Grove - CO2 & Temperature & Humidity Sensor - SCD41
Sensirion SCD41 photoacoustic NDIR sensor measuring CO2, temperature, and humidity simultaneously over I2C via Grove connector. Compact form factor with adjustable power modes for battery-powered deployments.
Pinout
- VCC1
Grove power input. Seeed SCD41 wiki specifies working voltage 2.4V~5V and direct Grove connection table uses 5V / red wire.
Type · PowerVoltage · 2.4V~5V working voltage; 5V shown in Seeed direct Grove wiring table - GND2
Ground return for the Grove connector. Seeed direct wiring table lists GND / black wire.
Type · GroundVoltage · 0V - SDA3
I2C serial data on the Grove connector. Seeed direct wiring table lists SDA / white wire and the page identifies the module as I2C address 0x62.
Type · I2C - SCL4
I2C serial clock on the Grove connector. Seeed direct wiring table lists SCL / yellow wire.
Type · I2C
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VCC | 1 | Power | Grove power input. Seeed SCD41 wiki specifies working voltage 2.4V~5V and direct Grove connection table uses 5V / red wire. | 2.4V~5V working voltage; 5V shown in Seeed direct Grove wiring table |
| GND | 2 | Ground | Ground return for the Grove connector. Seeed direct wiring table lists GND / black wire. | 0V |
| SDA | 3 | I2C | I2C serial data on the Grove connector. Seeed direct wiring table lists SDA / white wire and the page identifies the module as I2C address 0x62. | |
| SCL | 4 | I2C | I2C serial clock on the Grove connector. Seeed direct wiring table lists SCL / yellow wire. |
Pin details
4 connections- VCC1
Grove power input. Seeed SCD41 wiki specifies working voltage 2.4V~5V and direct Grove connection table uses 5V / red wire.
PowerVoltage · 2.4V~5V working voltage; 5V shown in Seeed direct Grove wiring table - GND2
Ground return for the Grove connector. Seeed direct wiring table lists GND / black wire.
GroundVoltage · 0V - SDA3
I2C serial data on the Grove connector. Seeed direct wiring table lists SDA / white wire and the page identifies the module as I2C address 0x62.
I2C - SCL4
I2C serial clock on the Grove connector. Seeed direct wiring table lists SCL / yellow wire.
I2C
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, GND, SDA, SCL. Schematik maps them to your board in the app.
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