Introduction
The AM2301A, also known as the DHT21 digital temperature sensor, is one of the most common in the range of DHT Temperature & Humidity sensors. It boasts a relatively high-temperature measurement accuracy of ±0.3℃ better than the DHT11 or DHT22, with a relative humidity accuracy of +/- 3%.
It keeps just 3 wires, containing power and ground, meaning just one digital pin is needed to interface it to a microcontroller. For Arduino development platforms the sensor is incredibly well kept by the DHT library available on the Arduino Playground website.
Features of AM2301A Temperature Sensor
- Accurate, durable, and high quality
- Ultra-low power
- No additional components
- Excellent long-term stability
- All calibration, digital output
- Completely interchangeable
- Long-distance signal transmission
- Relative humidity and temperature measurement
Pinout of AM2301A Temperature Sensor
Pin Description of AM2301A Temperature Sensor
| Pin color | Pin Name | Description |
| Red | Vcc | The power supply pin requires voltage from 3.5V to 5.5V |
| Yellow | Data | Output pin for both humidity and temperature through serial Data |
| Black | Ground | Connection of sensor to the system’s ground |
Specifications of AM2301A Temperature Sensor
| Model | AM2301 |
| Sensing period Average | 2s |
| Power | 3.3-5.2V DC |
| HUMI | 0~99.9% RH |
| TEMP | -40 ~ 80℃ |
| Precision | ±3% RH, ±0.5 ℃ |
| Output | Digital (1 wire) |
| Dimension | 60 x 27 x 14mm(L*W*H) |
Application of AM2301A Temperature Sensor
- To Measure the Temperature and Humidity.
- To Local the Weather Station.
- To Control the Automatic Climate.
- To Monitoring the Environment.
Datasheet of AM2301A Temperature Sensor
Download AM2301A Temperature and Humidity Sensor Datasheet from the link given below.