Initial import

docs/README.md

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+# 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
+
+```bash
+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):
+
+```cpp
+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

include/lgfx_config.hpp

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+/**
+ * LGFX Display Configuration for Elecrow 7-inch HMI Display
+ * Based on working Arduino example
+ */
+
+#ifndef LGFX_CONFIG_HPP
+#define LGFX_CONFIG_HPP
+
+#define LGFX_USE_V1
+#include <LovyanGFX.hpp>
+#include <lgfx/v1/platforms/esp32s3/Panel_RGB.hpp>
+#include <lgfx/v1/platforms/esp32s3/Bus_RGB.hpp>
+#include <driver/i2c.h>
+
+class LGFX : public lgfx::LGFX_Device {
+public:
+    lgfx::Bus_RGB _bus_instance;
+    lgfx::Panel_RGB _panel_instance;
+    lgfx::Light_PWM _light_instance;
+    lgfx::Touch_GT911 _touch_instance;
+
+    LGFX(void) {
+        {
+            auto cfg = _panel_instance.config();
+            cfg.memory_width = 800;
+            cfg.memory_height = 480;
+            cfg.panel_width = 800;
+            cfg.panel_height = 480;
+            cfg.offset_x = 0;
+            cfg.offset_y = 0;
+            _panel_instance.config(cfg);
+        }
+
+        {
+            auto cfg = _bus_instance.config();
+            cfg.panel = &_panel_instance;
+
+            cfg.pin_d0 = GPIO_NUM_15;
+            cfg.pin_d1 = GPIO_NUM_7;
+            cfg.pin_d2 = GPIO_NUM_6;
+            cfg.pin_d3 = GPIO_NUM_5;
+            cfg.pin_d4 = GPIO_NUM_4;
+            cfg.pin_d5 = GPIO_NUM_9;
+            cfg.pin_d6 = GPIO_NUM_46;
+            cfg.pin_d7 = GPIO_NUM_3;
+            cfg.pin_d8 = GPIO_NUM_8;
+            cfg.pin_d9 = GPIO_NUM_16;
+            cfg.pin_d10 = GPIO_NUM_1;
+            cfg.pin_d11 = GPIO_NUM_14;
+            cfg.pin_d12 = GPIO_NUM_21;
+            cfg.pin_d13 = GPIO_NUM_47;
+            cfg.pin_d14 = GPIO_NUM_48;
+            cfg.pin_d15 = GPIO_NUM_45;
+
+            cfg.pin_henable = GPIO_NUM_41;
+            cfg.pin_vsync = GPIO_NUM_40;
+            cfg.pin_hsync = GPIO_NUM_39;
+            cfg.pin_pclk = GPIO_NUM_0;
+            cfg.freq_write = 12000000;
+
+            cfg.hsync_polarity = 0;
+            cfg.hsync_front_porch = 40;
+            cfg.hsync_pulse_width = 48;
+            cfg.hsync_back_porch = 40;
+
+            cfg.vsync_polarity = 0;
+            cfg.vsync_front_porch = 1;
+            cfg.vsync_pulse_width = 31;
+            cfg.vsync_back_porch = 13;
+
+            cfg.pclk_active_neg = 1;
+            cfg.de_idle_high = 0;
+            cfg.pclk_idle_high = 0;
+
+            _bus_instance.config(cfg);
+        }
+        _panel_instance.setBus(&_bus_instance);
+
+        {
+            auto cfg = _light_instance.config();
+            cfg.pin_bl = GPIO_NUM_2;
+            _light_instance.config(cfg);
+        }
+        _panel_instance.light(&_light_instance);
+
+        {
+            auto cfg = _touch_instance.config();
+            cfg.x_min = 0;
+            cfg.x_max = 799;
+            cfg.y_min = 0;
+            cfg.y_max = 479;
+            cfg.pin_int = -1;
+            cfg.pin_rst = -1;
+            cfg.bus_shared = false;
+            cfg.offset_rotation = 0;
+            cfg.i2c_port = I2C_NUM_1;
+            cfg.pin_sda = GPIO_NUM_19;
+            cfg.pin_scl = GPIO_NUM_20;
+            cfg.freq = 400000;
+            cfg.i2c_addr = 0x14;
+            _touch_instance.config(cfg);
+            _panel_instance.setTouch(&_touch_instance);
+        }
+        setPanel(&_panel_instance);
+    }
+};
+
+#endif // LGFX_CONFIG_HPP

