Arduino

IOT Professional elective IOT: A dynamic globan network infrastructure with a self-configuring capability based on standard protocols and inter operatble communication protocols where physical and virtual things have identities, physical attributes, and virtual personalities use intelligent interfaces and are seamlessly integrated into the information network often communicate data associated with users and external environment. Charecteristics Dynamic and self-configuring Self configuring Interopeable communications protocols Unique identity Integrated info network Block diagram of an iot device ...

Motor Encoder Components Arduino Uno 4x4 Keypad I2C LCD DC Motor with encoder L293D Motor Driver Connections Display connections From (I2C display) To (arduino) 1 VCC 5V 2 GND GND 3 SDA SDA 4 SCL SCL Keypad connections From (Keypad) To (arduino) 1 Row 1 D13 2 Row 2 D12 3 Row 3 D11 4 Row 4 D10 5 Col 1 D9 6 Col 2 D8 7 Col 3 D7 8 Col 4 D4 Motor connections From (Motor) To 1 Motor negative Output 4 (L293D) 2 Motor positive Output 3 (L293D) 3 Encoder ground GND (L293D) 4 Channel B D3 (arduino) 5 Channel A D2 (arduino) 6 Encoder power 5V (arduino) L293D connections From (L293D) To (arduino) 1 Power 1 5V 2 Input 4 D5 3 Output 4 refer above 4 Ground GND (both arduino/motor) 5 Ground GND (both arduino/motor) 6 Output 3 refer above 7 Input 3 D6 8 Enable 3,4 5V 9 Enable 1,2 5V 10 Input 1 N/A 11 Output 1 N/A 12 Ground GND 13 Ground GND 14 Output 2 N/A 15 Input 2 N/A 16 Power 2 5V Code 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 // ---------- // keypad setup #include <Keypad.h> const byte numRows= 4; //number of rows on the keypad const byte numCols= 4; //number of columns on the keypad // global keypad variables String enteredValue = ""; int encoderSpeed = 0; float debugEncoderSpeed = 0.00; // (encoderSpeed * 100) / 255 //keymap defines the key pressed according to the row and columns just as appears on the keypad char keymap[numRows][numCols]= { {'1', '2', '3', 'A'}, {'4', '5', '6', 'B'}, {'7', '8', '9', 'C'}, {'*', '0', '#', 'D'} }; //Code that shows the the keypad connections to the arduino terminals byte rowPins[numRows] = {13,12,11,10}; //Rows 0 to 3 byte colPins[numCols]= {9,8,7,4}; //Columns 0 to 3 Keypad myKeypad= Keypad(makeKeymap(keymap), rowPins, colPins, numRows, numCols); // ---------- // lcd setup #include <Adafruit_LiquidCrystal.h> Adafruit_LiquidCrystal lcd_1(0); int LCDRow = 0; #define motorA 5 #define motorB 6 int encoderPin1 = 2; int encoderPin2 = 3; volatile int lastEncoded = 0; volatile long encoderValue = 0; volatile long correctEncoderValue =0; long lastencoderValue = 0; int lastMSB = 0; int lastLSB = 0; void setup() { Serial.begin (9600); pinMode(encoderPin1, INPUT); pinMode(encoderPin2, INPUT); digitalWrite(encoderPin1, HIGH); //turn pullup resistor on digitalWrite(encoderPin2, HIGH); //turn pullup resistor on attachInterrupt(0, updateEncoder, CHANGE); attachInterrupt(1, updateEncoder, CHANGE); pinMode(motorA,OUTPUT); pinMode(motorB,OUTPUT); lcd_1.begin(16, 2); lcd_1.print("Enter value:"); lcd_1.setCursor(LCDRow, 10); } void loop() { // encoder control statements correctEncoderValue = encoderValue/4; Serial.println(correctEncoderValue); if ( 0<=correctEncoderValue && correctEncoderValue < 3000) { analogWrite(motorA,encoderSpeed); digitalWrite(motorB,LOW); } else { analogWrite(motorA,0); digitalWrite(motorB,LOW); } delay(100); // keypad control statements char keypressed = myKeypad.getKey(); if (keypressed != NO_KEY) { Serial.println(keypressed); } // getting the key pressed from the user if (keypressed){ // gets triggered for numeric key presses if (keypressed != 'D' && keypressed != 'A' && keypressed != 'B' && keypressed != 'C') { Serial.println(keypressed); lcd_1.print(keypressed); lcd_1.setCursor(++LCDRow, 10); enteredValue += keypressed; // a - clear the entered value } else if (keypressed == 'A') { lcd_1.clear(); lcd_1.print("Enter value:"); lcd_1.setCursor(++LCDRow, 10); enteredValue = ""; encoderSpeed = 0; // d - update the entered value } else { LCDRow = 0; lcd_1.clear(); lcd_1.print("Value updated"); delay(500); // taking the encoder speed from the user // encoder value lies between 0 and 255 // we take the value only if its between 0 and 255 if (enteredValue == "") { encoderSpeed = 0; Serial.println("Case 1: Blank entered value"); } else if (enteredValue.toInt() > 0 && enteredValue.toInt() < 255) { encoderSpeed = enteredValue.toInt(); Serial.println("Case 2: Accepted entered value"); } else { encoderSpeed = 0; Serial.println("Case 3: Out of of bounds entered value"); } } // special keypresses end } // keypressed trigger end debugEncoderSpeed = (encoderSpeed * 100) / 255; Serial.println(debugEncoderSpeed); } void updateEncoder(){ int MSB = digitalRead(encoderPin1); //MSB = most significant bit int LSB = digitalRead(encoderPin2); //LSB = least significant bit int encoded = (MSB << 1) |LSB; //converting the 2 pin value to single number int sum = (lastEncoded << 2) | encoded; //adding it to the previous encoded value if(sum == 0b1101 || sum == 0b0100 || sum == 0b0010 || sum == 0b1011) encoderValue ++; if(sum == 0b1110 || sum == 0b0111 || sum == 0b0001 || sum == 0b1000) encoderValue --; lastEncoded = encoded; //store this value for next time } How to use this Click the link below and press simulate. You can see the debug output in the serial monitor. To enter a value press a key on the keypad. To update the value press D and to clear the value press A. ...

