Project 34: arduino thermometer
Required Components
The segments needed for this undertaking are as per the following
- Arduino Uno
- Monochrome OLED 128X64
- DHT22 Temperature and Humidity Sensor
- Associating wires
- Breadboard
Circuit Diagram
Most importantly, we will associate the OLED with the Arduino. The OLED can be associated with the Arduino in I2C just as SPI. The associations for interfacing the OLED in the I2C way are simpler yet SPI correspondence is quicker than the I2C. Thus, we will interface the OLED with the Arduino utilizing SPI. Make the associations of the OLED with the Arduino as follows:
Associate the CS nail to the OLED to nail 10 to the Arduino
Interface the DC nail to the OLED to nail 9 to the Arduino
Interface the RST nail to the OLED to nail 8 to the Arduino
Associate the D1 or CLK nail to the OLED to nail 11 to the Arduino
Interface the D0 or DIN nail to the OLED to nail 13 to the Arduino
We have associated the OLED to pins 13, 11, 10, 9, and 8 on the grounds that these pins are for SPI correspondence. Next, associate the DHT22 with the Arduino. The associations for DHT22 sensor with Arduino are as per the following:
Associate the VCC on DHT22 to the 5V pin on the Arduino
Associate the GND on the DHT22 to the GND on the Arduino
Interface the information pin of the DHT22 to nail 7 to the Arduino
Arduino Code
#include
#include "DHT.h"
#define DHTPIN 7
#define DHTTYPE DHT22
DHT sensor(DHTPIN, DHTTYPE);
U8GLIB_SH1106_128X64 oled (13, 11, 10, 9, 8);
void setup()
{
sensor.begin();
oled.firstPage();
do
{
oled.setFont(u8g_font_fur14); //setting the font size
//Printing the data on the OLED
oled.drawStr(20, 15, "Welcome");
oled.drawStr(40, 40, "To");
oled.drawStr(5, 60, "DIYHACKING");
} while( oled.nextPage() );
delay(5000);
}
void loop()
{
float h = sensor.readHumidity(); //Reading the humidity value
float t = sensor.readTemperature(); //Reading the temperature value
float fah = sensor.readTemperature(true); //Reading the temperature in Fahrenheit
if (isnan(h) || isnan(t) || isnan(fah)) { //Checking if we are receiving the values or not
Serial.println("Failed to read from DHT sensor!");
return;
}
float heat_index = sensor.computeHeatIndex(fah, h); //Calculating the heat index in Fahrenheit
float heat_indexC = sensor.convertFtoC(heat_index); //Calculating the heat index in Celsius
oled.firstPage();
do
{
oled.setFont(u8g_font_fub11); //setting the font size
//Printing the data on the OLED
oled.drawStr(0, 15, "Temp: ");
oled.drawStr(0, 40, "Hum: ");
oled.drawStr(0, 60, "Hi: ");
oled.setPrintPos(72, 15); //setting the dimensions to print the temperature
oled.print(t, 0);
oled.println("C");
oled.setPrintPos(72, 40); //setting the dimensions to print the humidity
oled.print(h, 0);
oled.println("%");
oled.setPrintPos(72, 60); //setting the dimensions to print the heat index
oled.print(heat_indexC, 0);
oled.println("%");
}
while( oled.nextPage() );
delay(2000);
}
