
U104 · M5Stack

Unit CO2L is a digital air CO₂ concentration detection unit with a low power consumption mode for single measurements. It is equipped with Sensirion's SCD41 sensor and a power step-down circuit, utilizing I2C communication. This unit is suitable for measuring air environmental conditions, with a typical accuracy for CO₂ measurement of ± (40 ppm + 5% of reading), and a range of 400 ppm ~ 5000 ppm. It also measures ambient temperature and humidity. Features CO2 concentration detection… (M5Stack U104)
| Part number | U104 |
|---|---|
| Manufacturer | M5Stack |
| Category | Audio › Amplifiers & Audio Modules |
| Pins | 4 |
CO2L Unit with Temperature and Humidity Sensor (SCD41) pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | SCL | input | |
| 2 | SDA | bidirectional | |
| 3 | 5V | power | |
| 4 | GND | ground |
Schematic symbol and footprint
Schematic symbol
Footprint: Grove HY2.0 4-pin through-hole, 2.0 mm pitch — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
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