Instructions

Connecting the Air Quality Sensor (Raspberry Pi 2/3/4)
If you have a Raspberry Pi 2, 3, 4, then you will need the Raspberry Leaf and some
female to male jumper wires to connect the Air Quality Sensor board to your
Raspberry Pi.
WARNING: Reversing the power leads or connecting the Air Quality Sensor to
5V rather than the 3V pin of the Raspberry Pi is likely to break the sensor and
may damage your Raspberry Pi. So, please check the wiring carefully before
powering on your Raspberry Pi.
Start by fitting the Raspberry Leaf over your Raspberry Pi's GPIO pins so that you
can tell which pin is which. The template can fit either way around, so make sure
you follow the diagram below.
Next you are going to connect four leads between the Raspberry Pi's GPIO pins
and the Air Quality board like this:
Raspberry Pi Pin (as
labelled on the Leaf)
Air Quality Board (as
labelled on connector)
Suggested wire color.
GND (any pin marked
GND will do)
GND Black
3.3V 3V Red
14 TXD PI_TXD Orange
15 RXD PI_RXD Yellow
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