Dear friends, welcome back! In this video I am
going to show you how to connect this 1.3” OLED display to a Raspberry Pi Pico board. I will also
show you how to use it with Arduino and I will share with you 3 useful projects to help you get
started and save you a lot of time. Let’s start. I recently discovered this OLED display and
I wanted to try it out because it is bigger in size than the OLED display I was using so
far which is 1” in diagonal. The new display is 1.3” in diagonal, which makes it a lot bigger.
Similar to other OLED displays, this display has an excellent contrast and low power consumption.
The display has a resolution of 128x64 pixels, it is monochrome and it uses the I2C interface to
communicate with the microcontroller. This makes the connection to the Raspberry Pi Pico extremely
easy. All we have to do is to connect power and two more wires. Let’s see how to connect it.
The first pin of the display is the GND pin, so we connect it to a GND pin of the Raspberry Pi
Pico board. The second pin is VCC so we connect it to the 5V output of the Raspberry Pi Pico
board. The next pin is named SCL and we connect it to pin GP5 which is right here, it’s the
7th pin of the board. The last pin is named SDA and we connect it to pin GP4 which is pin
number 6. That’s it, our connections are ready. Let’s power up the board to see what happens. As
you can see I have loaded a demo sketch to it, and it displays a “Hello World” message.
Beautiful, our hardware setup is working fine. Let’s now see the software we need to drive
this display. I am going to use Arduino today, so I open up the latest version of the
Arduino IDE at the time of this recording. All we have to do is to click here, at the Library
Manager button, search for the excellent GyverOLED library and press the install button. Now that
the library is installed we can use it at once. As you can see the code of the first
example is very simple. All we do is we create an oled object and we simply call some
methods. At first we initialise the display, and then we clear it and we call the update
method to reflect the changes to the screen. Next we set the cursor to the desired, X and Y
coordinates on the screen, and we print the Hello World message with the print method. Next we draw
a frame around the screen with the rect method, and lastly we send all the changes to the
display with the update method. Easy, isn’t it? The second example is a program that displays
the temperature using a DHT22 sensor. I have connected the sensor to pin GP15. I have also
included the DHT library to make it work. As you can see, the project is working fine and
it updates the temperature every two seconds. The library only supports English and Russian
text printing. But if we want to print the User Interface in another language we can load
it as a bitmap and only print the numbers for the temperature with the library. For
example, in Photoshop I created a new .bmp file with dimensions 128x64 pixels with the text
“temperature” in Greek. I saved it as a .bmp file and loaded it into the LCDAssistant software. I
then saved it to a .c file. The software created a byte array that I can use in my sketch. I
just have to copy and paste it in my program. Now instead of printing the text and drawing a
frame using the library I just call the drawBitmap function. Cool huh! Our project now speaks Greek.
By the way, If you find what I just shared with you useful, give this video a
like so more people can learn about this easy procedure. Thank you very much.
The last project I want to share with you is a Pong game where the cpu controls both paddles.
I wanted to see if the display can update fast enough to allow us to develop games with it. As
you can, it is pretty fast. When I first ran the program I was disappointed because the frame rate
was not as fast, it was barely playable. But after some search, I discovered that if we manually
set the I2C bus frequency at 800KHz the display works fast! Very cool! As always you can find the
code of the projects in the video description. So, this display is really fast using Arduino and
I am going to use it a lot in the future. I am using Arduino and not CircuitPython or MicroPython
because it is way faster in execution time. Please check the video comparison I did to see for
yourself. If speed is an issue for your project, Arduino is the way to go. Thanks for
watching, I will see you next time.
