![microcontroller - Can SPI and I2C be implemented using GPIO pins? - Electrical Engineering Stack Exchange microcontroller - Can SPI and I2C be implemented using GPIO pins? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/Muyew.png)
microcontroller - Can SPI and I2C be implemented using GPIO pins? - Electrical Engineering Stack Exchange
![Amazon.com: DWEII 6PCS OLED Display Module I2C IIC 128X64 0.96 Inch Display Module SSD1315 Display with Pins for Arduino UNO R3 STM -Blue Light : Industrial & Scientific Amazon.com: DWEII 6PCS OLED Display Module I2C IIC 128X64 0.96 Inch Display Module SSD1315 Display with Pins for Arduino UNO R3 STM -Blue Light : Industrial & Scientific](https://m.media-amazon.com/images/I/71Jbi1NWUuL.jpg)
Amazon.com: DWEII 6PCS OLED Display Module I2C IIC 128X64 0.96 Inch Display Module SSD1315 Display with Pins for Arduino UNO R3 STM -Blue Light : Industrial & Scientific
![ArduCam OV5642 works with Arduino DUE's secondary I2C bus but not default I2C bus · Issue #513 · ArduCAM/Arduino · GitHub ArduCam OV5642 works with Arduino DUE's secondary I2C bus but not default I2C bus · Issue #513 · ArduCAM/Arduino · GitHub](https://user-images.githubusercontent.com/39510964/109477255-ab898c00-7a2c-11eb-8437-88b5093bfa8c.png)