Lesson 6 MIT App Inventor - levizzzle/CS490 GitHub Wiki

//Libraries
#define ledPin 13
#include <HCSR04.h>
#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>
#define RX 2
#define TX 3

//Constants
int triggerPin = 12; //Set trigger pin
int echoPin = 11; //Set echo pin

//Component initializers
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE); //LCD screen configuration
UltraSonicDistanceSensor distanceSensor(triggerPin, echoPin); //Initialize UltraSonic Distance Senor with
SoftwareSerial esp8266(RX,TX); //Initialize ESP8266 using RX & TX

//Variables
double distance;
int state = 0;

//Thingspeak data
String AP = "QuickSpruceGoogle"; //Wifi SSID
String PASS = "1a2b3c4d5e"; //Wifi Password
String API = "DNMZ2HGCARWMABKW"; //Thingspeak API key for channel
String HOST = "api.thingspeak.com"; //Thingspeak API address
String PORT = "80"; //Communication port
int countTrueCommand;
int countTimeCommand; 
boolean found = false; 

void setup() {
  pinMode(ledPin, OUTPUT); //Define ledPin as OUTPUT
  digitalWrite(ledPin, LOW); //Turn LED OFF
  
  Serial.begin(9600); //Begin serial communication
  esp8266.begin(115200); //Begin ESP8266
  
  sendCommand("AT",5,"OK"); //AT command AT
  sendCommand("AT+CWMODE=1",5,"OK"); //AT command AT+CWMODE=1
  sendCommand("AT+CWJAP=\""+ AP +"\",\""+ PASS +"\"",20,"OK"); //AT command AT+CWJAP=\

  lcd.begin(16,2); //Set LCD starting position
  lcd.clear(); //Clear LCD screen
}
void loop() {
  distance = getDistanceData(); //Call function to pull sensor data

  String getData = "GET /update?api_key="+ API +"&"+ "field1" +"="+String(distance); //Create string data
  sendCommand("AT+CIPMUX=1",5,"OK"); //AT command AT+CIPMUX=1
  sendCommand("AT+CIPSTART=0,\"TCP\",\""+ HOST +"\","+ PORT,15,"OK"); //AT command AT+CIPSTART=0
  sendCommand("AT+CIPSEND=0," +String(getData.length()+4),4,">"); //AT command AT+CIPSEND=0
  esp8266.println(getData);delay(1500);countTrueCommand++; //Print getData to ESP8266
  sendCommand("AT+CIPCLOSE=0",5,"OK"); //AT command AT+CIPCLOSE=0
   
  Serial.println(distance); //Print distance to serial
  lcd.clear(); //Clear screen
  lcd.print(distance); //Print distance to LCD
  
 if(Serial.available() > 0){ // Checks whether data is comming from the serial port
    state = Serial.read(); // Reads the data from the serial port
 }
 if (state == '0') {
  digitalWrite(ledPin, LOW); //Turn LED OFF
  Serial.println("LED: OFF"); //Send the String "LED: ON"
  state = 0; //Set state to 0
 }
 else if (state == '1') {
  digitalWrite(ledPin, HIGH); //Turn LED ON
  Serial.println("LED: ON"); //Send the String "LED: ON"
  state = 0; //Set state to 0
 } 
 //delay(4000); //5 second delay
 //Serial.print("");
}

float getDistanceData(){
  return distanceSensor.measureDistanceCm(); //Return sensor reading
;
}

//Function for printing data
void sendCommand(String command, int maxTime, char readReplay[]) {
  //Used for monitoring connection
  //Serial.print(countTrueCommand); //Print count true command to serial
  //Serial.print(". at command => "); //Print descriptor text to serial
  //Serial.print(command); //Print command to serial
  //Serial.print(" "); //Print a space to serial
  while(countTimeCommand < (maxTime*1))
  {
    esp8266.println(command); //Print command to ESP8266
    if(esp8266.find(readReplay)) //If readReplay found
    {
      found = true; //Set found to truw
      break; //Break
    }
  
    countTimeCommand++; //Increment count time command
  }
  
  if(found == true) //If found
  {
    //Serial.println("OYI"); //Print OYI to serial
    countTrueCommand++; //Increment count true command
    countTimeCommand = 0; //Set count time command to 0
  }
  
  if(found == false) //If not found
  {
    //Serial.println("Fail"); //Print Fail to serial
    countTrueCommand = 0; //Set count true command to 0
    countTimeCommand = 0; //Set count time command to 0
  }
  
  found = false; //Set found to false
 }