Bitcoin Dashboard for Elecrow 7-inch HMI Display

A real-time financial dashboard displaying cryptocurrency, precious metals, stocks, and market indices on the Elecrow 7.0-inch ESP32 HMI Display.

Hardware

Display: Elecrow 7.0-inch ESP32 HMI Display (Advance series)
Resolution: 800x480 RGB parallel interface
Touch: GT911 capacitive touch controller
MCU: ESP32-S3 with N4R8 module (4MB Flash, 8MB PSRAM)

Features

Real-time price data from Yahoo Finance API
Auto-refresh every 5 minutes
Touch to manual refresh
WiFi credentials stored in persistent memory
Antialiased fonts (DejaVu family)

Displayed Assets

Column	Assets
Hard Money	Bitcoin (BTC/USD), Gold, Silver
Stocks	MSTR, STRC
Indices	NASDAQ, DOW, S&P 500

Color Scheme

Asset	Color	Hex
Bitcoin	Orange	`#F7931A`
Gold	Gold	`#FFD700`
Silver	Silver	`#C0C0C0`
Stocks/Indices	Dollar Green	`#00A86B`
Status Bar	Bitcoin Orange	`#F7931A`

Software Stack

Framework: Arduino (PlatformIO)
Display Library: LovyanGFX v1.2.19
Fonts: DejaVu (antialiased)

Building

cd /home/chad/Documents/PlatformIO/Projects/bitcoin_dashboard
pio run -t upload

PlatformIO Configuration

Platform: espressif32@6.8.1
Board: esp32-s3-devkitc-1
Partition: huge_app.csv (3MB app, no OTA)
Flash Mode: QIO @ 80MHz
PSRAM: OPI (8MB)

Data Source

Yahoo Finance API:

https://query1.finance.yahoo.com/v8/finance/chart/{SYMBOL}?interval=1d&range=1d

Symbol Mapping

Display	Yahoo Symbol
Bitcoin	BTC-USD
Gold	GC=F
Silver	SI=F
MSTR	MSTR
STRC	STRC
NASDAQ	^IXIC
DOW	^DJI
S&P 500	^GSPC

Pin Configuration

RGB Display Interface

Signal	GPIO
D0-D15	15, 7, 6, 5, 4, 9, 46, 3, 8, 16, 1, 14, 21, 47, 48, 45
HSYNC	GPIO 39
VSYNC	GPIO 40
DE	GPIO 41
PCLK	GPIO 0
Backlight	GPIO 2

Touch Controller (GT911)

Signal	GPIO
SDA	GPIO 19
SCL	GPIO 20
I2C Address	0x14

WiFi Setup

WiFi credentials are stored in ESP32 preferences (persistent storage):

preferences.begin("wifi", true);
preferences.putString("ssid", "your_ssid");
preferences.putString("password", "your_password");
preferences.end();

Project Structure

bitcoin_dashboard/
├── src/
│   └── main.cpp          # Main application
├── docs/
│   └── README.md         # This file
├── platformio.ini        # PlatformIO configuration
└── .gitignore

License

MIT

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