include/lv_conf.h

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+/**
+ * LVGL Configuration for Bitcoin Dashboard
+ * Target: Elecrow 7-inch HMI Display (800x480)
+ */
+
+#ifndef LV_CONF_H
+#define LV_CONF_H
+
+#include <stdint.h>
+
+#define LV_COLOR_DEPTH 16
+#define LV_COLOR_16_SWAP 0
+
+#define LV_HOR_RES_MAX 800
+#define LV_VER_RES_MAX 480
+
+#define LV_DPI_DEF 100
+
+#define LV_DISP_DEF_REFR_PERIOD 16
+
+#define LV_TICK_CUSTOM 1
+#define LV_TICK_CUSTOM_INCLUDE "Arduino.h"
+#define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())
+
+#define LV_MEM_CUSTOM 1
+#define LV_MEM_CUSTOM_INCLUDE "Arduino.h"
+#define LV_MEM_CUSTOM_ALLOC malloc
+#define LV_MEM_CUSTOM_FREE free
+
+#define LV_MEM_SIZE (64 * 1024U)
+#define LV_MEM_ADR 0
+
+#define LV_DRAW_CPU_ARM_ALIGN 4
+
+#define LV_USE_DRAW_MASKS 1
+#define LV_USE_DRAW_SW 1
+#define LV_DRAW_SW_DRAW_UNIT_CNT 2
+#define LV_USE_DRAW_SW_COMPLEX_GRADIENTS 1
+#define LV_USE_DRAW_SW_SHADOW 1
+#define LV_USE_DRAW_SW_BLUR 1
+#define LV_USE_DRAW_SW_ARGB_TO_RGB565 1
+
+#define LV_USE_ASSERT_NULL 1
+#define LV_USE_ASSERT_MALLOC 1
+
+#define LV_USE_MSG 1
+#define LV_USE_FS_STDIO 0
+#define LV_USE_FS_FATFS 0
+#define LV_USE_FS_LITTLEFS 0
+#define LV_USE_LODEPNG 0
+#define LV_USE_LIBPNG 0
+#define LV_USE_BMP 0
+#define LV_USE_RLE 0
+#define LV_USE_QRCODE 0
+#define LV_USE_BARCODE 0
+#define LV_USE_TJPGD 0
+#define LV_USE_GIF 0
+
+#define LV_USE_FLEX 1
+#define LV_USE_GRID 1
+
+#define LV_USE_SNAPSHOT 1
+#define LV_USE_SYSMON 0
+#define LV_USE_PERF_MONITOR 0
+#define LV_USE_MEM_MONITOR 0
+
+#define LV_THEME_DEFAULT_DARK 0
+#define LV_THEME_DEFAULT_GROW 1
+
+#define LV_USE_THEME_DEFAULT 1
+#define LV_USE_THEME_BASIC 1
+#define LV_USE_THEME_MONO 1
+
+#define LV_USE_ARC 1
+#define LV_USE_BAR 1
+#define LV_USE_BTN 1
+#define LV_USE_BTNMATRIX 1
