Arduino Mega with Wemos D1 mini as Wifi shield. - Project Guidance - Arduino Forum
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Hi, So I have a Arduino Mega hooked upto a Wemos D1 Mini, Im using the Wemos as a Wifi shield as I wanted to stop using ethernet for more simplicity. I have the devices connected on SPI, I actually use the SPI header on the Arduino but couldn't get Fritzing to connect to it so did the pins instead I also have no SlaveSelect. I use Jiri's library. The Arduino is powered via the USB port, everything is working fine, however I read about issues with 5v tolerance for ESP8266 GPIO so I wanted
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