 This is me designing the tester for our new RP2040 feathers with radio modules on the end. This is a Laura 900 megahertz RFM95, we've also got the version over here, or you have an antenna soldered on, the RFM69 which is a packet radio version. So the tester brains uses the Pico with an SD card which has the firmware and then it connects to one of the modules. I usually would use like a breakout but I only have a feather wing on hand, I gotta go to the office and grab one of the modules that matches the right frequency. And then over here is the feather and so what it does, if you back out a bit we can see everything, the tester programs the test firmware onto here which tests all the GPIO and checks the voltages and everything and then communicates back and forth with this radio to make sure that the radio and the antenna is working and you can see I've got a little faux antenna, just a basic antenna that connects to the Pogo pin here and then on success you get ok test.