@Danielo-Rodríguez yes, that is correct

@pw44 and so, my first assbled gateway looks like: [image: 1597751792977-img_6624-resized.jpg] [image: 1597751803145-img_6623-resized.jpg] [image: 1597751823802-img_6634-resized.jpg] [image: 1597751837693-img_6633-resized.jpg] [image: 1597751850496-img_6632-resized.jpg] Now i will try a more robust version, with external antenna.

It might be possible to power the Arduino off the output pin. Since they are dirt cheap I would just test it. But like the others I would suggest to use the interrupts of pin 2 and 3. For my battery powered 3.3v pro mini I use 3.3v pir sensors without the voltage regulator. The standard 5v pir needs at least 4.5v just to step it down internally to 3.3V. On these I had problems with voltage stability because I stepped it up to 5V. Also the battery lifetime was poor. With the 3.3v pir version this thing runs for months. With the solar panel on top maybe forever.

@danielo-rodríguez said in Node not working after adding some wires and a capacitor: Which would be a good fit? It depends on your environment. In rural environments you could try the lower channels. The higher channels (around 100 and up) are outside the wifi range, but I've seen clones performing worse at high frequencies. As a reference, this post discusses Wifi vs nRF24 channels: https://forum.mysensors.org/topic/4721/nrf-frequency-and-channels