CJMCU-6814 Gas Sensor Module Three-channel Gas No I2C MOS
This is a three-channel MEMS metal-oxide (MOS) gas sensor based on the MiCS-6814 core chip. It comes on a purple breakout board and features **pure analog output (no I2C)**; it is commonly used in DIY air quality projects involving Arduino, STM32, or Raspberry Pi.
Specification:
| CO |
Carbon monoxide channel analog output |
| NH3 | Ammonia channel analog output |
| NO2 | Nitrogen dioxide channel analog output |
| GND | Power ground |
| +5V | Power supply (must be a stable 5V; 4.9–5.1V) |
