Initial commit

iot_soil_moisture_master.ino

+//Libraries
+#include "ThingSpeak.h"
+#include <WiFi.h>
+#include <SPI.h>
+
+//Program variables
+int sInput1;
+int sInput2;
+int sInput3;
+int vccPin = 12;
+int average;
+int debugID = 1;
+
+//Connectivity variables
+char ssid[] = "BTHub5-MKS7";
+char pass[] = "42d6789b8d";
+int status = WL_IDLE_STATUS;
+WiFiClient client;
+
+//ThingSpeak variables
+unsigned long myChannelNumber = 640257;
+const char * myWriteAPIKey = "BRO3JQU737EE4WN9";
+int timer = 24;
+
+//Setup
+void setup() {
+  Serial.begin(9600); 
+  Serial.println("Program starting.");
+  Serial.println(" ");
+  pinMode(vccPin, OUTPUT);
+  pinMode(10, OUTPUT);
+  digitalWrite(10, LOW);
+  //check for the presence of the shield:
+  if (WiFi.status() == WL_NO_SHIELD) {
+    Serial.println("WiFi shield not present");
+    // don't continue:
+    while (true);
+  }
+
+  String fv = WiFi.firmwareVersion();
+  if (fv != "1.1.0") {
+    Serial.println("Please upgrade the firmware");
+  }
+    
+  ThingSpeak.begin(client);
+}
+
+//Loop
+void loop() {
+  connectToWPA();
+  delay(2000);
+  Serial.println("Reading data.");
+  sInput1 = analogRead(A0);
+  sInput2 = analogRead(A1);
+  sInput3 = analogRead(A2);
+  average = ((sInput1 + sInput2 + sInput3)/3);
+  Serial.println("Attempting to send data");
+  //int x = ThingSpeak.writeField(myChannelNumber, 1, average, myWriteAPIKey);
+
+  ThingSpeak.setField(1, average);
+  ThingSpeak.setField(2, timer);
+  int x = ThingSpeak.writeFields(myChannelNumber, myWriteAPIKey); 
+  //x is the return code for HTTP. 200 means that the data was successfully transmitted.
+  if(x == 200){
+    Serial.println("Channel update successful.");
+    Serial.print("Moisture value sent: ");
+    Serial.println(average);
+    Serial.print("Timer value sent: ");
+    Serial.println(timer);
+  }
+  else{
+    Serial.println("Problem updating channel. HTTP error code " + String(x));
+  }
+  //15 mins delay
+  delay(900000);
+  
+  debug();
+}
+
+//debug() takes and prints the current readings for each of the three sensors and then prints their average reading. 
+//It is used for debugging only.
+void debug() {
+  digitalWrite(vccPin, HIGH);
+  sInput1 = analogRead(A0);
+  sInput2 = analogRead(A1);
+  sInput3 = analogRead(A2);
+  average = ((sInput1 + sInput2 + sInput3)/3);
+  Serial.print("Debug ID: ");
+  Serial.println(debugID);
+  debugID++;
+  Serial.println(" ");
+  Serial.print("Input 1: ");
+  Serial.println(sInput1);
+
+  Serial.print("Input 2: ");
+  Serial.println(sInput2);
+
+  Serial.print("Input 3: ");
+  Serial.println(sInput3);
+  Serial.println(" ");
+  Serial.print("Average reading: ");
+  Serial.println(average);
+  Serial.println(" ");
+  Serial.println(" ");
+  //digitalWrite(vccPin, LOW);
+  delay(5000);
+}
+
+void connectToWPA() {
+  if(WiFi.status() != WL_CONNECTED){
+    Serial.print("Attempting to connect to SSID: ");
+    Serial.println(ssid);
+    while(WiFi.status() != WL_CONNECTED){
+      digitalWrite(10, LOW);
+      WiFi.begin(ssid, pass);
+      Serial.print(".");
+      delay(5000);     
+    } 
+    Serial.println("\nConnected.");
+    digitalWrite(10, HIGH);
+  }
+}