While the SSD1306 OLED has somewhat become the go-to display for up-to-date projects, the good old character ... each LCD via I2C, two TCA9548A I2C multiplexers are connected to an Arduino ...

Getting a character LCD running should be really simple. The gotcha is the logic level gap between the devices. If you’ve been working with Arduino, your add-ons are probably meant for a 5V ...