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ESP32 Hosted

ESP32 Hosted (ESP-Hosted-MCU) is a solution that allows you to use ESP32 modules as communication co-processors. This solution provides wireless connectivity (Wi-Fi and Bluetooth) to the host module, enabling it to communicate with other devices.

# Example configuration entry
esp32_hosted:
  variant: ESP32C6
  reset_pin: GPIOXX
  cmd_pin: GPIOXX
  clk_pin: GPIOXX
  d0_pin: GPIOXX
  d1_pin: GPIOXX
  d2_pin: GPIOXX
  d3_pin: GPIOXX
  active_high: true
  sdio_frequency: 10MHz


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

Configuration variables

Section titled “Configuration variables”

  • variant (Required, string): The variant of the ESP32 co-processor that is used by the host. One of ESP32, ESP32S2, ESP32S3, ESP32C2, ESP32C3 and ESP32C6.

  • clk_pin (Required, Pin): The SDIO clock pin.

  • cmd_pin (Required, Pin): The SDIO command pin.

  • d0_pin (Required, Pin): The SDIO d0 pin.

  • d1_pin (Required, Pin): The SDIO d1 pin.

  • d2_pin (Required, Pin): The SDIO d2 pin.

  • d3_pin (Required, Pin): The SDIO d3 pin.

  • slot (Optional, int): The SDIO slot number. Defaults to 1.

  • reset_pin (Required, Pin): The reset pin of the co-processor.

  • active_high (Required, boolean): If enabled, the co-processor is active when reset is high. If disabled, the co-processor is active when reset is low.

  • sdio_frequency (Optional): Set the speed of communication between the master and the slave. If you experience loss of communication, or reboots, then try reducing this value. The value can be between 400KHz and 50MHz, with a default of 40MHz.

Updating co-processor firmware

Section titled “Updating co-processor firmware”

You can update the firmware on your ESP32 co-processor using the Esp32 Hosted platform. This allows you to deploy firmware updates to the co-processor without manually reflashing it.

See Also

Section titled “See Also”