Teyleten Robot 1.3 inch OLED Display Module I2C IIC Serial OLED 128x64 Module SSH1106 for Arduino Raspberry Pi 3pcs

Initially I tried to get them work with the SSD1306 library form Adafruit and it failed to run the example running well only the first 8 lines as in the photo. After my own research I found the library SH1106 Adafruit (version 2.1.8) from Arduino library manager and they worked. The problem to find the library was initially the tricky SSH1106 part number in the Amazon advert for these OLEDs. Also the address was not the one printed in the back (Ox7B) instead I used the i2c scanner in Arduino to get the right one (0X3C). After dealing with these problems the OLEDs worked, well contrast and the three units bought arrived in good condition.

This is not a problem if you are connecting it using jumpers but for permanent installs, like on a PCB, this will not work if you pre-wired it to match the product pictures.If you don't notice the pins your board will go up in smoke.

The major complaint that I have is that garbage is displayed along the entire right side of the display (as shown in the picture). Another issue is that the functions available in the ACROBOTIC SSD1306 library are pretty limited so it is almost impossible to generate characters larger in size. Given that the drawBitmap function can only be used once to generate a bitmap image, trying to use bitmapped characters is not an option.

On many small displays, the order of the pins from left to right is GND VCC SCL SDA. It is possible to have the power and ground order reversed, giving you VCC GND. While this is barely acceptable for a breadboard (consistency!), it is unacceptable when the 4 layer PC board has been designed for GND VCC order.The parts as shipped were VCC/GND. The pictures were GND/VCC. Parts were unusable. As an opinion, anyone selling such displays needs to have both an accurate picture AND put the pin order in writing.

The I2C address printed on the board was 0x78. The other address you can enable with a jumper was 0x7A. But neither worked. I ran i2c_scanner and it was actually 0x3C. Not the end of the world but I'm sure it will frustrate some people.The display looks nice and bright. Not quite as fast as SPI, which is normal. No complaints aside from the address issue.

All 3 displays didn't work with any of the 1306 or 1011 libraries I use. Also the pins are not in the same order as they are in the pictures (wasn't an issue for my intented application but still be warned).