Adafruit SCD-30 NDIR True CO2, Temperature & Humidity Sensor
Pinout
- VINheader / STEMMA QT
Power input to onboard regulator
Type · PowerVoltage · 3-5VDC - 3Voheader
3.3V output from regulator
Type · PowerVoltage · 3.3V output up to 100mA - GNDheader / STEMMA QT
Common ground for power and logic
Type · GroundVoltage · 0V - SCLheader / STEMMA QT
I2C clock, level shifted with 10K pullup
Type · I2CVoltage · 3-5V logic - SDAheader / STEMMA QT
I2C data, level shifted with 10K pullup
Type · I2CVoltage · 3-5V logic - RDYheader
Data ready output, high when data is ready
Type · SignalVoltage · logic output
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VIN | header / STEMMA QT | Power | Power input to onboard regulator | 3-5VDC |
| 3Vo | header | Power | 3.3V output from regulator | 3.3V output up to 100mA |
| GND | header / STEMMA QT | Ground | Common ground for power and logic | 0V |
| SCL | header / STEMMA QT | I2C | I2C clock, level shifted with 10K pullup | 3-5V logic |
| SDA | header / STEMMA QT | I2C | I2C data, level shifted with 10K pullup | 3-5V logic |
| RDY | header | Signal | Data ready output, high when data is ready | logic output |
Pin details
6 connections- VINheader / STEMMA QT
Power input to onboard regulator
PowerVoltage · 3-5VDC - 3Voheader
3.3V output from regulator
PowerVoltage · 3.3V output up to 100mA - GNDheader / STEMMA QT
Common ground for power and logic
GroundVoltage · 0V - SCLheader / STEMMA QT
I2C clock, level shifted with 10K pullup
I2CVoltage · 3-5V logic - SDAheader / STEMMA QT
I2C data, level shifted with 10K pullup
I2CVoltage · 3-5V logic - RDYheader
Data ready output, high when data is ready
SignalVoltage · logic output
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: VIN, 3Vo, GND, SCL, SDA, RDY. Schematik maps them to your board in the app.
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