Protocol decoder:am230x
Revision as of 19:59, 9 December 2014 by Uwe Hermann (talk | contribs)
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| Name | AM230x/DHTxx |
|---|---|
| Description | Aosong AM230x/DHTxx humidity/temperature sensor protocol |
| Status | supported |
| License | GPLv2+ |
| Source code | decoders/am230x |
| Input | logic |
| Output | am230x |
| Probes | SDA |
The am230x protocol decoder decodes the Aosong AM2301/AM2302/AM2303/DHT11 temperature and humidity sensor single-wire protocol.
Hardware
See the am230x directory for example capture files.
Models
| Model | Microcontroller | Temperature | Humidity |
|---|---|---|---|
| Aosong AM2301 | Unknown SOIC-10 | ? | ? |
| Aosong AM2302 | ST STM8S103F3 (8S103F3P6), SOIC-20 | analog | analog |
| Aosong AM2303 | ST STM8S103F3 (8S103F3P6), SOIC-20 | Dallas DS18B20 | analog |
| Aosong DHT11 | Unknown SOIC-14 | analog | analog |
Aosong AM2301
AM2301, top
AM2301, bottom
AM2301 PCB, open
AM2301 PCB, top
AM2301 PCB, bottom
Aosong DHT11
DHT11, top
DHT11, bottom
DHT11 PCB, open
DHT11 PCB, top
DHT11 PCB, bottom
Protocol
A custom single-wire protocol (not to be confused with the Dallas 1-Wire protocol!) is used to get the measured values from the sensor.
The actual payload consists of a humidity value, a temperature value, and a checksum.
Resources
- Aosong (vendor website)
- Adafruit: DHT sensor tutorial
- arduino.cc: DHTLib