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.
Grove power input. Seeed SCD41 wiki specifies working voltage 2.4V~5V and direct Grove connection table uses 5V / red wire.
Ground return for the Grove connector. Seeed direct wiring table lists GND / black wire.
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 serial clock on the Grove connector. Seeed direct wiring table lists SCL / yellow wire.
| 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 | signal | 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 | signal | I2C serial clock on the Grove connector. Seeed direct wiring table lists SCL / yellow wire. |
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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