ENVICO^®light

Thermometer Adapter

✈ Circuit Description

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✈ Arduino Sketch - The TEST - Code

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/*
 Standalone Sketch to test the Temperature sensor with an TMP101
 https://www.changpuak.ch/electronics/envico/ENVICO_TEMPERATURE/TMP100-TMP101.pdf
 (Just to test the sensor and the I2C communication)
 Alexander C. Frank, 16.06.2015, Version 1.0
*/
 
#include <Wire.h>

byte I2C_address = 0x49; 

void setup()
{
Wire.begin();        // join i2c bus (address optional for master)
Serial.begin(9600);  // start serial for output
// INIT TMP101 - SET RESOLUTION TO 12 Bits
Wire.beginTransmission(I2C_address);
Wire.write(0x01);    // Configuration Register
Wire.write(0x60);    // R0 and R1 = 1
Wire.endTransmission();
}

void loop()
{
Wire.beginTransmission(I2C_address);
Wire.write(0x00);
Wire.endTransmission();

Wire.requestFrom(I2C_address,2);
int temp_hi = Wire.read();        // integer value  
int temp_lo = Wire.read();        // fractional value
int temp = (( temp_hi << 8 ) | temp_lo ) >> 4 ;
float temperature = temp * 0.0625 ;

Serial.print(temperature,3);Serial.print(" ");Serial.print((char)176);Serial.println("C");

delay(1000);
}

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