private DeviceReading Connect(FoundBluetoothDevice device)
{
// client is connected
NetworkStream stream = device.Client.GetStream();
if (stream.CanRead)
{
do
{
stream.ReadTimeout = 2500; // 500 millisecond timeout, if unable to get data feed
int numberOfBytesRead = stream.Read(_myReadBuffer, 0, _myReadBuffer.Length);
if (numberOfBytesRead <= 1)
{
continue;
}
string sensorTempValue = Encoding.ASCII.GetString(_myReadBuffer, 0, numberOfBytesRead);
if (string.IsNullOrWhiteSpace(sensorTempValue))
{
return(null);
}
string[] arr = sensorTempValue.Split(Environment.NewLine).ToArray();
if (arr.Length == 0)
{
return(null); // nothing to get
}
DeviceReading deviceReading = new DeviceReading();
string latestReading = arr.LastOrDefault(x => !string.IsNullOrWhiteSpace(x));
if (string.IsNullOrWhiteSpace(latestReading))
{
return(null);
}
string[] latestData = latestReading.Split(' ')
.Where(x => !string.IsNullOrWhiteSpace(x))
.ToArray();
if (latestData.Length == 1) // only one value in the array suspect stoppage
{
if (latestData[0].Equals("-sleep", StringComparison.CurrentCultureIgnoreCase))
{
throw new SleepException("The device is now sleeping");
}
}
int sdCardIndex = Array.IndexOf(latestData, "-sdCardData");
if (sdCardIndex > -1) // has sd card data
{
// loop through elements after sd card data element
SdCardDeviceReading sdCardData = ExtractBluetoothData(latestData, sdCardIndex + 1);
deviceReading.SdCardDeviceReading = sdCardData;
}
LiveDeviceReading liveDeviceReading = ExtractBluetoothData(latestData);
deviceReading.LiveDeviceReading = liveDeviceReading;
return(deviceReading);
}while (stream.DataAvailable); // only continue if there is more to stream and the parse was successful.
return(null);
}
return(null);
}
private LiveDeviceReading ExtractBluetoothData(string[] latestData)
{
LiveDeviceReading liveDeviceReading = new LiveDeviceReading();
for (int i = 0; i < latestData.Length - 1; i++)
{
// has next element
if (i + 1 > latestData.Length)
{
break;
}
string data = latestData[i].Trim();
// sometimes its stupid and trims the leading T off :/
if (data.Equals("-temp", StringComparison.CurrentCultureIgnoreCase))
{
bool isDouble = double.TryParse(latestData[i + 1], out double temp);
if (isDouble)
{
liveDeviceReading.Temperature = temp;
}
}
else if (data.Equals("-datetime", StringComparison.CurrentCultureIgnoreCase))
{
if (i + 2 > latestData.Length)
{
break;
}
string stringDateTime = latestData[i + 1] + " " + latestData[i + 2];
bool isDateTime = DateTime.TryParse(stringDateTime, out DateTime dateTime);
if (isDateTime)
{
liveDeviceReading.RecordedDateTime = dateTime;
}
}
else if (data.Equals("-lat", StringComparison.CurrentCultureIgnoreCase))
{
bool isFloat = float.TryParse(latestData[i + 1], out float latitude);
if (isFloat)
{
liveDeviceReading.Latitude = latitude;
}
}
else if (data.Equals("-long", StringComparison.CurrentCultureIgnoreCase))
{
bool isFloat = float.TryParse(latestData[i + 1], out float longitude);
if (isFloat)
{
liveDeviceReading.Longitude = longitude;
}
}
// Hit the sd card tag so stop as anything after is o valid
else if (data.Equals("-sdCardData", StringComparison.CurrentCultureIgnoreCase))
{
break;
}
}
// no date time then set to current
if (liveDeviceReading.RecordedDateTime == null)
{
liveDeviceReading.RecordedDateTime = DateTime.Now;
}
return(liveDeviceReading);
}
