But we can’t deny this Arduino ... I2C OLED display. Beyond the battery, a crystal, and a handful of passive components, that’s about all the support hardware it takes to put this project ...

While the SSD1306 OLED has somewhat become ... To communicate with each LCD via I2C, two TCA9548A I2C multiplexers are connected to an Arduino, along with an RTC to keep track of the time and ...