#include <WiFi.h>
#include <ThingSpeak.h>
const int ledPin= 15;
const int trig = 5;
const int echo = 18;
float distance;
long duration;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2640725;
const char * myWriteAPIKey = "MBB6FBG38JZBZ3FJ";
int statusCode;
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
delay(1500);
pinMode(ledPin, OUTPUT);
pinMode(trig, OUTPUT);
pinMode(echo, INPUT);
}
long getdistance(){
digitalWrite(trig, LOW);
delayMicroseconds(2);
digitalWrite(trig, HIGH);
delayMicroseconds(10);
digitalWrite(trig, LOW);
duration = pulseIn(echo, HIGH);
return(duration*0.034/2);
Serial.println(duration);
}
void loop() {
if(WiFi.status() != WL_CONNECTED)
{
Serial.print("Attempting to connect");
while(WiFi.status() != WL_CONNECTED)
{
WiFi.begin(ssid, pass);
Serial.print(".");
delay(5000);
}
Serial.println("\nConnected.");
}
if(getdistance()>200)
{
analogWrite(ledPin,LOW);
ThingSpeak.setField(2, 0);
Serial.println("OFF");
}
else
{
analogWrite(ledPin,HIGH);
ThingSpeak.setField(2, 1);
Serial.println("ON");
}
delay(10); // this speeds up the simulation
Serial.println(getdistance());
ThingSpeak.setField(1, getdistance());
statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
if(statusCode == 200) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
}
delay(1000);
}