#include <WiFi.h>
#include <ThingSpeak.h>
#define LIGHT_SENSOR_PIN 34
#define SECRET_SSID "Wokwi-GUEST"    // replace with your WiFi network name
#define SECRET_PASS "" // replace with your WiFi password

#define SECRET_CH_ID 616045   // replace 0000000 with your channel number
#define SECRET_WRITE_APIKEY "B1NBFBL42LL9WNK9"   // replace XYZ with your channel write API Key

char ssid[] = SECRET_SSID;   // your network SSID (name) 
char pass[] = SECRET_PASS;   // your network password
int keyIndex = 0;            // your network key Index number (needed only for WEP)
WiFiClient  client;
unsigned long myChannelNumber = SECRET_CH_ID;
const char * myWriteAPIKey = SECRET_WRITE_APIKEY;
const float GAMMA = 0.7;
const float RL10 = 50;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo native USB port only
  }
    WiFi.mode(WIFI_STA);   
  ThingSpeak.begin(client);  // Initialize ThingSpeak
}

void loop() {
  if(WiFi.status() != WL_CONNECTED)
  {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(SECRET_SSID);
    while(WiFi.status() != WL_CONNECTED)
    {
      WiFi.begin(ssid, pass); // Connect to WPA/WPA2 network. Change this  line if using open or WEP network
      Serial.print(".");
      delay(5000);     
    } 
    Serial.println("\nConnected.");
  }
  int analogValue = analogRead(LIGHT_SENSOR_PIN);
  delay(10); // this speeds up the simulation
  //float ADC = 3.3/4096;
  float V0 = analogValue*(3.3/4096);
  float lux = (250/V0)-50;

  // float voltage = analogValue / 4095. * 3.3;
  // float resistance = 2000 * voltage / (1 - voltage / 3.3);
  // float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

  Serial.println(analogValue);
  Serial.println(lux);

  ThingSpeak.setField(7, analogValue);
  ThingSpeak.setField(8, lux);
  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if(x == 200)
  
  {
    Serial.println("Channel update successful.");
  }
  else
  {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }
  delay(10000); // Wait 7 seconds to update the channel again


  delay(5000);
}