DHT-11 DHT-22 RHT-03

온도/습도 센서 인데..

검색하다 보니 차이가 있... 다?

DHT11

Ultra low cost

3 to 5V power and I/O

2.5mA max current use during conversion (while requesting data)

Good for 20-80% humidity readings with 5% accuracy

Good for 0-50°C temperature readings ±2°C accuracy

No more than 1 Hz sampling rate (once every second)

Body size 15.5mm x 12mm x 5.5mm

4 pins with 0.1" spacing

DHT22

Low cost

3 to 5V power and I/O

2.5mA max current use during conversion (while requesting data)

Good for 0-100% humidity readings with 2-5% accuracy

Good for -40 to 125°C temperature readings ±0.5°C accuracy

No more than 0.5 Hz sampling rate (once every 2 seconds)

Body size 15.1mm x 25mm x 7.7mm

4 pins with 0.1" spacing

[링크 : https://learn.adafruit.com/dht/overview]

[링크 : http://cdn.sparkfun.com/datasheets/Sensors/Weather/RHT03.pdf]

RHT03 (also known by DHT-22)

[링크 : https://www.sparkfun.com/products/10167]

AM2302가 DHT22 대응인 듯

그냥 .. DHT11만 보더라도 상당히 불안정하게 값이 읽혀온다.

[링크 : http://www.kandrsmith.org/RJS/Misc/calib_dht22_dht11_sht71.html] 벤치마크?

아무튼.. DHT-11은 저가형에 정밀하지 못한 녀석

DHT-22/RHT03은 정밀한 녀석으로 결론...