Esp32 Not decoding Li-Fi

Using Arduino Programming Questions
#1

Hi forum,
I have an Esp32 That is receiving Data through Li-Fi then sends is to a webpage on my host using GET.

#define LDR_PIN 2
#define THRESHOLD 100
#define PERIOD 15



#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "tt";
const char* password =  "ttleboss";

void setup()
{
  Serial.begin(115200);
  pinMode(LDR_PIN, INPUT);

  WiFi.begin(ssid, password);
  Serial.println("Starting");
  WiFi.begin(ssid, password);

  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }
  Serial.println("Connected");
}

bool previous_state;
bool current_state = true ;

void loop()
{
  current_state = get_ldr();
  if (!current_state && previous_state)
  {
    print_byte(get_byte());
    Serial.println("testLDR1");
  }
  previous_state = current_state;
}

bool get_ldr()
{
  int voltage = analogRead(LDR_PIN);
  return voltage > THRESHOLD ? true : false;
}

char get_byte()
{
  char ret = 0;
  delay(PERIOD * 1.5);
  for (int i = 0; i < 8; i++)
  {
    ret = ret | get_ldr() << i;
    delay(PERIOD);
  }
  return ret;
}
void print_byte(char my_byte)
{
  char buff[2];
  sprintf(buff, "%c", my_byte);
  int value = atoi(buff);
  Serial.println(value);
  SendData(value);

}

void SendData(int val)
{
  Serial.println(String(val));
  Serial.println("test");
  if ((WiFi.status() == WL_CONNECTED)) { //Check the current connection status

    HTTPClient http;
    Serial.println(String(val));
    Serial.println("test1");

    http.begin("https://mysite.com/insert.php?Esp_Id=16&value1=" + String(val)); //Specify the URL
    int httpCode = http.GET();                                        //Make the request

    if (httpCode > 0) { //Check for the returning code

      String payload = http.getString();
      Serial.println(httpCode);
      Serial.println(payload);
    }

    else {
      Serial.println("Error on HTTP request");
    }

    http.end(); //Free the resources
  }

  delay(1000);

}

The program above exists of two separate programs that work on their own but together it doesn’t work at all.
I am using this project Wireless Data Transmission using LIGHT. DIY Li-Fi - Arduino Project Hub for the Li-Fi transmission.

#include <WiFi.h>
#include <HTTPClient.h>



const char* ssid = "xx";
const char* password =  "xx";

void setup() {

 Serial.begin(115200);
 delay(4000);
 WiFi.begin(ssid, password);

 while (WiFi.status() != WL_CONNECTED) {
   delay(1000);
   Serial.println("Connecting to WiFi..");
 }

 Serial.println("Connected to the WiFi network");

}

void loop() {

 if ((WiFi.status() == WL_CONNECTED)) { //Check the current connection status

   HTTPClient http;

   http.begin("https://mysite.com/insert.php?Esp_Id=16&value1=15"); //Specify the URL
   int httpCode = http.GET();                                        //Make the request

   if (httpCode > 0) { //Check for the returning code

       String payload = http.getString();
       Serial.println(httpCode);
       Serial.println(payload);
     }

   else {
     Serial.println("Error on HTTP request");
   }

   http.end(); //Free the resources
 }
 
 delay(1000);


}

#define LDR_PIN 2
#define THRESHOLD 100
#define PERIOD 15

bool previous_state;
bool current_state;

void setup() 
{
   Serial.begin(9600);
}

void loop() 
{
 current_state = get_ldr();
 if(!current_state && previous_state)
 {
   print_byte(get_byte());
 }
 previous_state = current_state;
}

bool get_ldr()
{
 int voltage = analogRead(LDR_PIN);
 return voltage > THRESHOLD ? true : false;
}

char get_byte()
{
 char ret = 0;
 delay(PERIOD*1.5);
 for(int i = 0; i < 8; i++)
 {
  ret = ret | get_ldr() << i; 
  delay(PERIOD);
 }
 return ret;
}
void print_byte(char my_byte)
{
 char buff[2];
 sprintf(buff, "%c", my_byte);
 Serial.print(buff);
}

Does anyone know why it won’t get past the loop in Project_Reciver?
My English isn’t the best I am sorry.

#2

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