totalsum arduino

#include <WiFi.h>
#include <WebServer.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
#include <EEPROM.h>

const char* ssidAP = "facerecognition";
const char* passwordAP = "123456789";

WebServer server(80);

String wifiSSID;
String wifiPassword;
String firebaseURL;
String firebaseAPIKey;
String firebaseNode;

const int EEPROM_SIZE = 512;
const int ledPin = 2;

unsigned long startTime = 0;
bool ledOn = false;
int duration = 0;
String globalSerialData = "";

void processJsonAndSendSerial2(const String &jsonString) {
    StaticJsonDocument<200> jsonDoc;
    DeserializationError error = deserializeJson(jsonDoc, jsonString);
    if (error) {
        Serial.print("deserializeJson() failed: ");
        Serial.println(error.f_str());
        return;
    }
    Serial.print("json send to serial => ");
    Serial.println(jsonString);
    Serial2.write(jsonString.toInt());
}

bool connectToWiFi() {
    if (wifiSSID.length() > 0) {
        WiFi.softAPdisconnect();
        WiFi.begin(wifiSSID.c_str(), wifiPassword.c_str());
        int attempts = 0;
        while (WiFi.status() != WL_CONNECTED && attempts < 20) {
            delay(500);
            Serial.print(".");
            attempts++;
        }
        Serial.println();
        return WiFi.status() == WL_CONNECTED;
    }
    return false;
}

void setupAccessPoint() {
    WiFi.softAP(ssidAP, passwordAP);
    server.on("/", handleRoot);
    server.on("/submit", handleFormSubmission);
    server.begin();
    Serial.println("Web server started.");
}

void saveToEEPROM() {
    EEPROM.writeString(0, wifiSSID);
    EEPROM.writeString(100, wifiPassword);
    EEPROM.writeString(200, firebaseURL);
    EEPROM.writeString(300, firebaseAPIKey);
    EEPROM.writeString(400, firebaseNode);
    EEPROM.commit();
}

void handleRoot() {
    server.send(200, "text/html", "<h1>ESP32 Configuration</h1>");
}

void handleFormSubmission() {
    if (server.method() == HTTP_POST) {
        wifiSSID = server.arg("ssid");
        wifiPassword = server.hasArg("password") ? server.arg("password") : "";
        firebaseURL = server.arg("firebaseURL");
        firebaseAPIKey = server.arg("firebaseAPIKey");
        firebaseNode = server.arg("firebaseNode");
        saveToEEPROM();
        connectToWiFi() ? Serial.println("Connected to WiFi") : setupAccessPoint();
    }
}

void readFromEEPROM() {
    wifiSSID = EEPROM.readString(0);
    wifiPassword = EEPROM.readString(100);
    firebaseURL = EEPROM.readString(200);
    firebaseAPIKey = EEPROM.readString(300);
    firebaseNode = EEPROM.readString(400);
}

String getFirebaseTotalSum() {
    if (WiFi.status() == WL_CONNECTED) {
        HTTPClient http;
        String url = firebaseURL + "/" + firebaseNode + "/totalSum/value.json?auth=" + firebaseAPIKey;
        http.begin(url);
        int httpResponseCode = http.GET();
        if (httpResponseCode > 0) {
            String jsonData = http.getString();
            http.end();
            return jsonData;
        }
        http.end();
    }
    return "0";
}

String getFirebaseData() {
    if (WiFi.status() == WL_CONNECTED) {
        HTTPClient http;
        String url = firebaseURL + "/" + firebaseNode + "/RX.json?auth=" + firebaseAPIKey;
        http.begin(url);
        int httpResponseCode = http.GET();
        if (httpResponseCode > 0) {
            String jsonData = http.getString();
            http.end();
            return jsonData;
        }
        http.end();
    }
    return "Wi-Fi not connected";
}

void setup() {
    Serial.begin(115200);
    Serial2.begin(9600, SERIAL_8N1, 16, 17);
    EEPROM.begin(EEPROM_SIZE);
    readFromEEPROM();
    if (!connectToWiFi()) setupAccessPoint();
    server.on("/", handleRoot);
    server.on("/submit", handleFormSubmission);
    server.begin();
    Serial.println("Web server started.");
}

void loop() {
    server.handleClient();
    if (WiFi.status() == WL_CONNECTED) {
        String totalSumStr = getFirebaseTotalSum();
        Serial.println("TotalSum from Firebase: " + totalSumStr);
        int totalSumValue = totalSumStr.toInt();
        if (totalSumValue > 0) {
            String binaryString = String(totalSumValue, BIN);
            Serial.println("Binary totalSum: " + binaryString);
            Serial2.println(binaryString);
        }
        String jsonRXData = getFirebaseData();
        Serial.println("Received from Firebase (RX Data) = " + jsonRXData);
        processJsonAndSendSerial2(jsonRXData);
        delay(500);
    } else {
        setupAccessPoint();
    }
}