#include <WiFi.h>
#include <ThingSpeak.h>
#include <HX711.h>
#define DATA_PIN 15
#define CLOCK_PIN 2
HX711 hx711;
long units;
int buzzer = 13;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2500249;
const char * myWriteAPIKey = "1VODBX4AIHVZ1BBF";
int statusCode;
void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
hx711.begin(DATA_PIN, CLOCK_PIN);
hx711.set_scale(420.0983);
hx711.tare();
pinMode(buzzer, OUTPUT);
}
//String normal="normal";
// int overload="overload";
int n=0;
int i;
void loop() {
units = hx711.get_units();
int v=map(units,0,50,0,3500);
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.");
}
// Serial.println(units);
if(v>2500){
i=-1;
//Serial.println(units);
tone(buzzer, 1000);
n=1;
//delay(1000);
}
else if(v<500)
{
i=0;
noTone(buzzer);
n=2;
}
else {
i=v;
//ThingSpeak.setField(1,units);
noTone(buzzer);
n=2;
}
Serial.println(i);
ThingSpeak.setField(1,i);
if(n==1){
ThingSpeak.setField(2, 000);
}
//ThingSpeak.setField(1,units);
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);
}