Roundy is a 1.28-inch round LCD display based on RP2040/ESP-12E, RoundyPi is based on Raspberry Pi's dual-core RP2040 microcontroller, and RoundyFi is an ESP-12E MCU capable of running at 80 or 160MHz with built-in support for 802.11b/g/n Wi-Fi. The ESP-12E is particularly praised for its efficiency and ease of use.