mqopen
Hardware
Backbone
Processing
Development
Sidebar
sensors:dht22
Table of Contents
DHT22 Sensor
DHT22 is simple and cheap digital temperature and humidity sensor. It communicates over customized 1-wire bus at TTL logic. DHT22 provides wider measurement range and better accuracy than DHT11 variant.
Sensor characteristics:
| Sensor type | Humidity, Temperature |
|---|---|
| Humidity range | 0% - 100% RH |
| Humidity accuracy | 2% - 5% RH |
| Temperature range | -40 - 80 °C |
| Temperature accuracy | 0.5 °C |
| Interface | Custom |
| Working voltage | 3.3 - 6 V |
http://www.aosong.com/en/products/details.asp?id=117
Sensor for measuring temperature and humidity.
Build instructions
Solder DHT22 sensor to piece of prototyping board.
Bill of materials
| Part | Pcs |
|---|---|
| DHT22 sensor | 1 |
| 2 x 8 cm prototyping board | 1 |
| Telephone cable | 1 |
| RJ11 6P4C plug | 1 |
3D printed case
Download STL files from GitHub repository.
Bill of materials
| Part | Pcs |
|---|---|
| M4 x 16 mm crew, flat head | 4 |
| M4 nut | 4 |
PCB modifications
Solder 1K pull-up resistor to appropriate solder pad on data pin.
sensors/dht22.txt · Last modified: 2016/05/19 07:17 by buben
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
