Percobaan 5
1. Prosedur [Kembali]
Rangkailah seperti rangkaian berikut
Buka Arduino IDE dan buat listing program sesuai percobaan, upload program ke arduino IDE
Variasikan tombol yang ditekan sesuai dengan isi dari program.
2. Hardware dan Diagram Blok [Kembali]
a. Arduino
b. LED
c. I2C
- Rangkaian
- Prinsip Kerja
Percobaan ini menunjukkan hubungan komunikasi data antar 2 perangkat arduino Uno yang terhubung dengan I2C dimana, terdapat arduino yang berfungsi sebagai master untuk mengirimkan informasi berdasarkan input diberikan pada button berupa nyala lampu LED dengan skema komunikasi data serial.
Dalam hal ini, button berfungsi sebagai input dan LED berfungsi sebagai output yang akan mati, menyala, dan berkedip sesuai dengan program yang diberikan pada arduino IDE.
- Flowchart
- Listing Program
//Master
#include <Wire.h>
#define SLAVE_ADDRESS 9 // Slave Arduino address
#define BUTTON1 2 // Pin for the push button
#define BUTTON2 3
int buttonState1 = 0;
int buttonState2 = 0;
int buttonPrevState1 = 0;
int buttonPrevState2 = 0;
unsigned int counter = 0;
unsigned int count = 0;
void setup() {
Wire.begin(); // Initialize I2C communication
pinMode(BUTTON1, INPUT_PULLUP); // Set button pin as input with internal pull-up resistor
pinMode(BUTTON2, INPUT_PULLUP);
Serial.begin(9600); // Initialize serial communication for debugging
}
void loop() {
buttonState1 = digitalRead(BUTTON1);
buttonState2 = digitalRead(BUTTON2);
if (buttonState2 != buttonPrevState2){
if(buttonState2 == LOW){
count++;
}
delay(50);
}
buttonPrevState2 = buttonState2;
if(count > 3){
count = 0;
}
if(count % 2 == 0){
if (buttonState1 != buttonPrevState1) {
if (buttonState1 == LOW) {
// Button is pressed
counter++;
Wire.beginTransmission(SLAVE_ADDRESS);
Wire.write(counter); // Send command to the slave
Wire.endTransmission();
}
delay(50); // Debouncing delay
}
buttonPrevState1 = buttonState1;
if(counter > 3){
counter = 0;
}
}else if(count % 3 == 0){
Wire.endTransmission();
}
Serial.print(count); Serial.println(counter);
}
//Slave
#include <Wire.h>
#define LED_COUNT 8
#define LED_PIN_START 2 // Start pin for the LEDs
void setup() {
Serial.begin(9600);
Wire.begin(9); // Initialize I2C communication as Slave with address 9
Wire.onReceive(receiveEvent); // Register event for receiving data
for (int i = LED_PIN_START; i < LED_PIN_START + LED_COUNT; i++) {
pinMode(i, OUTPUT); // Set LED pins as output
}
}
void loop() {
// Nothing to do here, all actions are performed in the receiveEvent function
}
void receiveEvent(int numBytes) {
unsigned int command = Wire.read(); // Read incoming command from master
Serial.println(command);
delay(500);
if (command == 1) {
// Turn all LEDs ON
for (int i = LED_PIN_START; i < LED_PIN_START + LED_COUNT; i++) {
digitalWrite(i, HIGH);
}
} else if (command == 2) {
// Turn all LEDs OFF
for (int i = LED_PIN_START; i < LED_PIN_START + LED_COUNT; i++) {
digitalWrite(i, LOW);
}
} else if (command == 3) {
// Blink all LEDs
for (int j = 0; j < 5; j++) { // Repeat the blinking 5 times
for (int i = LED_PIN_START; i < LED_PIN_START + LED_COUNT; i++) {
digitalWrite(i, HIGH);
delay(1000);
}
delay(500); // Delay for ON state
for (int i = LED_PIN_START; i < LED_PIN_START + LED_COUNT; i++) {
digitalWrite(i, LOW);
delay(1000);
}
delay(500); // Delay for OFF state
}
}
}
Kondisi diberikan sesuai dengan percobaan 5 pada modul 3.
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