Hardware setup

Hardware setup

Connections

• The sensor using I2C bus, SDA and SCL pins must be pulled up via 10K resistors from 3.3V according to iAQ Core C's datasheet! See schematic below!

• I2C bus pins on ESP12E/F boards are GPIO5 - SCL and GPIO4 - SDA. If you are using Wemos D1 mini, I2C pins are SCL - D1 and SDA - D2!

• This sensor also has an option for resetting to factory default. Long pressing for 10 seconds a button connected to GPIO0 and GND will reset the sensor!

Schematic