CJMCU-811

Project CJMCU-811
Playing around with a breakout board for the CSS-811 IC
Status	Initializing
Contact	bertrik
Last Update	2018-12-30

Introduction

I bought this board from Aliexpress, it's a breakout board for the AMS CCS-811. The CCS-811 is an ultra-low power digital gas sensor for monitoring indoor air quality.

The datasheet can be found here.

Hardware

Pins on the breakout board:

• VCC this is directly connected to the IC (there is no voltage regulator on board), connect this to 3.3V
• GND to ground obviously
• SCL signal from I2C
• SDA signal from I2C
• WAK this needs to be low (!) in order for the chip to be active
• INT can be left unconnected
• RST can be left unconnected
• ADD can be left unconnected (?)

My board was apparently configured at I2C address 0x5A. I'm wiring it up to a Wemos D1 mini board with an ESP8266.

Software

I found two libraries:

• Adafruit CCS811 Library
• SparkFun CCS811 Arduino Library