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Silicon Labs Firmware flashing utility

The silabs-flasher utility allows to flash products using the Silicon Labs Wireless Gecko Series 1 and 2 chips. It makes use of the zigpy bellows library to communicate using the EmberZNet Serial Protocol over serial port.

Note: There is also a more capable utilty called Universal Silicon Labs Flasher.

Install

Silicon Labs Flasher is available from PyPI:

$ pip install silabs-flasher

To use GPIOs to reset the chip (useful on Home Assistant Yellow) make sure to install with gpiod from PyPI as extra dependency:

$ pip install "silabs-flasher[gpio]"

Usage

Use the info command to check communication with the device and get information about the current firmware and the bootloader:

$ silabs-flasher --device /dev/ttyUSB4 info
Manufacturer: 
Board name: 
EmberZNet version: 6.7.9.0 build 405
bootloader version: 0x1902, nodePlat: 0x04, nodeMicro: 0x18, nodePhy: 0x0f

The firmware can be flashed using the flash command:

$ silabs-flasher --device /dev/ttyUSB4 flash --firmware ncp-uart-sw_679_115200.gbl 
Trying to connect using EZSP...
Launching bootloader in mode recovery mode via EZSP.
Bootloader detected successfully.
Bootloader version: 1.9.2
Starting firmware upload...
Firmware update  [####################################]  100%          
Bootloader reported successful upload.

To reset the chip using GPIO use the following arguments:

$ silabs-flasher --device /dev/ttyAMA1 --baudrate 115200 flash \
                 --no-ezsp-reset --cm4-gpio-reset \
                 --firmware NabuCasa_EZSP_v6.10.3.0_PA32_ncp-uart-hw_115200.gbl