AM2301.md

AM2301/AM2302 (DHT21/DHT22) temperature and humidity sensor

??? tip "This feature is included in tasmota, tasmota32, tasmota-knx and tasmota-display binaries" When compiling your build add the following to user_config_override.h: c++ #ifndef USE_DHT #define USE_DHT // Add support for DHT11, AM2301 (DHT21, DHT22, AM2302, AM2321) and SI7021 Temperature and Humidity sensor (1k6 code) #endif

AM2301 driver supports AM2301 (DHT21), AM2302 (DHT22), AM2320 and AM2321 temperature and humidity sensors. Introduced in Tasmota through Sonoff AM2301 accessory for Sonoff TH.

This driver is ONLY for single wire implementations of the sensor.

For AM2301B I^2^C model, refer to AHT2x driver.

Configuration

Wiring

AM2301	ESP
-	GND
OUT	GPIOx
+	3.3V - 5.2V (5V is recommended)

AM2320	ESP
-	GND
OUT (SDA)	GPIOx
+	3.3V - 5.2V (5V is recommended)
SCL	GND

Tasmota Settings

In the Configuration -> Configure Module page assign:

• GPIOx to AM2301

After a reboot webUI will display temperature and humidity measured.

Sensor sends a tele/%topic%/SENSOR JSON response:

{
  "Time": "2019-01-01T00:00:00",
  "AM2301": {
    "Temperature": 24.6,
    "Humidity": 58.2
  },
  "TempUnit": "C"
}

Commands

TempOffset can be used for calibrating the measured temperature. This setting affects all temperature sensors on the device.

Wemos DHT Shield

Like the Wemos DHT11 shield specs the DATA OUT pin of Wemos DHT22 is connected to D4 of the Wemos.

Tasmota Settings

In the Configuration -> Configure Module page assign:

1. GPIO2 to AM2301 (2)

Sensors

Read more about differences between sensors.