UPDATE 1: DIY Sonoff RF Bridge with Sonoff RF

The Sonoff RF I have ordered arrived. It is similar to Sonoff Basic in term of the layout. Flashing the device with Tasmota firmware is easy. In Tasmota website, the instruction recommended soldering a jumper at R21. I discovered that this is not necessary. To start up the ESP in programming mode, I only need to short the inner pin of R21 to ground when powering up the ESP.

After I have flashed the device, I was trying to pair with my RF433 with pre-defined code but it does not go into pairing mode and I also noticed the ESP01 randomly throws errors. I suspected that the FTDI serial adapter may not have enough current to power both the ESP and the RF board. I put back the casing, powered the device using AC and cleared the existing code. I paired the Sonoff RF with my fixed code RF433 transmitter and using the DIY Sonoff bridge Web UI to trigger. Presto! The bridge is able to switch on/off the Sonoff RF.

That is a promising start for the DIY bridge. More exciting integrations with other RF433 codes may be possible in the future.

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