CM2302 is a temperature and humidity composite sensor. It uses dedicated digital module acquisition technology and temperature and humidity sensing technology to ensure high reliability and excellent long-term stability. The sensor includes a capacitive wet sensor and a high-precision NTC temperature sensor connected to a high-performance 8-bit microcontroller, ensuring the product's excellent quality, fast response, anti-interference ability and cost efficiency. Each sensor is being calibrated in a highly accurate humidity calibration room. Compared to the DHT11, this sensor is more precise, more accurate and works in a bigger range of temperature/humidity, but its larger and more expensive.
Features:

1. ultra-low power consumption
2. long transmission distance
3. standard digital single bus output
4. excellent long-term stability
5. high-precision NTC

Specifications:

1. typical accuracy RH: +/- 2 % RH
2. operating range RH: 0 to 99.9 % RH
3. humidity response time: 5 sec
4. typical accuracy temperature: +/- 0.5 °C
5. operating range temperature: -40 to 80 °C
6. interface: 1 wire
7. supply voltage: 3.3 to 5.5 VDC
8. supply current: max 1.5 mA

vma345_tutorial.zip

vma345_dht_library.zip

wpse345a4v01.pdf

ce_rohs_open.pdf