programming an sht71 humidity sensor

Projects Programming
1

hi all im trying to program a sht71 sensor but still not working i have a code but nothing happens... this the code

/ Maurice Ribble
// 4-3-2008
// http://www.glacialwanderer.com/hobbyrobotics

// This code tests the SHT15 on the Arduino board.
// This app assumes your data pin is pin 10 and your your clock pin is pin 11.
// To run this app just attach HyperTerminal (or similar serial communications tool)
// to your Arduino board at 9600 bits per second.  I also needed te set the
// flow control to none or I couldn't send commands to my Arduino board via HyperTerminal.
// Then press the 't' key to take a temperature reading or the 'h' key to take a
// humidity reading.

// These are commands we need to send to HSHT15 to control it
int gTempCmd  = 0b00000011;
int gHumidCmd = 0b00000101;

int shiftIn(int dataPin, int clockPin, int numBits)
{
   int ret = 0;
   int i;

   for (i=0; i 0)
  {
      cmd = Serial.read();

      switch (cmd)
      {
      case 't':  //Read Temperature
         {
           int val;
           int temp;

           sendCommandSHT(gTempCmd, theDataPin, theClockPin);
           waitForResultSHT(theDataPin);
           val = getData16SHT(theDataPin, theClockPin);
           skipCrcSHT(theDataPin, theClockPin);
           Serial.print("Temp is:");
           Serial.print(val, HEX);
           temp = -40.0 + 0.018 * (float)val;
           Serial.print("  ");
           Serial.println(temp, DEC);
           break;
         }
      case 'h': //Read Humidity
         {
           int val;
           int humid;

           sendCommandSHT(gHumidCmd, theDataPin, theClockPin);
           waitForResultSHT(theDataPin);
           val = getData16SHT(theDataPin, theClockPin);
           skipCrcSHT(theDataPin, theClockPin);
           Serial.print("Humidity is:");
           Serial.print(val, HEX);
           humid = -4.0 + 0.0405 * val + -0.0000028 * val * val;
           Serial.print("  ");
           Serial.println(humid, DEC);
           break;
         }
      default:
         {
           Serial.println("You pressed something else");
         }
      }
   }
}

any idea??? need help and also lib doesnt work

2

It doesn't even compile, let alone work. There are no setup() or loop() functions. Post a whole sketch, not just a part of one.

3

Search in the upper right gave about 20 hits ! have you checked them?

4

already check them they fo not work fot my sensor