found. - Single-page UI inlined into flash (no CDN, so it works in AP mode): presence state, target count, range, speed, energy, rolling 60s chart, and mode-aware calibration controls. - Joins WiFi from a gitignored include/secrets.h, falls back to a "xiao-mmwave" AP, registers mmwave.local. - Poll rate adapts to the interface: UART at 9600 costs ~60ms per register round-trip, so polling it at the I2C rate starved the HTTP server. Two hardware gotchas documented in the README: - The sensor UART must not use D6/D7. Those are GPIO16/17, the C6's hard-wired U0TXD/U0RXD. Pointing Serial1 at them deadlocks the UART driver and trips the interrupt watchdog, boot-looping the board. UART1 has no fixed pins, so it routes through the GPIO matrix to D10/D9. - DFRobot's own wiring table pairs the sensor's RX with the MCU's RX, and their library swaps the rxpin/txpin parameter names between the header and the .cpp. Verified on ESP32-C6FH4 rev v0.1, 4MB flash: builds at 57.6% flash / 11.9% RAM, flashes over the native USB Serial/JTAG port, and reads a live C4001 on I2C @ 0x2A. Co-Authored-By: Claude <noreply@anthropic.com>
29 lines
1005 B
INI
29 lines
1005 B
INI
; XIAO ESP32-C6 + DFRobot C4001 24GHz mmWave presence sensor
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;
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; Board detected on this machine:
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; ESP32-C6FH4 (QFN32) rev v0.1, 4MB embedded flash, USB-Serial/JTAG
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; MAC e4:b3:23:b4:7b:c4 on /dev/ttyACM0
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;
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; NOTE: ESP32-C6 needs Arduino-ESP32 core 3.x. The installed platform
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; (espressif32 @ 2026.02.30, the pioarduino fork) ships core 3.3.7 and has
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; the XIAO_ESP32C6 variant, so this builds as-is. The old espressif32 6.x
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; from PlatformIO's registry does NOT support C6 -- don't downgrade.
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[env:seeed_xiao_esp32c6]
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platform = espressif32
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board = seeed_xiao_esp32c6
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framework = arduino
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monitor_speed = 115200
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monitor_filters = esp32_exception_decoder, time
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upload_port = /dev/ttyACM0
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monitor_port = /dev/ttyACM0
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; Pulled straight from DFRobot's repo. The registry copy lags behind.
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lib_deps =
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https://github.com/DFRobot/DFRobot_C4001.git
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build_flags =
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-DARDUINO_USB_CDC_ON_BOOT=1 ; Serial -> USB CDC, so the monitor works over the native port
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-DCORE_DEBUG_LEVEL=1
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