Overview

• Name: AHTXX
• Description: Library for Aosong ASAIR AHT10, AHT15 & AHT20 Digital Humidity & Temperature Sensor I2C. Only tested on AHT10.
• Developed on
  1. Raspberry pi PICO RP2040
  2. SDK C++ compiler, arm-none-eabi-g++ (15:10.3)
  3. CMAKE , VScode

Features

Library for Aosong ASAIR AHT10, AHT15 & AHT20 Digital Humidity & Temperature Sensor I2C.

1. Supply voltage: 1.8v - 3.6v for AHT10, AHT15 & 2.0v - 5.5v for AHT20
2. Temperature range: -40°C..+85°C
3. Temperature resolution: 0.01°C
4. Temperature accuracy: ±0.3°C
5. Relative humidity range: 0%..100%
6. Relative humidity resolution: 0.024%
7. Relative humidity accuracy: ±2%**
8. I²C bus speed: 0Hz - 400KHz
9. Recommended polling frequency: 8sec - 30sec

Supports sensors features:

1. Read humidity
2. Read temperature
3. Soft reset with sensor initialization
4. The library returns an errors if a communication error occurs or if the calibration coefficient is off.

Connections

The Sensor uses I2C for communication's. Data is outputted (eg to a PC) via a USB. Can be set up for any I2C interface and bus speed. By default I2C0, GPIO16(SDATA) and GPIO17(SCLK) & 100kHz.

Files

The main.cpp contains tests showing library functions There is also an library (ahtxx.cpp and ahtxx.hpp),

Output

Data is outputted (eg to a PC) via a USB .