ADC Pin mapping for seeed_xiao_esp32c3

ESPHome
1

Hi, i’m getting error defining ADC pins available in seeed_xiao_esp32c3 board:

esphome:
  name: clamps-my
  platformio_options:
    board_build.flash_mode: dio  

esp32:
  board: seeed_xiao_esp32c3
  variant: esp32c3
  framework:
    type: esp-idf

sensor:                                      

  - platform: adc

    pin: GPIO2

    attenuation: auto

    accuracy_decimals: 5

    id: adc_sensor_ct1

  - platform: adc

    pin: GPIO3

    attenuation: auto

    accuracy_decimals: 5

    id: adc_sensor_ct2

  - platform: adc

    pin: GPIO4

    attenuation: auto

    accuracy_decimals: 5

    id: adc_sensor_ct3

  - platform: adc

    pin: GPIO5

    attenuation: auto

    accuracy_decimals: 5

    id: adc_sensor_ct4

So, the last one (GPIO05) it’s showing ESP32C3 doesn’t support ADC on this pin. , but the reference pins shows me that GPIO05 it’s available.

image
image1234×683 108 KB

So, how can use GPIO05 as ADC?,Thanks ofr your support!

2

Try it without variant: - it is optional and I think will be implied by board: seeed_xiao_esp32c3

3

Looking further, the supported adc’s for esp32c3 seem to be defined here

Note that they are all ADC1. However according to the docs here https://files.seeedstudio.com/wiki/Seeed-Studio-XIAO-ESP32/esp32-c3_datasheet.pdf gpio5 is on ADC2 (see 2.2 Pin Description).

Don’t know if it is fixable for you, but maybe an issue on github might get you more info.

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