Arduino 14 IO, 6// ESP 8266 wifi Sketch - name of the program Setup - IO setup Loop - while loop DHT 11 sol moisture SR04 ultrasonic HC05 bluetooth ESP 01 wifi Q. LED blink 1 2 3 4 5 6 7 8 9 10 11 const int ledVar = 13; void setup() { pinMode(ledVar, OUTPUT); } void loop() { digitalWrite(ledVar, HIGH); delay(1000); digitalWrite(ledVar, LOW); delay(1000); } Q. Interface dht 11 with arduino uno and display humidity and temperature on serial monitor 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 #include <dht.h> dht DHT; #define dhtPin 4 void setup() { Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: int val = DHT.read11(dhtPin); Serial.print("Temprature: "); Serial.println(DHT.temperature); Serial.print("Humidity: "); Serial.println(DHT.humidity); delay(2000); } If else 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 // Q. Interface dht 11 with arduino uno and display humidity and temperature on serial monitor #include <dht.h> dht DHT; #define dhtPin 4 const int ledVar = 13; void setup() { Serial.begin(9600); pinMode(ledVar, OUTPUT); } void loop() { // put your main code here, to run repeatedly: int val = DHT.read11(dhtPin); Serial.print("Temprature: "); // float temp = DHT.temperature; if ( DHT.temperature > 25.00) { digitalWrite(ledVar, HIGH); } else { digitalWrite(ledVar, LOW); } Serial.println(DHT.temperature); Serial.print("Humidity: "); Serial.println(DHT.humidity); delay(2000); } Button operation 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 const char led1 = A5; const char led2 = A4; const char led3 = A3; const char led4 = A2; const int b1 = 13; const int b2 = 12; const int b3 = 11; const int b4 = 10; int buttonState1, buttonState2, buttonState3, buttonState4; void setup() { // put your setup code here, to run once: pinMode(led1, OUTPUT); pinMode(led2, OUTPUT); pinMode(led3, OUTPUT); pinMode(led4, OUTPUT); pinMode(b1, INPUT); pinMode(b2, INPUT); pinMode(b3, INPUT); pinMode(b4, INPUT); Serial.begin(9600); } void loop() { // put your main code here, to run repeatedl if (digitalRead(b1) == LOW) { digitalWrite(led1, HIGH); digitalWrite(led2, LOW); digitalWrite(led3, LOW); digitalWrite(led4, LOW); } else if (digitalRead(b2) == LOW){ digitalWrite(led1, LOW); digitalWrite(led2, HIGH); digitalWrite(led3, LOW); digitalWrite(led4, LOW); } else if (digitalRead(b3) == LOW){ digitalWrite(led1, LOW); digitalWrite(led2, LOW); digitalWrite(led3, HIGH); digitalWrite(led4, LOW); } else if (digitalRead(b4) == LOW){ digitalWrite(led1, LOW); digitalWrite(led2, LOW); digitalWrite(led3, LOW); digitalWrite(led4, HIGH); } else { digitalWrite(led1, LOW); digitalWrite(led2, LOW); digitalWrite(led3, LOW); digitalWrite(led4, LOW); } } LCD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 #include <LiquidCrystal.h> const int rs = 6, en = 7, d4 = 5, d5 = 4, d6 = 3, d7 = 2; LiquidCrystal lcd(rs, en, d4, d5, d6, d7); void setup() { lcd.begin(16,2); lcd.print(" Hello "); lcd.setCursor(0,1); lcd.print(" World "); } void loop() { // put your main code here, to run repeatedly: lcd.noDisplay(); lcd.display(); delay(5000); } IoT internship project 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 /*Problem statement Interface LCD with Arduino Uno to display the right to left scrolling message IoT Internship */ // title, problem statement, onjective, components, interfacing block diagram // libraries #include <LiquidCrystal.h> // programming constants const int rs = 6, en = 7, d4 = 5, d5 = 4, d6 = 3, d7 = 2; LiquidCrystal lcd(rs, en, d4, d5, d6, d7); int initialDelay = 1000; int pixelDelay = 300; char message[] = "IoT Internship"; void setup() { lcd.begin(16, 2); lcd.print(message); delay(initialDelay); } void loop() { // given count values to properly scroll through the screen for (int positionCounter = 0; positionCounter < 13; positionCounter++) { lcd.scrollDisplayLeft(); delay(pixelDelay); } for (int positionCounter = 0; positionCounter < 29; positionCounter++) { lcd.scrollDisplayRight(); delay(pixelDelay); } for (int positionCounter = 0; positionCounter < 16; positionCounter++) { lcd.scrollDisplayLeft(); delay(pixelDelay); } delay(1000); }