Gravity: CCS811 Air Quality Sensor
Air quality sensor based on the CCS811 chip measuring eCO2 and TVOC levels. Low power consumption; suited for air purifiers and ventilation control.
Pinout
- +VCCPinout row 1
Positive supply.
Type · Power - -GNDPinout row 2
Ground return.
Type · Ground - CSCLPinout row 3
IIC clock line.
Type · I2C - DSDAPinout row 4
IIC data line.
Type · I2C - 3V3Pinout row 5
3.3V pin.
Type · Power - WAKEPinout row 6
Wake switch pin: awake low, sleep high.
Type · Control - INTPinout row 7
Interrupt pin, low active.
Type · GPIO - RSTPinout row 8
Reset pin, low active.
Type · Control - ADDR_SELPinout row 9
IIC address select.
Type · GPIO
| Pin | Position | Type | Function |
|---|---|---|---|
| +VCC | Pinout row 1 | Power | Positive supply. |
| -GND | Pinout row 2 | Ground | Ground return. |
| CSCL | Pinout row 3 | I2C | IIC clock line. |
| DSDA | Pinout row 4 | I2C | IIC data line. |
| 3V3 | Pinout row 5 | Power | 3.3V pin. |
| WAKE | Pinout row 6 | Control | Wake switch pin: awake low, sleep high. |
| INT | Pinout row 7 | GPIO | Interrupt pin, low active. |
| RST | Pinout row 8 | Control | Reset pin, low active. |
| ADDR_SEL | Pinout row 9 | GPIO | IIC address select. |
Pin details
9 connections- +VCCPinout row 1
Positive supply.
Power - -GNDPinout row 2
Ground return.
Ground - CSCLPinout row 3
IIC clock line.
I2C - DSDAPinout row 4
IIC data line.
I2C - 3V3Pinout row 5
3.3V pin.
Power - WAKEPinout row 6
Wake switch pin: awake low, sleep high.
Control - INTPinout row 7
Interrupt pin, low active.
GPIO - RSTPinout row 8
Reset pin, low active.
Control - ADDR_SELPinout row 9
IIC address select.
GPIO
Start wiring
I2C · Analog · UART · 3.3 – 5 V · Breakout
Waveshare lists MQ-2 for combustible gases and smoke, MQ-3 for alcohol, and MQ-135 for mixed indoor pollutants such as NH3, NOx, alcohol,…
Module pins: +/VCC, 3V3, -/GND, C/SCL, D/SDA. Schematik maps them to your board in the app.
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