How to connect two TCN75A temperature sensors with Arduino ?

Other Hardware Sensors
1

Hello arduino enthusiasts :),

I recently bought Arduino Uno and I am trying to create a thermal regulator device. For this purpose I also bought two TCN75A thermal sensors. I am able to connect one of the sensors, and get the temperature readings, but I am not sure how to connect the second one. Here is what I have done so far:

Schematics:

  • SDA -> ?4
  • SCL -> ?5
  • Vcc -> 5V
  • GND -> GND

Code:

#include <Wire.h>

int reading = 0;
float temperature = 0;

void setup(){

Serial.begin(9600);
Wire.begin();

///// sets resolution for the measurement
Wire.beginTransmission(B1001000);
Wire.send(0x01);
Wire.send(0x60);
Wire.endTransmission();

Wire.beginTransmission(B1001000);
Wire.send(0x00);
Wire.endTransmission();
}

void loop(){

Wire.requestFrom(B1001000, 2);
reading = Wire.receive();

reading = reading << 8;
reading |= Wire.receive();

reading = reading >> 4;

temperature = (float)reading/16; // ??????? ?? 16 ?????????? ????

Serial.println(temperature,3); // ????? ???????? ? ?? ??? ???
// ? 3 ????? ???? ?????????

delay(500);
}

Thanks is advance.

Best regards

2

It's a I2C (2 - Wire) device, so you need to arrange for them to be at different bus addresses, by wiring pins 5, 6 and 7 on the chip differently.
You should be able to have up to eight of them on a single bus - refer to the datasheet of the Microbot module.

3

I do not see the pullup resistors. This will become more important as you add more devices.
I suggest some background reading, for example:

4

It's working :). Thanks for the help guys !