Published May 23, 2014

Using the OLED Screen to display a temperature

In this tutorial you will learn how to print data onto an OLED Screen, and how to read values from a digital thermometer.

Full instructions provided3,313

Using the OLED Screen to display a temperature

Things used in this project

Hardware components

SODAQ Moja

0.5W Solar Panel

1aH battery pack

Grove - Temperature Sensor

Grove - OLED 0.96"x0.96" Display

Grove w/o Buckle Cable (any length)

Story

The display showing the current temperature

0.5W Solar Panel

SODAQ Moja

1aH battery pack

Grove - Temperature Sensor

Grove - OLED 0.96"x0.96" Display

Grove w/o Buckle Cable (any length)

Instructions

First download the following zip file: http://www.seeedstudio.com/wiki/File:LCD_Display9696_Library.zip

Unzip it into the libraries file in the Arduino folder that is found in my documents after the application is installed.

Plug the display into the SDA SCL pin in the always on (not switched) row.

Next, place the grove temperature sensor into the A0 A1 in the always on row. Plug the 0.5W solar panel and the 1A LiPo battery into the respective sockets (see http://www.sodaq.net/#!getting-started/c21ma for a board diagram).

Turn on the SODAQ board, compile and upload the following sketch from the arduino IDE onto the SODAQ Board, and then unplug the USB cable from the computer when it is working.

Code

Download

#include <wire.h>
#include  <SeeedGrayOLED.h>
#include  <avr/pgmspace.h>
#include  <math.h>
int a;
float temperature;
int B=3975; //B value of the thermistor
float resistance;
 
void setup()
{
 Wire.begin();
 SeeedGrayOled.init(); //initialize SEEED OLED display
 SeeedGrayOled.clearDisplay(); //Clear Display.
 SeeedGrayOled.setNormalDisplay();
   //Set Normal Display Mode
 SeeedGrayOled.setVerticalMode();
   //Set addressing mode to Page Mode
 
 for(char i=0; i < 12 ; i++);
}
 
void loop()
 
{
 
 SeeedGrayOled.setTextXY(0,0);
   //Set the cursor to Xth Page, Yth Column
 SeeedGrayOled.putString("Temp (oC):");
   //Print the String
 SeeedGrayOled.putNumber(temperature);
 a=analogRead(0);
 resistance=(float)(1023-a)*10000/a;
   //get the resistance of the sensor
 temperature=1/(log(resistance/10000)/B+1/298.15)-273.15;
   //convert to temperature via datasheet
 
 delay(1000);
 
}

code.c

#include <wire.h>
#include  <SeeedGrayOLED.h>
#include  <avr/pgmspace.h>
#include  <math.h>
int a;
float temperature;
int B=3975; //B value of the thermistor
float resistance;
 
void setup()
{
 Wire.begin();
 SeeedGrayOled.init(); //initialize SEEED OLED display
 SeeedGrayOled.clearDisplay(); //Clear Display.
 SeeedGrayOled.setNormalDisplay();
   //Set Normal Display Mode
 SeeedGrayOled.setVerticalMode();
   //Set addressing mode to Page Mode
 
 for(char i=0; i < 12 ; i++);
}
 
void loop()
 
{
 
 SeeedGrayOled.setTextXY(0,0);
   //Set the cursor to Xth Page, Yth Column
 SeeedGrayOled.putString("Temp (oC):");
   //Print the String
 SeeedGrayOled.putNumber(temperature);
 a=analogRead(0);
 resistance=(float)(1023-a)*10000/a;
   //get the resistance of the sensor
 temperature=1/(log(resistance/10000)/B+1/298.15)-273.15;
   //convert to temperature via datasheet
 
 delay(1000);
 
}

Credits

Ollie Smeenk

8 projects • 6 followers

Business-oriented Tinkerer! Ready to engage in any project for- and not for profit!

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Using the OLED Screen to display a temperature

Using the OLED Screen to display a temperature

Things used in this project

Hardware components

Story

The display showing the current temperature

Instructions

Code

Code

Code

code.c

Credits

Ollie Smeenk

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