read
wayland/sht2x-rh-temp/read
Measure relative humidity and temperature.
read
@/read
Measure relative humidity and temperature.
DEV@/sht2x-device
An SHT2x device.
UPDpulse
Update. Triggers new read.
Donepulse
Pulse on read.
Errorbyte
Error code: 00h=OK, 81h=WRITECMD, 82h=READBYTES, 83h=HEATER_OFF, 84h=NOT_CONNECT, 85h=CRC_TEMP, 86h=CRC_HUM, 87h=CRC_STATUS, 88h=HEATER_COOLDOWN, 89h=HEATER_ON.
Tempnumber
Temperature (°C).
RHnumber
Relative humidity (%).
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);
sensor->read();
uint8_t errorCode = sensor->getError();
emitValue<output_Error>(ctx, errorCode);
if (errorCode!=0) {
raiseError<output_RH>(ctx);
raiseError<output_Temp>(ctx);
raiseError<output_Done>(ctx);
} else {
emitValue<output_RH>(ctx, sensor->getHumidity());
emitValue<output_Temp>(ctx, sensor->getTemperature());
emitValue<output_Done>(ctx, 1);
}
}
}