Circuit Documentation

Summary

This circuit is designed to play video files from an SD card using an ESP32 microcontroller and display the video on a TFT LCD display. The ESP32 connects to a WiFi network, initializes the TFT display, and reads video files from the SD card. The main components in this circuit are the ESP32 microcontroller, a TFT LCD display (ST7735S), and a Micro SD Card Module.

Component List

ESP32 (30 pin)

• Description: A powerful microcontroller with built-in WiFi and Bluetooth capabilities.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3

TFT LCD Display ST7735S

• Description: A 1.8-inch TFT LCD display module with a resolution of 128x160 pixels.
• Pins: Vcc, GND, CS, RESET, A0, SDA, SCK, LED

Micro SD Card Module

• Description: A module for reading and writing to micro SD cards.
• Pins: cs, sck, mosi, miso, vcc, gnd

Wiring Details

ESP32 (30 pin)

• GND is connected to:

  • GND of the Micro SD Card Module
  • GND of the TFT LCD Display ST7735S

• D23 is connected to:

  • SDA of the TFT LCD Display ST7735S
  • mosi of the Micro SD Card Module

• D19 is connected to:

  • miso of the Micro SD Card Module

• D18 is connected to:

  • SCK of the TFT LCD Display ST7735S
  • sck of the Micro SD Card Module

• D5 is connected to:

  • CS of the TFT LCD Display ST7735S
  • cs of the Micro SD Card Module

• D4 is connected to:

  • RESET of the TFT LCD Display ST7735S

• D2 is connected to:

  • A0 of the TFT LCD Display ST7735S

• 3V3 is connected to:

  • Vcc of the TFT LCD Display ST7735S
  • LED of the TFT LCD Display ST7735S
  • vcc of the Micro SD Card Module

TFT LCD Display ST7735S

• Vcc is connected to:

  • 3V3 of the ESP32

• GND is connected to:

  • GND of the ESP32

• CS is connected to:

  • D5 of the ESP32

• RESET is connected to:

  • D4 of the ESP32

• A0 is connected to:

  • D2 of the ESP32

• SDA is connected to:

  • D23 of the ESP32

• SCK is connected to:

  • D18 of the ESP32

• LED is connected to:

  • 3V3 of the ESP32

Micro SD Card Module

• cs is connected to:

  • D5 of the ESP32

• sck is connected to:

  • D18 of the ESP32

• mosi is connected to:

  • D23 of the ESP32

• miso is connected to:

  • D19 of the ESP32

• vcc is connected to:

  • 3V3 of the ESP32

• gnd is connected to:

  • GND of the ESP32

Code Documentation

/*
 * ESP32 SD Card Video Player
 * This code initializes the ESP32, sets up the TFT display,
 * connects to a WiFi network, and plays video files from an SD card.
 */

#include <TFT_eSPI.h> // Include the TFT library
#include <WiFi.h> // Include the WiFi library
#include <SD.h> // Include the SD card library
#include <SPI.h> // Include the SPI library

const char* ssid = "your_SSID"; // Replace with your SSID
const char* password = "your_PASSWORD"; // Replace with your password

TFT_eSPI tft = TFT_eSPI(); // Create TFT object

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  // Initialize the TFT display
  tft.init();
  tft.setRotation(1); // Set display orientation
  tft.fillScreen(TFT_BLACK); // Clear the screen
  tft.setTextColor(TFT_WHITE); // Set text color
  tft.setTextSize(2); // Set text size
  tft.setCursor(0, 0); // Set cursor position
  tft.println("Initializing..."); // Display message
  // Connect to WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  // Initialize SD card
  if (!SD.begin()) {
    Serial.println("Card Mount Failed");
    return;
  }
  uint8_t cardType = SD.cardType();
  if (cardType == CARD_NONE) {
    Serial.println("No SD card attached");
    return;
  }
  Serial.println("SD card initialized");
}

void loop() {
  // Main loop code
  // Add your video playback logic here
  // Example: Displaying a simple message
  tft.fillScreen(TFT_BLACK); // Clear the screen
  tft.setCursor(0, 0); // Reset cursor position
  tft.println("Playing video..."); // Display message
  delay(5000); // Wait for 5 seconds before refreshing
}

This code initializes the ESP32, sets up the TFT display, connects to a WiFi network, and initializes the SD card. The main loop is currently set to display a simple message, but you can add your video playback logic in the loop.