@canossa Sorry for the late response.
yeah, since is so compact and you can get it for relatively cheap I opted in for the NRF52.
For home automation, I merged MySensors with Domoticz and it works for months now.
https://forum.mysensors.org/topic/7836/what-did-you-build-today-pictures/738
@TheoL Thanks for responding and sorry for my late reply.
I finally got an Arduino Nano working as a gateway with RFM69.
It required new/different logic converters as the ones I had apparently were not working correctly.
I can give the RFM69 3.3V power from the Nano, but as the Nano has 5V logic and the RFM69 cannot handle 5V logic as input (NSS, SCK, MOSI) , the logic converters are needed to protect the RFM69 module as also stated in the MySensors radio guide.
I must say that using NRF24 was much easier than using RFM69, but I will stick with RFM69 (433 MHz) for range reasons.
Although it should not be too difficult to make the MQTT Gateway with WiFi work on hardware and software level it is a bad idea on system level:
WiFi and MySensensor NRF24L01+ use the same 2.4 GHz band and with the antennas close a transmit from one will block the other and vice-versa.
@Tommas Hi, now I've posted a device for sale on Tindie, if it's still relevant for you https://www.tindie.com/products/avikmen/usb-rf-gateway-with-stm32-and-nrf24-in-case/
