Let’s now take a quick look at the code of the project. You can find the schematic diagram attached here.Īs you can see the project is working fine and it displays the temperature and the humidity in real-time. To make things easier I have also used a small breadboard. We only need power and a signal wire which I connect it to digital pin 7. Let’s connect a DHT22 Temperature and Humidity Sensor to the Arduino.
That’s why it is used in so many 3D printers. We can achieve some cool animations with this display, it is quite capable. As you can see, this example sketch demonstrates the capabilities of the library and of the display. Now let’s watch the demo sketch for a few seconds. If you can’t see anything at the display, you have to adjust the contrast of the display using this small potentiometer which is located at the back of the display. After a few seconds, the sketch is up and running. We uncomment this line like this and we are ready to upload the sketch to the Arduino. So we search the code for “ST7920” and from the available constructors, we select to use the HW_SPI one. Since the U8G library supports many displays we have to select the appropriate constructor for our display. We only need to make one change to the sketch before uploading it to the board. Now let’s go to File → Examples and from the examples provided with the library let’s run the GraphicsText example. We select it and we press install! That’s it, our library is ready to use. We open the Arduino IDE and from the menu we select Sketch → Include Library → Manage Libraries and we search for the U8G2 library. I am going to use the u8g library to drive this display.
#Weather display software
Now let’s see the software we need to drive this display.
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