+#define LV_USE_CALENDAR 1
+#define LV_USE_CANVAS 1
+#define LV_USE_CHART 1
+#define LV_USE_CHECKBOX 1
+#define LV_USE_DROPDOWN 1
+#define LV_USE_IMG 1
+#define LV_USE_IMGBTN 1
+#define LV_USE_KEYBOARD 1
+#define LV_USE_LABEL 1
+#define LV_LABEL_TEXT_SELECTION 1
+#define LV_LABEL_LONG_TXT_HINT 1
+#define LV_USE_LED 1
+#define LV_USE_LINE 1
+#define LV_USE_LIST 1
+#define LV_USE_MENU 1
+#define LV_USE_METER 1
+#define LV_USE_MSGBOX 1
+#define LV_USE_ROLLER 1
+#define LV_USE_SCALE 1
+#define LV_USE_SLIDER 1
+#define LV_USE_SPAN 1
+#define LV_USE_SPINBOX 1
+#define LV_USE_SPINNER 1
+#define LV_USE_SWITCH 1
+#define LV_USE_TABVIEW 1
+#define LV_USE_TABLE 1
+#define LV_USE_TEXTAREA 1
+#define LV_USE_TILEVIEW 1
+#define LV_USE_WIN 1
+
+#define LV_FONT_MONTSERRAT_12 1
+#define LV_FONT_MONTSERRAT_14 1
+#define LV_FONT_MONTSERRAT_16 1
+#define LV_FONT_MONTSERRAT_18 1
+#define LV_FONT_MONTSERRAT_20 1
+#define LV_FONT_MONTSERRAT_22 1
+#define LV_FONT_MONTSERRAT_24 1
+#define LV_FONT_MONTSERRAT_26 1
+#define LV_FONT_MONTSERRAT_28 1
+#define LV_FONT_MONTSERRAT_30 1
+#define LV_FONT_MONTSERRAT_32 1
+#define LV_FONT_MONTSERRAT_34 1
+#define LV_FONT_MONTSERRAT_36 1
+
+#define LV_FONT_FMT_TXT_LARGE 1
+#define LV_USE_FONT_COMPRESSED 1
+#define LV_FONT_DEFAULT &lv_font_montserrat_14
+
+#define LV_TXT_ENC_UTF8 1
+#define LV_TXT_BREAK_CHARS " ,.;:-_)]}"
+#define LV_TXT_LINE_BREAK_LONG_LEN 12
+#define LV_TXT_LINE_BREAK_LONG_PRE_MIN_LEN 3
+#define LV_TXT_LINE_BREAK_LONG_POST_MIN_LEN 3
+#define LV_TXT_COLOR_CMD "#"
+
+#define LV_USE_INDEV_SCROLLBAR 1
+#define LV_USE_INDEV_BUTTON 1
+#define LV_USE_INDEV_KEYPAD 1
+#define LV_USE_INDEV_ENCODER 1
+
+#define LV_USE_GROUP 1
+
+#define LV_USE_ANIM 1
+#define LV_ANIM_HOLD_COUNT 1
+
+#define LV_GRADIENT_MAX_STOPS 2
+
+#endif // LV_CONF_H

