![]() ![]() Follow this 4 step process:ġ) Connect your 3.3V FTDI programmer to your computerģ) Toggle the switch to apply power to the Sonoff circuitĤ) Then, you can release the Sonoff button To flash a new firmware to your Sonoff, you have to boot your Sonoff in flashing mode. This prevents you to make wrong connections between the FTDI and the Sonoff in the future. I used hot glue to glue the ends of the wires together. I’ve added a toggle switch in the power line, so that I can easily turn the Sonoff on and off to flash a new firmware without having to unplug the FTDI module. Warning: uploading a custom firmware is irreversible and you’ll no longer be able to use the app eWeLink. ![]() Use the schematics provided as a reference. You need an FTDI module to upload a new firmware to your Sonoff. I’ve soldered 4 header pins, so that I can easily connect and disconnect wire cables to my Sonoff device. The Sonoff is meant to be hacked, and you can see clearly that these connections were left out, so that you can solder some pins and upload a custom firmware. Make sure you disconnect your Sonoff from mains voltage. First, watch the step by step video tutorial below If you don’t have a Sonoff yet, you can get one for approximately $5 – visit Maker Advisor to find the best price. I recommend that you read my previous post to get familiar with the Sonoff. We also have additional resources that describe how to flash a custom firmware to the Sonoff device using an FTDI programmer and the Arduino IDE. In this post, you’re going to learn how to flash custom firmware in the Sonoff device, so that you can control it with your own web server. ![]()
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