private void OnIsrEcho()
{
int now = WiringPi.Micros();
if (WiringPi.DigitalRead(ECHOPin) == WiringPiConst.High)
{
_startTime = now;
}
else
{
_endTime = now;
_dataValid = true;
}
}
public void Read()
{
for (Tries = 1; Tries < Retries + 1; Tries++)
{
WiringPi.PinMode(DataPin, WiringPiConst.Output);
WiringPi.DigitalWrite(DataPin, WiringPiConst.Low);
WiringPi.DelayMicroseconds(20000);
WiringPi.DigitalWrite(DataPin, WiringPiConst.High);
WiringPi.DelayMicroseconds(30);
WiringPi.PinMode(DataPin, WiringPiConst.Input);
// Chip start to transfer
int state = WiringPi.DigitalRead(DataPin);
int lastState = WiringPiConst.High;
for (int i = 0; i < MaxTransferReads; i++)
{
int readCounter = 0;
do
{
readCounter++;
lastState = state;
WiringPi.DelayMicroseconds(1);
state = WiringPi.DigitalRead(DataPin);
} while (!(lastState == WiringPiConst.High && state == WiringPiConst.Low) && readCounter < 100);
// --> High->Low trigger
lastState = WiringPiConst.Low;
_timeOfChange[i] = WiringPi.Micros();
}
GetDHTData(1);
if (IsDataValid)
{
break;
}
else
{
Thread.Sleep(400);
}
}
}
