ESP8266-12E (DOIT) Wi-Fi Module MCP60021 Dual Op Amp (Rail-to-Rail) CH340 USB to Serial Chip AMS1117-3.3 LDO Voltage Regulator SS34 Schottky Diodes & 4R7 SMD Inductor J3Y NPN Transistors A1SHB ...

In its fully realized form, the project uses an open hardware board that allows standard RC hobby servos to be connected to the GPIO pins of a ESP-12E module.

The design uses the ESP-12E module and features an OLED display, LEDs, tactile switches and an FT232R USB/UART interface.

“In this video, I will show you how to make a DIY WiFi Smartwatch using ESP8266 ESP-12E module for under $20. The module has an inbuilt WiFi module which allows the watch to connect to the internet.