ESPHome nRF52 Firmware Updates

The nRF52 platform supports firmware updates via Over-the-Air (OTA) mechanisms. The only supported bootloader for OTA updates is MCUboot.

To flash firmware onto the device, you can use any of the tools or libraries listed in the Zephyr MCUmgr documentation. Firmware updates are also available via the ESPHome command-line interface. For flashing over BLE, the MCUmgr Web Tool provides a convenient browser-based interface.

# Example configuration entry
ota:
  - platform: zephyr_mcumgr

Configuration variables

transport (Optional, mapping): Specifies the transport method used by Zephyr MCUmgr for OTA updates. By default, Bluetooth Low Energy (ble: true) is enabled.

`transport`

Zephyr MCUmgr can operate over multiple transport protocols, which are selected via configuration options.

# Example configuration entry
ota:
  - platform: zephyr_mcumgr
    transport:
      ble: true
      hardware_uart: CDC

Configuration variables

ble (Optional, boolean): Enable Bluetooth Low Energy transport for MCUmgr OTA. Default false.
hardware_uart (Optional, enum): Select a hardware UART interface to use for MCUmgr OTA communication. This is used when updating devices over a serial interface rather than BLE. Options: CDC, CDC1, UART0, UART1.

Usage

To connect and update the device over BLE:

esphome upload h.yaml --device BLE

Or connect to a specific BLE address:

esphome upload h.yaml --device 00:11:22:33:44:55

To connect and update the device over serial:

esphome upload h.yaml

Or connect to a specific serial:

esphome upload h.yaml --device /dev/ttyACM0