lv_conf.h

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+/**
+ * LVGL Configuration for Bitcoin Dashboard
+ * Target: Elecrow 7-inch HMI Display (800x480)
+ */
+
+#ifndef LV_CONF_H
+#define LV_CONF_H
+
+#include <stdint.h>
+
+#define LV_COLOR_DEPTH 16
+#define LV_COLOR_16_SWAP 0
+
+#define LV_HOR_RES_MAX 800
+#define LV_VER_RES_MAX 480
+
+#define LV_DPI_DEF 100
+
+#define LV_DISP_DEF_REFR_PERIOD 16
+
+#define LV_TICK_CUSTOM 1
+#define LV_TICK_CUSTOM_INCLUDE "Arduino.h"
+#define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())
+
+#define LV_MEM_CUSTOM 1
+#define LV_MEM_CUSTOM_INCLUDE "Arduino.h"
+#define LV_MEM_CUSTOM_ALLOC malloc
+#define LV_MEM_CUSTOM_FREE free
+
+#define LV_MEM_SIZE (64 * 1024U)
+#define LV_MEM_ADR 0
+
+#define LV_DRAW_CPU_ARM_ALIGN 4
+
+#define LV_USE_DRAW_MASKS 1
+#define LV_USE_DRAW_SW 1
+#define LV_DRAW_SW_DRAW_UNIT_CNT 2
+#define LV_USE_DRAW_SW_COMPLEX_GRADIENTS 1
+#define LV_USE_DRAW_SW_SHADOW 1
+#define LV_USE_DRAW_SW_BLUR 1
+#define LV_USE_DRAW_SW_ARGB_TO_RGB565 1
+
+#define LV_USE_ASSERT_NULL 1
+#define LV_USE_ASSERT_MALLOC 1
+
+#define LV_USE_MSG 1
+#define LV_USE_FS_STDIO 0
+#define LV_USE_FS_FATFS 0
+#define LV_USE_FS_LITTLEFS 0
+#define LV_USE_LODEPNG 0
+#define LV_USE_LIBPNG 0
+#define LV_USE_BMP 0
+#define LV_USE_RLE 0
+#define LV_USE_QRCODE 0
+#define LV_USE_BARCODE 0
+#define LV_USE_TJPGD 0
+#define LV_USE_GIF 0
+
+#define LV_USE_FLEX 1
+#define LV_USE_GRID 1
+
+#define LV_USE_SNAPSHOT 1
+#define LV_USE_SYSMON 0
+#define LV_USE_PERF_MONITOR 0
+#define LV_USE_MEM_MONITOR 0
+
+#define LV_THEME_DEFAULT_DARK 0
+#define LV_THEME_DEFAULT_GROW 1
+
+#define LV_USE_THEME_DEFAULT 1
+#define LV_USE_THEME_BASIC 1
+#define LV_USE_THEME_MONO 1
+
+#define LV_USE_ARC 1
+#define LV_USE_BAR 1
+#define LV_USE_BTN 1
+#define LV_USE_BTNMATRIX 1
+#define LV_USE_CALENDAR 1
+#define LV_USE_CANVAS 1
+#define LV_USE_CHART 1
+#define LV_USE_CHECKBOX 1
+#define LV_USE_DROPDOWN 1
+#define LV_USE_IMG 1
+#define LV_USE_IMGBTN 1
+#define LV_USE_KEYBOARD 1
+#define LV_USE_LABEL 1
+#define LV_LABEL_TEXT_SELECTION 1
+#define LV_LABEL_LONG_TXT_HINT 1
+#define LV_USE_LED 1
+#define LV_USE_LINE 1
+#define LV_USE_LIST 1
+#define LV_USE_MENU 1
+#define LV_USE_METER 1
+#define LV_USE_MSGBOX 1
+#define LV_USE_ROLLER 1
+#define LV_USE_SCALE 1
+#define LV_USE_SLIDER 1
+#define LV_USE_SPAN 1
+#define LV_USE_SPINBOX 1
+#define LV_USE_SPINNER 1
+#define LV_USE_SWITCH 1
+#define LV_USE_TABVIEW 1
+#define LV_USE_TABLE 1
+#define LV_USE_TEXTAREA 1
+#define LV_USE_TILEVIEW 1
+#define LV_USE_WIN 1
+
+#define LV_FONT_MONTSERRAT_12 1
+#define LV_FONT_MONTSERRAT_14 1
+#define LV_FONT_MONTSERRAT_16 1
+#define LV_FONT_MONTSERRAT_18 1
+#define LV_FONT_MONTSERRAT_20 1
+#define LV_FONT_MONTSERRAT_22 1
+#define LV_FONT_MONTSERRAT_24 1
+#define LV_FONT_MONTSERRAT_26 1
+#define LV_FONT_MONTSERRAT_28 1
+#define LV_FONT_MONTSERRAT_30 1
+#define LV_FONT_MONTSERRAT_32 1
+#define LV_FONT_MONTSERRAT_34 1
+#define LV_FONT_MONTSERRAT_36 1
+
+#define LV_FONT_FMT_TXT_LARGE 1
+#define LV_USE_FONT_COMPRESSED 1
+#define LV_FONT_DEFAULT &lv_font_montserrat_14
+
+#define LV_TXT_ENC_UTF8 1
+#define LV_TXT_BREAK_CHARS " ,.;:-_)]}"
+#define LV_TXT_LINE_BREAK_LONG_LEN 12
+#define LV_TXT_LINE_BREAK_LONG_PRE_MIN_LEN 3
+#define LV_TXT_LINE_BREAK_LONG_POST_MIN_LEN 3
+#define LV_TXT_COLOR_CMD "#"
+
+#define LV_USE_INDEV_SCROLLBAR 1
+#define LV_USE_INDEV_BUTTON 1
+#define LV_USE_INDEV_KEYPAD 1
+#define LV_USE_INDEV_ENCODER 1
+
+#define LV_USE_GROUP 1
+
+#define LV_USE_ANIM 1
+#define LV_ANIM_HOLD_COUNT 1
+
+#define LV_GRADIENT_MAX_STOPS 2
+
+#endif // LV_CONF_H

