// Channel ID : 2389119
// Channel api key : 6FL7D3C6PDHQ3P6V

#include <WiFi.h>
#include "ThingSpeak.h"

int analogPin = 32; //ประกาศตัวแปร ให้ analogPin แทนขา analog ขาที่5
int val = 0;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
unsigned long myChannelNumber =2389119 ;
const char * myWriteAPIKey = "6FL7D3C6PDHQ3P6V";
const char* server = "api.thingspeak.com";
int keyIndex = 0;
WiFiClient client;

void setup() {
  Serial.begin(115200);
 
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  Serial.println("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, pass);
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
}



void loop() {

  val = analogRead(analogPin);  //อ่านค่าสัญญาณ analog ขา5 เว็บไว้ในตัวแปร val
  Serial.print("val = "); // พิมพ์ข้อมความส่งเข้าคอมพิวเตอร์ "val = "
  Serial.println(val); // พิมพ์ค่าของตัวแปร val
  delay(500);

  //float analog = (val);
  
  ThingSpeak.setField(1, val);
  
  thingspeak_multi_write();
  delay(20000);
}
void wifi_reconnect() {
  if (WiFi.status() != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    while (WiFi.status() != WL_CONNECTED) {
      WiFi.begin(ssid, pass);
      Serial.print(".");
      delay(5000);
    }
    Serial.println("\nConnected.");
  }
}

void thingspeak_single_write(byte ch, int value) {
  int x = ThingSpeak.writeField(myChannelNumber, ch, value, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Channe " + String(ch) + " update value " + String(value) + " successful.");
  }
  else {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }
}

void thingspeak_multi_write() {
  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey);
  if (x == 200) {
    Serial.println("Multichannel update successful.");
  }
  else {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }
}