Atak Geschrieben October 15, 2012 at 04:57 Geschrieben October 15, 2012 at 04:57 **Edit > when trying all the pins, I notice the SCL pin on the breakout board seems to give me the most accurate temperature reading, is this correct? I'm playing with the breakout board and I have it connected to the Temperature brick. I have the 5V and GND pin connected to the 5V and GND on my Arduino Leonardo board. Now in my Temperature Sketch with Arduino, I am using the Analog pin A0 with my Arduino. Which pin on the Tinkerforge Breakout board do I need to connect A0 to in order to get a correct temperature reading? Here is my Arduino sketch... //TMP36 Pin Variables int sensorPin = 0; //the analog pin the TMP36's Vout (sense) pin is connected to //the resolution is 10 mV / degree centigrade with a //500 mV offset to allow for negative temperatures /* * setup() - this function runs once when you turn your Arduino on * We initialize the serial connection with the computer */ void setup() { Serial.begin(9600); //Start the serial connection with the computer //to view the result open the serial monitor } void loop() // run over and over again { //getting the voltage reading from the temperature sensor int reading = analogRead(sensorPin); // converting that reading to voltage, for 3.3v arduino use 3.3 float voltage = reading * 5.0; voltage /= 1024.0; // print out the voltage Serial.print(voltage); Serial.println(" volts"); // now print out the temperature float temperatureC = (voltage - 0.5) * 100 ; //converting from 10 mv per degree wit 500 mV offset //to degrees ((volatge - 500mV) times 100) Serial.print(temperatureC); Serial.println(" degrees C"); // now convert to Fahrenheight float temperatureF = (temperatureC * 9.0 / 5.0) + 32.0; Serial.print(temperatureF); Serial.println(" degrees F"); delay(1000); //waiting a second } Zitieren
borg Geschrieben October 15, 2012 at 07:27 Geschrieben October 15, 2012 at 07:27 The Temperature Bricklet uses I2C, there is no analog value comming from there. See the datasheet of the TMP102: https://github.com/Tinkerforge/temperature-bricklet/raw/master/datasheets/tmp102.pdf Also: The supply voltage of the Arduino is 5V, the supply voltage of the TMP102 is 3.3V! Zitieren
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