LILYGO T-Watch 2021

ESP32
LILYGO T-Watch 2021

Programmable ESP32 smartwatch with 1.3-inch round GC9A01 IPS touchscreen (240×240), BMA423 accelerometer, vibration motor, RTC, WiFi, and BLE 4.2 — open-source and fully programmable with Arduino or M

ESP324MBWiFi 802.11 b/g/nBLE BLE 4.2
~$26View

M5Stack Dial

Dev Board
M5Stack Dial

ESP32-S3 smart rotary knob with 1.28" round GC9A01 touch display (240x240), rotary encoder, RFID reader (WS1850S), RTC (BM8563), buzzer, and 2 Grove ports for IoT control interfaces.

Xtensa LX7 dual-core @ 240MHz512KB SRAM8MBWiFi 802.11 b/g/nBLE BLE 5.0
~$23View

BigTreeTech KNOMI 2

Display
BigTreeTech KNOMI 2

1.28-inch round 240x240 LCD display for Voron StealthBurner toolhead. ESP32 MCU with WiFi and Bluetooth LE, shows print status, temperatures, and progress with customizable animated UI.

ESP32 dual-core Xtensa LX6 @ 240MHz8MB PSRAM16MBWiFiBLE

BigTreeTech Panda Knomi

Display
BigTreeTech Panda Knomi

1.28-inch round 240x240 display for Bambu Lab A1, X1, and P1 series printers. ESP32 MCU with 2.4GHz WiFi, customizable GIF animations, shows print status and temperatures wirelessly.

ESP32 dual-core Xtensa LX6 @ 240MHz4MB PSRAM4MB Himem16MBWiFi

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More to explore — popular traits shared by devices with Components: GC9A01 Round Display Driver.