Technical Guide

Technical Guide 🛠️

🔧 Hardware Specifications

• Controller: ESP32-S3-WROOM-1-N16R8
• Display: 4.7-inch EPD (ED047TC1) - 960x540 resolution.
• Touch: GT911 Capacitive Touch.
• Battery: Integrated LiPo charging with voltage monitoring via GPIO 14.
• RTC: PCF8563 for low-power timekeeping.

🏗️ Compilation & Flashing

This project is built using PlatformIO.

1. Install VS Code and the PlatformIO IDE extension.
2. Clone the Repo: git clone https://github.com/mistrysiddh/GhostPaper.git
3. Open Folder: Open the project folder in VS Code.
4. Build & Upload: Use the PlatformIO "Upload" task (arrow icon in the bottom bar).

platformio.ini Highlights

board_build.arduino.memory_type = qio_opi ; Critical for PSRAM
build_flags =
    -D BOARD_HAS_PSRAM
    -D LILYGO_T5_47_S3

📍 Pinout Reference

Component	Pin	Function
TOUCH_SDA	6	I2C Data
TOUCH_SCL	5	I2C Clock
BATT_PIN	14	Analog Read
SD_CS	13	SPI Chip Select
BUTTON_1	21	Wake/Lock

📚 Libraries Used

• LilyGo_EPD47_S3: Custom display driver.
• Button2: Debounced hardware button handling.
• TinyXML2: Parsing OPDS feeds from Project Gutenberg.
• QRCode: Generating GhostDrop transfer codes.