#include <WiFi.h>
#include <ThingSpeak.h>
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber =  3216341;
const char * myWriteAPIKey = "DHZTO7QAYVZH2Y1V";
int A=100, statusCode;
void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
}
void loop() {
if(WiFi.status() != WL_CONNECTED)
{
Serial.print("Attempting to connect");
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.");

}
A++;
statusCode = ThingSpeak.writeField(myChannelNumber, 1, A,
myWriteAPIKey);
if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}
delay(15000); // data to be uploaded every 15secs
}