read

wayland/ahtx0/read

Read relative humidity and temperature.
read
@/read
Read relative humidity and temperature.
DEV@/ahtx0-device
An AHTX0 device.
UPDpulse
Update. Pulse triggers read.
read
DEV
UPD
RH
Temp
Done
Donepulse
Pulse on read.
Tempnumber
Temperature (°C).
RHnumber
Relative humidity (%).
To use the node in your project you should have the wayland/ahtx0 library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.

C++ implementation

#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD

node {

    void evaluate(Context ctx) {
        // The node responds only if there is an input pulse
        if (!isInputDirty<input_UPD>(ctx))
            return;

        sensors_event_t humidity, temp;

        auto sensor = getValue<input_DEV>(ctx);
        sensor->getEvent(&humidity, &temp);
        
        emitValue<output_RH>(ctx, humidity.relative_humidity);
        emitValue<output_Temp>(ctx, temp.temperature);
        emitValue<output_Done>(ctx, 1);
    }
}