#include <WiFi.h>
#include <ThingSpeak.h>
//wifi setup line
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber =2441340;
const char * myWriteAPIKey = "8Q9J0CQOMGPTJ6F4";
int statusCode;
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
//
//wifi mode setup
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
pinMode(27, OUTPUT);
pinMode(25, INPUT);
pinMode(32, OUTPUT);
}
void loop() {
//wifi connection setup
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.");
}
digitalWrite(27, HIGH);
delay(1000);
digitalWrite(27, LOW);
float a=pulseIn(25,HIGH);
long distance=(a*0.034)/2;
Serial.println("Object distance is "+ String(distance));
if(distance<=200){
digitalWrite(32, HIGH);
}
else{
digitalWrite(32, LOW);
}
ThingSpeak.setField(1,distance);
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(15000);
}