Example #1
0
        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();
        }
Example #2
0
        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());
        }