There is a gap on the market. I couldn't find a WiFi shield with SPI connected ESP8266. It would be connected the same way like Ethernet shields and WiFi shield. I know two libraries with standard arduino networking API (Server and Client implementation) which support SPI connection. The arduino.or…

ESP8266 SPI WiFi Shield ("nice to have")

Juraj February 12, 2018, 8:52am 6

SPI connection with level conversion and mutual reset control (the white wire is needed only for WiFi Link firmware)

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