We like this approach because instead of doing some hard-core LCD work ... grabbed an I2C port expander that uses just 2 of the RPi lines to address even lines of the display (four data bits ...

While the SSD1306 OLED has somewhat become the go-to display for up ... To communicate with each LCD via I2C, two TCA9548A I2C multiplexers are connected to an Arduino, along with an RTC to ...