For plan A (Raspi gateway) I am still waiting for the new radio modules. I'm not scrapping this plan yet...
Regarding plan B (ethernet gateway), I am still confused regarding which pins to use and how to make it in the sketch:
On the left are the pins used in the Ethernet Gateway page, with a nano, a W5100 and the NRF24L01+ radio. Also, the MY_RF24 and MY_SOFT_SPI commands in the original sketch.
On the right, the RF-NANO, W5500 and the NRF24L01+ radio I am trying to use. The pins of the radio are fixed, as both are in the same module:
Is the following correct?
(#1) the MY_RF24_CS_PIN is now pin 9 while MY_RF24_CE_PIN is the default one of the nano (pin 10, SS?) so it can be ommited (?).
(#2) the W5500 pins are the ones that have to be moved now. MISO, MOSI and SCK are going to pins 16, 15 and 14 with MY_SOFT_SPI (I am assuming the W5500 supports software SPI, I read yesterday that not all modules do)
(#3) where and how goes the SS pin of the W5500??? MY_SOFT_SPI_CE_PIN exists? Is this what you mean with your comment, @neverdie?
All this is really exciting, but I still have a lot to learn. Apologies again for the 'dumb' questions...