CO2 Sensor plus Temperature, Humidity
Overview
SKU: ISXSNS-CO2-1
Combination sensor for CO2 level in parts-per-million (fresh indoor air is in the 400-600 ppm range), temperature in degrees celsius, and relative air humidity as a percentage. Commonly used to monitor indoor air quality. Digital serial UART output. Use with the Interstacks Serial block.
Technical Specifications
| Temperature Range | 0C – 55C, 32F – 131F (Accuracy: +/- 1°C within Range) |
| Humidity Range | 0 – 95% (Relative) |
| CO2 Range | 0 – 10,000 ppm (Accuracy: +/-50 ppm, +/- 3% of reading) |
Pinout
| Function | Pin # | Pin # | Function |
| Fresh Air Zero | 10 | 9 | Analogue Output |
| Nitrogen Zero | 8 | 7 | Sensor Tx (out) |
| GND | 6 | 5 | Sensor Rx (In) |
| GND | 4 | 3 | +3.3V |
| N/C | 2 | 1 | GND |
Additional Notes
An ASCII character data is sent twice per second via a serial byte stream over a UART running at 9600 baud. Must be connected to the Interstacks serial block (UART-RCV, DC-OUT, GND) to receive data.
A typical string sent by the sensor is: H 00345 T 01195 Z 00651\r\n
- H is the humidity (34.5%)
- T is the temperature (19.5 degrees celsius, the leading 01 is ignored)
- Z is the CO2 level in ppm (651 ppm)
- Designators H, T, and Z do have space characters padding them
- The string is terminated with a carriage return and linefeed