platformio.ini

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+; PlatformIO Project Configuration File
+; Bitcoin Dashboard for Elecrow 7-inch HMI Display
+; Based on working Arduino example
+
+[env:elecrow_7inch_hmi]
+platform = espressif32@6.8.1
+board = esp32-s3-devkitc-1
+framework = arduino
+
+; Libraries
+lib_deps = 
+    lovyan03/LovyanGFX@^1.1.8
+
+monitor_speed = 115200
+
+; Critical settings for the N4R8 module (from working example)
+board_upload.flash_size = 4MB
+board_build.arduino.memory_type = qio_opi
+board_build.f_flash = 80000000L
+board_build.flash_mode = qio
+
+; Use Huge APP partition (3MB No OTA/1MB SPIFFS)
+board_build.partitions = huge_app.csv
+
+; Required build flags for S3 display stability
+build_flags = 
+    -DARDUINO_USB_MODE=1
+    -DARDUINO_USB_CDC_ON_BOOT=1
+    -DBOARD_HAS_PSRAM
+    -mfix-esp32-psram-cache-issue

src/lv_conf.h

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+/**
+ * LVGL Configuration for Bitcoin Dashboard
+ * Target: Elecrow 7-inch HMI Display (800x480)
+ */
+
+#ifndef LV_CONF_H
+#define LV_CONF_H
+
+#include <stdint.h>
+
+#define LV_COLOR_DEPTH 16
+#define LV_COLOR_16_SWAP 0
+
+#define LV_HOR_RES_MAX 800
+#define LV_VER_RES_MAX 480
+
+#define LV_DPI_DEF 100
+
+#define LV_DISP_DEF_REFR_PERIOD 16
+
+#define LV_TICK_CUSTOM 1
+#define LV_TICK_CUSTOM_INCLUDE "Arduino.h"
+#define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())
+
+#define LV_MEM_CUSTOM 1
+#define LV_MEM_CUSTOM_INCLUDE "Arduino.h"
+#define LV_MEM_CUSTOM_ALLOC malloc
+#define LV_MEM_CUSTOM_FREE free
+
+#define LV_MEM_SIZE (64 * 1024U)
+#define LV_MEM_ADR 0
+
+#define LV_DRAW_CPU_ARM_ALIGN 4
+
+#define LV_USE_DRAW_MASKS 1
+#define LV_USE_DRAW_SW 1
+#define LV_DRAW_SW_DRAW_UNIT_CNT 2
+#define LV_USE_DRAW_SW_COMPLEX_GRADIENTS 1
+#define LV_USE_DRAW_SW_SHADOW 1
+#define LV_USE_DRAW_SW_BLUR 1
+#define LV_USE_DRAW_SW_ARGB_TO_RGB565 1
+
+#define LV_USE_ASSERT_NULL 1
+#define LV_USE_ASSERT_MALLOC 1
+
+#define LV_USE_MSG 1
+#define LV_USE_FS_STDIO 0
+#define LV_USE_FS_FATFS 0
+#define LV_USE_FS_LITTLEFS 0
+#define LV_USE_LODEPNG 0
+#define LV_USE_LIBPNG 0
+#define LV_USE_BMP 0
+#define LV_USE_RLE 0
+#define LV_USE_QRCODE 0
+#define LV_USE_BARCODE 0
+#define LV_USE_TJPGD 0
