Add comment on I2C pin connections

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bzi 2019-02-21 21:06:29 +01:00
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* Currently supported sensors:
* - digital pin D2: DHT22 temperature and humidity sensor
* - analog pin A0: MQ135 gas and air quality sensor
*
* Connect the ESP8266 D1 to ATMEGA A5 and D2 to A4 for I2C communcation.
*
* (C) 2019 Macrocell - Environmental Sensing Solutions (MESS)
* proudly presented by Macrocell - FPGA Innovators