The antenna pin is connected to a female sma connector.
It commes with two 3dbi male sma antennas. But you can change it to any 433Mhz antenna you like. With a SMA/BNC adapter you could also use those antennas (of course in this case the hole in the top case has to be a little bigger).
Those look like a customised pcbs to put all the components together? Could you share how you got them?
Would love to see how you RF + IR prototype looks like
I’m now also able to flash the Sonoff RF Bridge with OpenMqttGateway.
You may ask yourself why I want to offer flashed Sonoff RF Bridges when I already have the DIY OMG IR/RF/BLE/Led device.
Well first of all if someone only wants RF (in an industrial case) the Sonoff RF may be the better choice. And because I only need to flash it and save a lot of time soldering and making the device it will be cheaper.
So I think it’s nice to have this option too.