Is it possible to use a W5100 shield on a Mega2560 that has a prototype shield on top? I am not sure, because the ICSP headers are moved in a corner of the proto shield.
Battery node radio choice
not working Ethernet Gateway (sensebender and/or nano gateway)
fody weather station
New STM32 board with provision for NRF24L01 and ESP8233 boards
Not working serial gateway connecting sensor
nRF52832 and NRF2401
Sonoff 433 bridge