+#define LV_USE_GIF 0
+
+#define LV_USE_FLEX 1
+#define LV_USE_GRID 1
+
+#define LV_USE_SNAPSHOT 1
+#define LV_USE_SYSMON 0
+#define LV_USE_PERF_MONITOR 0
+#define LV_USE_MEM_MONITOR 0
+
+#define LV_THEME_DEFAULT_DARK 0
+#define LV_THEME_DEFAULT_GROW 1
+
+#define LV_USE_THEME_DEFAULT 1
+#define LV_USE_THEME_BASIC 1
+#define LV_USE_THEME_MONO 1
+
+#define LV_USE_ARC 1
+#define LV_USE_BAR 1
+#define LV_USE_BTN 1
+#define LV_USE_BTNMATRIX 1
+#define LV_USE_CALENDAR 1
+#define LV_USE_CANVAS 1
+#define LV_USE_CHART 1
+#define LV_USE_CHECKBOX 1
+#define LV_USE_DROPDOWN 1
+#define LV_USE_IMG 1
+#define LV_USE_IMGBTN 1
+#define LV_USE_KEYBOARD 1
+#define LV_USE_LABEL 1
+#define LV_LABEL_TEXT_SELECTION 1
+#define LV_LABEL_LONG_TXT_HINT 1
+#define LV_USE_LED 1
+#define LV_USE_LINE 1
+#define LV_USE_LIST 1
+#define LV_USE_MENU 1
+#define LV_USE_METER 1
+#define LV_USE_MSGBOX 1
+#define LV_USE_ROLLER 1
+#define LV_USE_SCALE 1
+#define LV_USE_SLIDER 1
+#define LV_USE_SPAN 1
+#define LV_USE_SPINBOX 1
+#define LV_USE_SPINNER 1
+#define LV_USE_SWITCH 1
+#define LV_USE_TABVIEW 1
+#define LV_USE_TABLE 1
+#define LV_USE_TEXTAREA 1
+#define LV_USE_TILEVIEW 1
+#define LV_USE_WIN 1
+
+#define LV_FONT_MONTSERRAT_12 1
+#define LV_FONT_MONTSERRAT_14 1
+#define LV_FONT_MONTSERRAT_16 1
+#define LV_FONT_MONTSERRAT_18 1
+#define LV_FONT_MONTSERRAT_20 1
+#define LV_FONT_MONTSERRAT_22 1
+#define LV_FONT_MONTSERRAT_24 1
+#define LV_FONT_MONTSERRAT_26 1
+#define LV_FONT_MONTSERRAT_28 1
+#define LV_FONT_MONTSERRAT_30 1
+#define LV_FONT_MONTSERRAT_32 1
+#define LV_FONT_MONTSERRAT_34 1
+#define LV_FONT_MONTSERRAT_36 1
+
+#define LV_FONT_FMT_TXT_LARGE 1
+#define LV_USE_FONT_COMPRESSED 1
+#define LV_FONT_DEFAULT &lv_font_montserrat_14
+
+#define LV_TXT_ENC_UTF8 1
+#define LV_TXT_BREAK_CHARS " ,.;:-_)]}"
+#define LV_TXT_LINE_BREAK_LONG_LEN 12
+#define LV_TXT_LINE_BREAK_LONG_PRE_MIN_LEN 3
+#define LV_TXT_LINE_BREAK_LONG_POST_MIN_LEN 3
+#define LV_TXT_COLOR_CMD "#"
+
+#define LV_USE_INDEV_SCROLLBAR 1
+#define LV_USE_INDEV_BUTTON 1
+#define LV_USE_INDEV_KEYPAD 1
+#define LV_USE_INDEV_ENCODER 1
+
+#define LV_USE_GROUP 1
+
+#define LV_USE_ANIM 1
+#define LV_ANIM_HOLD_COUNT 1
+
+#define LV_GRADIENT_MAX_STOPS 2
+
+#endif // LV_CONF_H

