Hei,
Im tryng to read SHT25(
http://www.sensirion.com/en/pdf/product_information/Datasheet-humidity-sensor-SHT25.pdf) sensor with my arduino UNO. Since SHT25 uses 3.3v i disabled arduino pullup resistors from Wire lib (in twi.c removed digitalWrite(SDA, 1); and digitalWrite(SCL, 1)
and use my own for 3.3v.
So now here's the code im running:
Wire.beginTransmission(eSHT2xAddress); //begin
Serial.println("begin done");
Wire.write(command); //send the pointer location
Serial.println("write done");
delay(100);
Wire.endTransmission(); //end
Serial.println("end trans done");
Wire.requestFrom(eSHT2xAddress, 3);
Serial.println("request from done");
while(Wire.available() < 3) {
Serial.println("waiting"); //wait
}
//Store the result
result = ((Wire.read()) << 8);
result += Wire.read();
result &= ~0x0003; // clear two low bits (status bits)
I added Serial.println() between the Wire calls to debug whats going on and the result is that program hangs on: Wire.requestFrom(eSHT2xAddress, 3);
Whats also strange is that sometimes it happens on the first run, sometimes it reads the temperature properly couple of times and then hangs.
Do anybody have some ideas what might be going wrong?
