README.md

AHT20-For-Pico

C++ implementation of AHT20 for RP2040 Picos

Basic usage

1. Include header file
2. Add .cpp and .h to CMakeLists.txt under add_executable after main.cpp
3. Create AHT20 object
4. Initialise sensor with .init(sdaPort, sclPort)
   1. provide phyiscal pin numbers for I2C SDA and SCL ports
5. Trigger a measurement with .triggerMeasurement()
6. Read latest temperature (celsius) as float with .getTemp()
   1. temperature in farenheit can be read with .getTemp_f()
7. Read latest humidity as float with .getHumidity()

Example

include <stdio.h>
include pico/stdlib.h
include libraries/AHT20/AHT20.h
AHT20 aht20;
int temp;
int hum;

int main() {
    stdio_init_all();
    aht20.init(0,1);

    while (true) {
        sleep_ms(10000);
        aht20.triggerMeasurement();

        temp = (int)aht20.getTemp();
        hum = (int)aht20.getHumidity();

        printf("Temp: %iC \n", temp);
        printf("Humidity: %i%%\n", hum);
    }
}

Output

Temp: 23C
Temp: 74f
Humidity: 46%