Protocol decoder:am230x
 | |
| 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
Device, top
Device, bottom
Device PCB, open
Device PCB, top
Device PCB, bottom
Aosong AM2302
Device, top
Device, bottom
PCB, top
PCB, bottom
STM8S103F3
Sensor
Debris
Aosong AM2303
Device, top
Device, bottom
PCB, top
PCB, bottom
DS18B20
Debris
Aosong DHT11
Device, top
Device, bottom
Device PCB, open
Device PCB, top
Device 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