ES7243

The es7243 platform allows your ESPHome devices to use the ES7243 stereo audio ADC (datasheet). This allows attached microphones to be used as a microphone input via I2S Audio. The chip is found on the ESP32-LyraT-Mini.

The ES7243 is a different chip from the ES7243E, with its own register map and a different default I²C address (0x13 instead of 0x10). Use this platform for boards whose schematic lists an ES7243 without the E suffix.

The I²C bus is required in your configuration as this is used to communicate with the ES7243. The chip only answers on I²C after it has received a clock on its MCLK input, so the I2S Audio bus it is attached to must set i2s_mclk_pin. The platform pulses that pin during setup and the I2S peripheral drives it afterwards.

# Example configuration entry
audio_adc:
  - platform: es7243

Configuration Variables

• mic_gain (Optional, enum): The gain applied to the ADC microphones. One of 1dB, 3.5dB, 18dB, 20.5dB, 22.5dB, 24.5dB, 25dB or 27dB. Defaults to 27dB.

• i2s_audio_id (Optional, ID): The ID of the I2S Audio bus whose i2s_mclk_pin clocks the chip. Required when more than one bus is configured.

• address (Optional, int): The I²C address of the driver. Defaults to 0x13.

• i2c_id (Optional): The ID of the I²C bus the ES7243 is connected to.

• All other options from Audio ADC.

Automations

All Audio ADC Automations are supported by this platform.

Configuration Examples

ESP32-LyraT-Mini:

i2c:
  sda: GPIO18
  scl: GPIO23

i2s_audio:
  - id: i2s_audio_bus
    i2s_lrclk_pin: GPIO25
    i2s_bclk_pin: GPIO5
    i2s_mclk_pin: GPIO0

audio_adc:
  - platform: es7243
    id: es7243_adc
    i2s_audio_id: i2s_audio_bus

microphone:
  - platform: i2s_audio
    id: lyrat_mic
    i2s_audio_id: i2s_audio_bus
    i2s_din_pin: GPIO26
    adc_type: external
    sample_rate: 16000
    bits_per_sample: 16bit

See Also

• Audio ADC Component
• ES7243E
• API Reference: es7243.h