Includes moisture sensor and temperature measuring element
Temperature range: -40-80°C (±2%RH error)
Interface sequence: VCC, GND, S
The DHT22 Temperature and Humidity Sensor is a compound digital temperature and humidity sensor which outputs calibrated digital signals. DHT22 includes a capacitive moisture sensor and a NTC temperature measuring element which is connected to a high-performance 8-bit microcontroller.
I used some of these DHT22 sensors to add temperature and humidity displays to my Raspberry Pi web cams. Couldn't be simpler, just three wires and the DHT22 Python library from Adafruit. Most vendors charge $8 to $10 for just the bare sensor, but these come on a PCB with mounting holes and a wired connector. The PCB has an I2C pull-up resistor and a decoupling cap, so it makes for a very clean solution.
J
Justin
Work Great!
Used it with arduino uno to measure the temp/hum of my automated greenhouse tech project and it worked perfectly!
m
maryam
does the job nice to work on the pcb
it is quite easy to assemble and works well
M
Murray
Works well
Seemed to work as expected. For the one-wire data interface though, you have to be pretty exact with the timing, i.e. able to resolve pulse changes on the order of about 10 microseconds.
