measure-raw
wayland/sgp40-air-quality-sensor/measure-raw
Make a raw gas measurement.
measure-raw
@/measure-raw
Make a raw gas measurement.
DEV@/sgp40-device
An SGP40 device.
TempCnumber
Temperature (Celsius). Used in temperature compensation. Connect to a temperature sensor or specify a value a temperature sensor is not available.
RHnumber
Relative humidity (%). Used in humidity compensation. Connect to a relative humidity sensor or specify a value if a sensor is not available.
UPDpulse
Update.
Donepulse
Pulse on measurement.
Rawnumber
The current raw gas measurement
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;
auto sensor = getValue<input_DEV>(ctx);
float tempC = getValue<input_TempC>(ctx);
float rh = getValue<input_RH>(ctx);
auto raw = sensor->measureRaw(tempC, rh);
emitValue<output_Raw>(ctx, raw);
emitValue<output_Done>(ctx, 1);
}
}