AHT20 Driver for CH32V003 with ch32fun

This project demonstrates how to use the AHT20 temperature and humidity sensor with the CH32V003 microcontroller with CH32fun framework. The project includes initialization of the I2C bus, reading data from the AHT20 sensor, and printing the temperature and humidity values to the console.

Features

• Temperature and humidity measurement using AHT20 sensor
• I2C communication with the AHT20 sensor
• Periodic data reading and console output

Hardware Requirements

• CH32V003 microcontroller
• AHT20 temperature and humidity sensor module

Wiring

• Connect PC1 to module SDA pin
• Connect PC2 to module SCL pin
• Connect VDD to power supply (3.3 to 5V)
• Connect GND to common ground

Usage

• Init I2C bus with i2c_init()
• Declare variable of AHT20Data to store result
• Run AHT20_read() to fetch sensor data

Example Code

The main application code, including initialization, data reading, and console output.

// filepath: /home/pavlo/Documents/PlatformIO/Projects/AHT20-driver/src/main.c
#include "ch32fun.h"
#include "aht20.h"

int main() {
    AHT20Data data;

    SystemInit();

    i2c_init();

    while (1)
    {   
        if(AHT20_read(&data) == AHT20_OK) {
            printf("Temperature: %d Humidity: %d\n", (int)data.temperature, (int)data.humidity);
        }
        else {
            printf("Error reading AHT20 sensor\n");
        }
        Delay_Ms(1000);
    }
}

License

This project is licensed under the MIT License.