Chip: ESP32-WAROVER

LCD: 3.5 inch capacitive touch screen ST7796 FT6X36

USB TO TTL: CH9102F QFN24

Relay: HFD3 5V 2A

Relay connector: 5.08

DC-DC input: 5-12V

DC seat specification: 5.5X2.1

TYPE-C input: 5V

USB output: 5V 1A

Battery interface: H2.0 3.7V lithium battery

Battery switch: toggle switch

Button: RST button, custom button

RTC: PCF8563

Extension header: 2.54 2X29

Double-layer USB expansion port: output 5V 1A

Double-layer USB interface: I2C/UART function

TF card connector

Github Link:https://github.com/Xinyuan-LilyGO/TTGO_TWatch_Library/tree/master/examples/LilyPi

LILY Pi is designed and modified by the LILYGO team based on the Raspberry Pi appearance structure. The appearance is similar to the Raspberry Pi motherboard structure. The 2X20 expansion port next to it has reserved pins that match the Raspberry Pi GPIO, which is suitable for some Raspberry Pi Expansion function accessories.

Based on this structure, a 3.5-inch capacitive touch screen expansion board is designed and made, which is suitable for use on Raspberry Pi.

Functionally based on ES32-WROVER (WIFI/Bluetooth) module, 5V relay, buttons, RTC, battery-powered interface, DC socket (5-12V input) battery-powered switch, USB expansion port I2C/UART, USB expansion port are designed The output power supply can supply power and control the current of equipment below 1A.

The back side retains the TF card socket in the same position as the Raspberry Pi, which is a self-popping card socket, which is convenient for plugging in and out.

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