(#1) Work for arduino sensor, load sensor, ultra sonic sensor servo f…

…unctions done

arduino/mainCode/mainCode.ino

@@ -7,7 +7,8 @@
 #include <Servo.h>
 #include <LiquidCrystal_I2C.h>
 #include <Wire.h>
-
+#include <Arduino.h>
+#include "HX711.h"
 
 //for get and post request
 #include <ESP8266HTTPClient.h>
@@ -17,6 +18,14 @@
 const char* ssid = "TP-Link_6DE6";
 const char* password = "AAAAPH69";
 
+const int LOADCELL_DOUT_PIN = 12;
+const int LOADCELL_SCK_PIN = 13;
+
+HX711 scale;
+
+
+int duration;
+int distance;
 String serverName = "http://solanabin.pythonanywhere.com";
 String uid = "1a77d81f-4ed4-45f0-bdf6-c8980cbfac1e";
 // for nodemcu pins 
@@ -53,18 +62,42 @@ String uid = "1a77d81f-4ed4-45f0-bdf6-c8980cbfac1e";
 
  Servo servo1;
  Servo servo2;
+ const int trigP = 0;  //D3 Or GPIO-2 of nodemcu
+ const int echoP = 2;  //D4 Or GPIO-0 of nodemcu
+ int posn=0;
  int angle;
  LiquidCrystal_I2C lcd(0x3F, 16, 2);
 
 unsigned long lastTime = 0;
  // for nodemcu
 
+void ultrasonicSetup() {
+  pinMode(trigP, OUTPUT);
+  pinMode(echoP, INPUT);
+}
+
 void lcdSetup() {
 
  lcd.begin();
  lcd.home();
  lcd.print("Hello, NodeMCU"); 
 }
+
+int getDistanceFromUltrasonic() {
+
+digitalWrite(trigP, LOW);   // Makes trigPin low
+delayMicroseconds(2);       // 2 micro second delay 
+
+digitalWrite(trigP, HIGH);  // tigPin high
+delayMicroseconds(10);      // trigPin high for 10 micro seconds
+digitalWrite(trigP, LOW);   // trigPin low
+
+duration = pulseIn(echoP, HIGH);   //Read echo pin, time in microseconds
+distance= duration*0.034/2;        //Calculating actual/real distance
+return distance;
+}
+
+
 void setupWifi() {
   WiFi.begin(ssid,password);
   Serial.println("Connecting");
@@ -85,32 +118,61 @@ void attachServo() {
 }
 
 void openDustbin() {
+  Serial.println("opening Dustbin");
   int posn = 180;
     for (posn = 180; posn >=90; posn -= 1)            // goes from 0 degrees to 180 degrees
  {                                                                       // in steps of 1 degree
     servo1.write (posn);
     servo2.write(180-posn);// tell servo to go to position in variable 'pos'
-    delay (10);                                       // waits 10ms for the servo to reach the position
+    delay (5);                                       // waits 10ms for the servo to reach the position
   }
 }
 
 void closeDustbin(){
+  Serial.println("closing dustbin");
   int posn = 90;
       for (posn = 90; posn <=180; posn += 1)            // goes from 0 degrees to 180 degrees
  {                                                                       // in steps of 1 degree
     servo1.write (posn);
     servo2.write(180-posn);// tell servo to go to position in variable 'pos'
-    delay (10);                                       // waits 10ms for the servo to reach the position
+    delay (5);                                       // waits 10ms for the servo to reach the position
   }
 }
-
+
+
 void setup() {
-  Serial.begin(115200);
+  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
+  ultrasonicSetup();
   setupWifi();
-  //attachServo();
+  attachServo();
+  Serial.begin(115200);
+
+
+
+  scale.set_scale(2.0052);
+
+                       // this value is obtained by calibrating the scale with known weights; see the README for details
 
 }
 
+//void loop() {
+//  delay(5000);
+//  openDustbin();
+//  delay(5000);
+//  closeDustbin(); 
+//  delay(1000);
+//  int i = getDistanceFromUltrasonic();
+//  delay(1000);
+//   Serial.println(i);
+//   Serial.println("data from scale");
+//
+//}
+
+
+
+
+
+
 // the loop function runs over and over again forever
 void loop() {
   if((millis() - lastTime) > 5000) {
@@ -130,18 +192,34 @@ void loop() {
 
             // if we want to open the dustbin
            // openDustbin();
-
+            bool weightAdded = false;
+            float m = 0;
+            int b_height = 0;
+            for(int i =0; i <= 12; i++) {
+              float k =  scale.read_average(20); //get load sensor value
+              if(abs(k-m) > 300) {
+                // weight was added
+                weightAdded = true;
+                break;
+              }
+              delay(1000);
+            int height = getDistanceFromUltrasonic(); // get the height using ultrasonic sensor
 
-//            for(int i =0; i <= 12; i++) {
-//            
-//               // get the load sensor value
-//            // get the height using ultrasonic sensor
-//            // show it on our LCD
-// delay(5000);
-//              
-//            }
+            if(abs(height-b_height) > 3) {
+              delay(100);
+              height = getDistanceFromUltrasonic();
+              if(abs(height-b_height) > 3) {
+                weightAdded = true;
+                break;
+              }
+            }
+            m = k;
+            b_height = height;
+            delay(5000);
+            }
+            if(weightAdded) {
             http.end();
-         
+
             String postServerPath = serverName + "/unit_value_history/" + uid + "/";
               http.begin(client,postServerPath);
               http.addHeader("Content-Type","application-json");
@@ -154,11 +232,13 @@ void loop() {
               }
               Serial.println(postResponseCode);
             Serial.println("it means open");
+            closeDustbin();
           }
 
         }else{
           Serial.println(httpResponseCode);
         }
+    }
         http.end();
 
     }else{