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An IC that offers Wi-Fi networking compatible with b/g/n standards. It also has integrated TCP/IP protocol stack. Extremely popular along IoT community as a low cost and powerful board.

1 vote
1 answer
2k views

Wemos D1 won't work with MH-Z19B (CO2 sensor)

I would like to connect a CO2 sensor to the Wemos D1. I would like it to work via UART (RX, TX) and not the PWM pin. I've encountered numerous libraries on Github, but I can't seem to get it working. …
Mark D's user avatar
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