The code that made it possible to have sensors directly on the GW, is only available in development branch, and haven't been migrated to master branch.
You could always emulate the serial protocol on the GW your self, and inject that in the sensor data stream. But depending on the MCU you are using, you might run your head against the flash size wall..
@sundberg84 Yes, but I wonder if it will also work if I use the regular (round) THT pads from the Pro Mini (as the cheapest and most widely found Pro Minis seem to be like these)
I'll probably just try it I guess, but of course have to adapt my PCB accordingly to get the castellated half holes. Hope my PCB manufacturer knows what to do with the KiCAD file.
Pro Mini 3.3V 8M 5V 16M atmega328 Replace ATmega128 Arduino Compatible Nano New
It's not a perfect pin-out match. You should definitely check out this thread:
But you're right, it's great for beginners. That's why it forms the basis of the Candle project.