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Thermometer


Bluetooth Thermometer displays temperature using a bluetooth enabled development board. The Android client connects to the bluetooth module and reads data streaming from an Arduino or a Raspberry Pi.

Bluetooth Thermometer

Get from Google Play Store


Parts

Arduino

HC-06 Bluetooth Module

Thermistor 103

10K Resistor

Breadboard

Jumper Wires


Thermistor Breadboard Layout

Thermistor Breadboard Layout

Bluetooth Wiring

Bluetooth Wiring

Arduino Code

					
#include <math.h>

#define ThermistorPIN 1

float vcc = 4.91;                       
float pad = 9850;                       
float thermr = 10000;

float Thermistor(int RawADC) {
  long Resistance;  
  float Temp;

  Resistance=pad*((1024.0 / RawADC) - 1); 
  Temp = log(Resistance);
  Temp = 1 / (0.001129148 + (0.000234125 * Temp) + (0.0000000876741 * Temp * Temp * Temp));
  Temp = Temp - 273.15;                      

  temp = (Temp * 9.0)/ 5.0 + 32.0;
  return Temp;
}

void setup() {
  Serial.begin(9600);
}

void loop() {
  float temp;
  temp=Thermistor(analogRead(ThermistorPIN));
  Serial.print(temp,1);
  Serial.println("");                                 
  delay(5000); 
}