"WiFi Transfer" rev_02

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    - Project: "WiFi Transfer"
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2024-12-03 12:03:52

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* ESP32-CAM mesh network with uniform */
    /* specifications. Select a node via Serial; typing */
    /* 'BC' triggers all nodes to transmit images to the */
    /* selected node. Typing 'N' followed by a node ID */
    /* directs the specified node to send its image to */
    /* the chosen node. */
/****** SYSTEM REQUIREMENT 2 *****/
    /* ESP32-CAM nodes communicate strictly within the */
    /* mesh network, ensuring image sharing without */
    /* external internet. The setup includes ESP32-CAM */
    /* modules paired with DEB ESP32-CAM-MB and OV2640 */
    /* cameras for optimized performance. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <ArduinoJson.h>
#include <esp_now.h>

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void initWiFi();
void initESPNow();
void sendImageToNode(int nodeId);
void receiveImageFromNode(int nodeId);
void handleSerialInput();

/****** GLOBAL VARIABLES *****/
AsyncWebServer server(80);
String selectedNodeId = "";

/****** SETUP FUNCTION *****/
void setup(void)
{
    Serial.begin(115200); // Initialize serial communication
    initWiFi();           // Initialize WiFi
    initESPNow();        // Initialize ESP-NOW
}

/****** LOOP FUNCTION *****/
void loop(void)
{
    handleSerialInput(); // Handle serial input for node selection
}

/****** FUNCTION IMPLEMENTATIONS *****/

// Initialize WiFi in AP mode
void initWiFi() {
    WiFi.mode(WIFI_AP);
    WiFi.softAP("ESP32-CAM-Network");
    Serial.println("WiFi AP initialized.");
}

// Initialize ESP-NOW for communication
void initESPNow() {
    if (esp_now_init() != ESP_OK) {
        Serial.println("ESP-NOW initialization failed.");
        return;
    }
    Serial.println("ESP-NOW initialized.");
}

// Function to send image to a specific node
void sendImageToNode(int nodeId) {
    // Code to send image to the specified node
    Serial.printf("Sending image to node %d\n", nodeId);
}

// Function to receive image from a specific node
void receiveImageFromNode(int nodeId) {
    // Code to receive image from the specified node
    Serial.printf("Receiving image from node %d\n", nodeId);
}

// Handle serial input for node selection
void handleSerialInput() {
    if (Serial.available()) {
        String input = Serial.readStringUntil('\n');
        if (input.equals("BC")) {
            // Broadcast command to all nodes
            Serial.println("Broadcasting image request to all nodes.");
            // Code to trigger all nodes to send images
        } else if (input.startsWith("N")) {
            // Extract node ID from input
            selectedNodeId = input.substring(1);
            int nodeId = selectedNodeId.toInt();
            Serial.printf("Directing node %d to send its image.\n", nodeId);
            sendImageToNode(nodeId);
        }
    }
}

/* END CODE */