public MeadowApp()
{
Console.WriteLine("Initializing...");
// create a trigger for the LA
trigger = Device.CreateDigitalOutputPort(Device.Pins.D13);
Console.WriteLine("Trigger on D02");
trigger.State = true;
// configure our BME280 on the I2C Bus
var i2c = Device.CreateI2cBus();
bme280 = new Bme280(
i2c,
Bme280.I2cAddress.Adddress0x76 //default
//Bme280.I2cAddress.Adddress0x77 //default
);
// TODO: SPI version
// Example that uses an IObersvable subscription to only be notified
// when the temperature changes by at least a degree, and humidty by 5%.
// (blowing hot breath on the sensor should trigger)
bme280.Subscribe(new FilterableChangeObserver <AtmosphericConditionChangeResult, AtmosphericConditions>(
h => {
Console.WriteLine($"Temp and pressure changed by threshold; new temp: {h.New.Temperature}, old: {h.Old.Temperature}");
},
e => {
return(
(Math.Abs(e.Delta.Temperature.Value) > 1)
&&
(Math.Abs(e.Delta.Pressure.Value) > 5)
);
}
));
// classical .NET events can also be used:
bme280.Updated += (object sender, AtmosphericConditionChangeResult e) => {
Console.WriteLine($" Temperature: {e.New.Temperature}°C");
Console.WriteLine($" Pressure: {e.New.Pressure}hPa");
Console.WriteLine($" Relative Humidity: {e.New.Humidity}%");
};
// just for funsies.
Console.WriteLine($"ChipID: {bme280.GetChipID():X2}");
//Thread.Sleep(1000);
//// is this necessary? if so, it should probably be tucked into the driver
//Console.WriteLine("Reset");
//bme280.Reset();
// get an initial reading
ReadConditions().Wait();
// start updating continuously
bme280.StartUpdating();
}
public TemperatureMonitor(II2cBus i2CBus, Logger logger)
{
_logger = logger;
_bme280 = new Bme280(i2CBus, Bme280.I2cAddress.Adddress0x77);
_bme280.Subscribe(new FilterableChangeObserver <AtmosphericConditionChangeResult, AtmosphericConditions>(
h => ProcessAtmosphericChange(h.New),
e => Math.Abs(e.Delta.Temperature.GetValueOrDefault()) > 0.1
));
// get chip id
_logger.LogMessage(() => $"BME280 ChipID: {_bme280.GetChipID():X2}");
// get an initial reading
ReadConditions().ContinueWith(t => _bme280.StartUpdating());
}