src/mqtt_module.cpp

@@ -0,0 +1,132 @@
+/**
+ * MQTT Module Implementation
+ * Handles connection to MQTT broker and price updates
+ */
+
+#include "mqtt_module.h"
+
+MQTTModule::MQTTModule() 
+    : _port(1883), _lastReconnectAttempt(0), _initialized(false) {
+}
+
+void MQTTModule::begin(const char* server, int port, const char* user, const char* pass) {
+    _server = String(server);
+    _port = port;
+    _user = String(user);
+    _pass = String(pass);
+    
+    _wifiClient.setInsecure();
+    _mqttClient.setClient(_wifiClient);
+    _mqttClient.setBufferSize(MQTT_MAX_PACKET_SIZE);
+    _mqttClient.setCallback([this](char* t, byte* p, unsigned int l) {
+        this->_callback(t, p, l);
+    });
+    
+    _mqttClient.setServer(_server.c_str(), _port);
+    _initialized = true;
+    
+    Serial.printf("[MQTT] Configured for %s:%d\n", _server.c_str(), _port);
+}
+
+void MQTTModule::setTopic(const char* topic) {
+    _topic = String(topic);
+    Serial.printf("[MQTT] Topic set to: %s\n", _topic.c_str());
+}
+
+void MQTTModule::_callback(char* topic, byte* payload, unsigned int length) {
+    char buffer[MQTT_MAX_PACKET_SIZE];
+    if (length >= MQTT_MAX_PACKET_SIZE) {
+        length = MQTT_MAX_PACKET_SIZE - 1;
+    }
+    
+    memcpy(buffer, payload, length);
+    buffer[length] = '\0';
+    
+    Serial.printf("[MQTT] Received: %s\n", buffer);
+    _parsePriceData(buffer);
+}
+
+void MQTTModule::_parsePriceData(const char* json) {
+    JsonDocument doc;
+    DeserializationError error = deserializeJson(doc, json);
+    
+    if (error) {
+        Serial.printf("[MQTT] JSON parse error: %s\n", error.c_str());
+        return;
+    }
+    
+    bool updated = false;
+    
+    if (doc.containsKey("btc")) {
+        btcPrice = doc["btc"].as<double>();
+        Serial.printf("[MQTT] BTC: $%.2f\n", btcPrice);
+        updated = true;
+    }
+    
+    if (doc.containsKey("gold")) {
+        goldPrice = doc["gold"].as<double>();
+        Serial.printf("[MQTT] Gold: $%.2f\n", goldPrice);
+        updated = true;
+    }
+    
+    if (doc.containsKey("silver")) {
+        silverPrice = doc["silver"].as<double>();
+        Serial.printf("[MQTT] Silver: $%.2f\n", silverPrice);
+        updated = true;
+    }
+    
+    if (updated) {
+        needsRefresh = true;
+        Serial.println("[MQTT] Triggering screen refresh");
+    }
+}
+
+void MQTTModule::update() {
+    if (!_initialized) return;
+    
+    if (!_mqttClient.connected()) {
+        unsigned long now = millis();
+        if (now - _lastReconnectAttempt > 5000) {
+            _lastReconnectAttempt = now;
+            reconnect();
+        }
+    } else {
+        _mqttClient.loop();
+    }
+}
+
+bool MQTTModule::isConnected() {
+    return _mqttClient.connected();
+}
+
+void MQTTModule::reconnect() {
+    if (WiFi.status() != WL_CONNECTED) {
+        Serial.println("[MQTT] WiFi not connected, skipping reconnect");
+        return;
+    }
+    
+    Serial.print("[MQTT] Connecting...");
+    
+    String clientId = "esp32-financial-" + String((uint32_t)ESP.getEfuseMac(), HEX);
+    
+    if (_mqttClient.connect(clientId.c_str(), _user.c_str(), _pass.c_str())) {
+        Serial.println(" connected!");
+        
+        if (_topic.length() > 0) {
+            if (_mqttClient.subscribe(_topic.c_str())) {
+                Serial.printf("[MQTT] Subscribed to: %s\n", _topic.c_str());
+            } else {
+                Serial.println("[MQTT] Subscribe failed");
+            }
+        }
+    } else {
+        Serial.printf(" failed (rc=%d)\n", _mqttClient.state());
+    }
+}
+
+void MQTTModule::disconnect() {
+    if (_mqttClient.connected()) {
+        _mqttClient.disconnect();
+        Serial.println("[MQTT] Disconnected");
+    }
+}

src/mqtt_module.h

@@ -0,0 +1,46 @@
+/**
+ * MQTT Module for Financial Dashboard
+ * Handles connection to MQTT broker and price updates
+ * Additive to existing firmware - uses needsRefresh flag
+ */
+
+#ifndef MQTT_MODULE_H
+#define MQTT_MODULE_H
+
+#include <Arduino.h>
+#include <WiFi.h>
+#include <PubSubClient.h>
+#include <WiFiClientSecure.h>
+#include <ArduinoJson.h>
+
+#define MQTT_MAX_PACKET_SIZE 2048
+
+extern bool needsRefresh;
+extern double btcPrice, goldPrice, silverPrice;
+
+class MQTTModule {
+public:
+    MQTTModule();
+    void begin(const char* server, int port, const char* user, const char* pass);
+    void setTopic(const char* topic);
+    void update();
+    bool isConnected();
+    void reconnect();
+    void disconnect();
+
+private:
+    WiFiClientSecure _wifiClient;
+    PubSubClient _mqttClient;
+    String _server;
+    int _port;
+    String _user;
+    String _pass;
+    String _topic;
+    unsigned long _lastReconnectAttempt;
+    bool _initialized;
+
+    void _callback(char* topic, byte* payload, unsigned int length);
+    void _parsePriceData(const char* json);
+};
+
+#endif