Getting m5stack atom lite and the ENVIII setup?

ESPHome
,
1

Has anyone have this working with ESPHome builder / Home Assistant?

I have

  • M5Stack ATOM Lite
  • M5Stack EnvIII sensor (connected with HY2.0-4P Cable).
  • ESPHome builder 2025.6.3
  • HA Green running 2025.7 (also tested on 2025.6.x)

I can compile and install the config to the atom lite over USB connected to the HA Green. Once installed I can access the ATOM Lite via wifi

At the end of the install process I do get this error, with similar error if I access the logs over wifi

[11:47:31][C][i2c.idf:083]: I2C Bus:
[11:47:31][C][i2c.idf:084]:   SDA Pin: GPIO21
[11:47:31][C][i2c.idf:084]:   SCL Pin: GPIO22
[11:47:31][C][i2c.idf:084]:   Frequency: 50000 Hz
[11:47:31][C][i2c.idf:094]:   Recovery: bus successfully recovered
[11:47:31][I][i2c.idf:104]: Results from bus scan:
[11:47:31][I][i2c.idf:106]: Found no devices
[11:47:31][C][factory_reset.button:011]: Factory Reset Button 'Factory reset'
[11:47:31][C][factory_reset.button:011]:   Icon: 'mdi:restart-alert'
[11:47:31][C][sht3xd:049]: SHT3xD:
[11:47:31][D][sht3xd:052]:   Error reading serial number
[11:47:31][E][sht3xd:061]:   Communication with SHT3xD failed!
[11:47:31][E][component:088]:   Component sht3xd.sensor is marked FAILED:

Would anyone see where I have gone wrong, I am assuming that the code snippet for the env sensor needs tweaking but I am unsure how to get the correct settings.

Yaml

esphome:
  name: air-test
  friendly_name: air-test
  min_version: 2025.6.0
  name_add_mac_suffix: true

# https://github.com/esphome/issues/issues/5294#issuecomment-2075784260
# https://github.com/esphome/issues/issues/5710#issuecomment-2063260398
#external_components:
#  - source:
#      type: git
#      url: https://github.com/mrtoy-me/esphome-my-components
#      ref: main
#    components: [ sht3xd ]

esp32:
  board: m5stack-atom
  framework:
    type: esp-idf

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa="

ota:
  - platform: esphome
    password: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  manual_ip:
    static_ip: 10.1.1.5
    gateway: 10.1.1.1
    subnet: 255.255.255.0


button:
  - platform: safe_mode
    id: button_safe_mode
    name: Safe Mode Boot

  - platform: factory_reset
    id: factory_reset_btn
    name: Factory reset



# Example configuration entry for the ENV III sensor
i2c:
  sda: 21
  scl: 22
  scan: True
  id: bus_a

# Individual sensors
sensor:
  - platform: sht3xd
    temperature:
      name: "Temperature"
      id: temperature_sensor
    humidity:
      name: "Humidity"
      id: humidity_sensor
    address: 0x44
    update_interval: 60s
2

Does ‘factory reset’ wipe out all your settings?

3

Not something I have tried or needed to. It’s left over initial ESPHome build config

4

It looks like the Grove connection on that board is GPIO32 and GPIO26, not the pins you have chosen:

Also - check out the discussion re i2c and esp32 using the idf framework:

1 Like
5

Thank you this was it. I will eventually get the hang of groking all this information from datasheets to use properly

logs

INFO ESPHome 2025.6.3
INFO Reading configuration /config/esphome/air-test.yaml...
INFO Starting log output from /dev/ttyUSB1 with baud rate 115200
[20:15:42][D][sht3xd:097]: Got temperature=22.48°C humidity=54.58%
[20:15:42][D][sensor:098]: 'Temperature': Sending state 22.47921 °C with 1 decimals of accuracy
[20:15:42][D][sensor:098]: 'Humidity': Sending state 54.57847 % with 1 decimals of accuracy

Working yaml config.

esphome:
  name: air-test
  friendly_name: air-test
  min_version: 2025.6.0
  name_add_mac_suffix: true

esp32:
  board: m5stack-atom
  framework:
    type: esp-idf

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

ota:
  - platform: esphome
    password: "aaaaaaaaaaaaaaaaaaaaaaa"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  manual_ip:
    static_ip: 10.1.1.5
    gateway: 10.1.1.1
    subnet: 255.255.255.0

# Example configuration entry for the ENV III sensor
i2c:
  sda: 26
  scl: 32
  scan: True
  id: bus_a
  frequency: 800kHz
  timeout: 10ms

# Individual sensors
sensor:
  - platform: sht3xd
    temperature:
      name: "Temperature"
      id: temperature_sensor
    humidity:
      name: "Humidity"
      id: humidity_sensor
    address: 0x44
    update_interval: 60s