Gravity: AHT20 Temperature and Humidity Sensor
The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features a standard I2C interface and a wide voltage supply of 2V-5V. With the simple peripheral circuit, it performs stably even in harsh environments in the measuring range of -40℃ ~ ＋85℃.
This sensor can be widely used for measuring the environmental temperature and humidity of home electronic equipment, the temperature and humidity of automobiles and more.
This version uses a 4-pin Gravity connector and comes complete with a 4-pin Gravity interface cable. No soldering required!
Connection Example – Arduino
Features
- Digital output, I2C interface
- Excellent long-term stability
- Fast response, strong anti-interference, and adaptability
- Gravity interface, simple wiring, no soldering required
Specifications
Module Parameters
- Operating Voltage: DC2V-5V
- Output Signal: I2C
- I2C Address: 0x38
- Dimension: 30mm×20.5mm/1.18×0.81″
AHT20 Chip Parameters
Relative Humidity
- Resolution: 0.024 %RH
- Accuracy Error: ±2 %RH
- Repeatability: ±0.1 %RH
- Hysteresis: ±1 %RH
- Non-linear: ±0.1 %RH
- Response Time: 8S
- Operating Range: 0~100 %RH
- Long-term Drift: ＜0.5 %RH/yr
Temperature
- Resolution: 0.01℃
- Accuracy Error: ±0.3℃
- Repeatability: ±0.1℃
- Hysteresis: ±0.1℃
- Response Time: minimum 5S, maximum 30S
- Operating Range: -40℃~85℃
- Long-term Drift: ＜0.04℃/yr
Package Contents
- 1x Gravity: AHT20 Temperature and Humidity Sensor
- 1x Gravity 4-pin I2C/UART Sensor Cable
Resources
- Product wiki
- DFRobot AHT20 Library
- Dimensions
- Circuit Diagram SCH
- 2D Dimensions
- 2D CAD_Dimensions
- 3D STP
Pinout
| Pin | Function | Description |
| + | Positive Power Supply | Power Supply: DC 2V~5V |
| – | Negative Power Supply | — |
| SCL | I2C Clock Line | — |
| SDA | I2C Data Line | — |
