ESPHome on ESP32C6 with Xiao 24GHz mmWave = no data

Products & Technology XIAO
1

Hi :wave:
I have a Xiao 24GHz mmWave connected to a Seeed ESP32C6 but cannot get any sensor data. I using ESPHome and started with this configuration here, which is for the Seeed MR60BHA2 (based on the ESP32C6). The problem is, no matter what I do, I am not able to see sensor data in ESPHome.

I have tried:

  • A different Seeed ESP32-C6, same problem
  • Changing the firmware version on the mmWave sensor (via the app, bluetooth)
  • Changing the baud rate on the mmWave sensor (via the app, bluetooth)
  • Resetting the mmWave sensor back to defaults (via the app, bluetooth)
  • Switching back to ESP32-C3, sensor works perfectly

Is there something here I am missing with UART on the ESP32C6 and/or ESPHome?

This is my config:

esp32:
  board: esp32-c6-devkitc-1
  variant: esp32c6
  flash_size: 4MB
  framework:
    platform_version: 6.6.0
    type: esp-idf
    version: 5.2.1
    sdkconfig_options:
      CONFIG_ESPTOOLPY_FLASHSIZE_4MB: y

logger:
  level: DEBUG
  baud_rate: 0

uart:
  id: ld2410_uart
  baud_rate: 256000
  rx_pin: 17
  tx_pin: 16

ld2410:
  uart_id: ld2410_uart
  throttle: 500ms

binary_sensor:
  - platform: ld2410
    has_target:
      name: Presence
    has_moving_target:
      name: Moving Target
    has_still_target:
      name: Still Target
    out_pin_presence_status:
      name: out pin presence status

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2

Hi there,

Yes. :grinning: I bet it doesn’t work in the App then?

HTH
GL :slight_smile: PJ :v:

baud_rate: 115200
rx_pin: 17 (no such pin no,) C3 it’s GPIO4 & GPIO5 , C6 its GPIO02(RX) & GPIO21(TX)
tx_pin: 16 (nope)
parity: NONE
stop_bits: 1

FYI, Those pins are for the DeV-KIT 1C hardware, you are using a Xiao.

1 Like
3

Sorry, yes to what? I don’t understand :upside_down_face:

1 Like
4

Hi there,

Just messing with you, Fix those pin nums , you be golden
:v:
PJ :slight_smile:

from the wiki, example: for c3

# Per https://wiki.seeedstudio.com/XIAO_ESP32C3_Getting_Started/#pinout-diagram and https://wiki.seeedstudio.com/mmwave_for_xiao/#hardware-overview
uart:
  tx_pin: GPIO5
  rx_pin: GPIO4
  baud_rate: 9600

# Example configuration entry from https://esphome.io/components/sensor/ld2410
ld2410:

binary_sensor:
  - platform: ld2410
    has_target:
      name: Presence
    has_moving_target:
      name: Moving Target
    has_still_target:
      name: Still Target
    out_pin_presence_status:
      name: out pin presence status

change the Gpio’s of 04 & 05 to 02 & 21 :+1: for c6

1 Like
5

You are my hero @PJ_Glasso :sparkling_heart: Now it works.

But I don’t understand where do you get these pin numbers from? If I look at the official docs, it clearly shows GIO16/17 for UART?