Komunikasi Serial 2 Arduino UNO - Half Duplex
Simulasi menggunakan: https://www.tinkercad.com/
VR #1 - menggerakan Servo yang terdapat di Arduino #2
VR #2 - menyalakan LED yang terdapat di Arduino #1
Arduino #1
#include <SoftwareSerial.h>
SoftwareSerial SerialBaru(2,3);
const int ledPin = 13; // Built-in LED
const int EnTxPin = 4; // HIGH:Transmitter, LOW:Receiver
void setup()
{
SerialBaru.begin(1200);
SerialBaru.setTimeout(100);
pinMode(ledPin, OUTPUT);
pinMode(EnTxPin, OUTPUT);
digitalWrite(ledPin, LOW);
digitalWrite(EnTxPin, HIGH);
}
void loop()
{
int rdata = analogRead(0); //data from potentiometer
int angle= map(rdata, 0, 1023, 0, 180);
//transmitter data packet
SerialBaru.print("I"); //initiate data packet
SerialBaru.print("S"); //code for servo
SerialBaru.print(angle); //servo angle data
SerialBaru.print("F"); //finish data packet
delay(50);
//receiver data packet
SerialBaru.print("I"); //initiate data packet
SerialBaru.print("L"); //code for sensor
SerialBaru.print("F"); //finish data packet
SerialBaru.flush();
digitalWrite(EnTxPin, LOW); //RS485 as receiver
if(SerialBaru.find("i"))
{
int data=SerialBaru.parseInt();
if(SerialBaru.read()=='f') //finish reading
{
onLED(data);
}
}
digitalWrite(EnTxPin, HIGH); //RS485 as transmitter
}
void onLED(int data)
{
if(data>500)
digitalWrite(ledPin, HIGH);
else
digitalWrite(ledPin, LOW);
}
SoftwareSerial SerialBaru(2,3);
const int ledPin = 13; // Built-in LED
const int EnTxPin = 4; // HIGH:Transmitter, LOW:Receiver
void setup()
{
SerialBaru.begin(1200);
SerialBaru.setTimeout(100);
pinMode(ledPin, OUTPUT);
pinMode(EnTxPin, OUTPUT);
digitalWrite(ledPin, LOW);
digitalWrite(EnTxPin, HIGH);
}
void loop()
{
int rdata = analogRead(0); //data from potentiometer
int angle= map(rdata, 0, 1023, 0, 180);
//transmitter data packet
SerialBaru.print("I"); //initiate data packet
SerialBaru.print("S"); //code for servo
SerialBaru.print(angle); //servo angle data
SerialBaru.print("F"); //finish data packet
delay(50);
//receiver data packet
SerialBaru.print("I"); //initiate data packet
SerialBaru.print("L"); //code for sensor
SerialBaru.print("F"); //finish data packet
SerialBaru.flush();
digitalWrite(EnTxPin, LOW); //RS485 as receiver
if(SerialBaru.find("i"))
{
int data=SerialBaru.parseInt();
if(SerialBaru.read()=='f') //finish reading
{
onLED(data);
}
}
digitalWrite(EnTxPin, HIGH); //RS485 as transmitter
}
void onLED(int data)
{
if(data>500)
digitalWrite(ledPin, HIGH);
else
digitalWrite(ledPin, LOW);
}
Arduino #2
#include <Servo.h>
#include <SoftwareSerial.h>
SoftwareSerial SerialBaru(2,3);
Servo myservo;
const int EnTxPin = 4;
void setup () {
SerialBaru.begin (1200);
myservo.attach (9);
pinMode(EnTxPin, OUTPUT );
digitalWrite (EnTxPin, LOW );
}
void loop (){
if ( SerialBaru.available ()){
if ( SerialBaru.read () == 'I' ){
char function = SerialBaru.read ();
if (function == 'S' ){
int angle = SerialBaru.parseInt ();
if ( SerialBaru.read () == 'F' ){
if (angle <= 180) {
myservo.write (angle);
}
}
}
else if (function == 'L' ){
if ( SerialBaru.read () == 'F' ){
int val = analogRead (0);
digitalWrite (EnTxPin, HIGH ); //enable to transmit
SerialBaru.print ( "i" );
SerialBaru.print (val);
SerialBaru.println ( "f" );
SerialBaru.flush ();
digitalWrite (EnTxPin, LOW ); //enable to receive
}
}
}
}
delay (10);
}
#include <SoftwareSerial.h>
SoftwareSerial SerialBaru(2,3);
Servo myservo;
const int EnTxPin = 4;
void setup () {
SerialBaru.begin (1200);
myservo.attach (9);
pinMode(EnTxPin, OUTPUT );
digitalWrite (EnTxPin, LOW );
}
void loop (){
if ( SerialBaru.available ()){
if ( SerialBaru.read () == 'I' ){
char function = SerialBaru.read ();
if (function == 'S' ){
int angle = SerialBaru.parseInt ();
if ( SerialBaru.read () == 'F' ){
if (angle <= 180) {
myservo.write (angle);
}
}
}
else if (function == 'L' ){
if ( SerialBaru.read () == 'F' ){
int val = analogRead (0);
digitalWrite (EnTxPin, HIGH ); //enable to transmit
SerialBaru.print ( "i" );
SerialBaru.print (val);
SerialBaru.println ( "f" );
SerialBaru.flush ();
digitalWrite (EnTxPin, LOW ); //enable to receive
}
}
}
}
delay (10);
}
Ref:
- Modbus (RS-485) Using Arduino (create.arduino.cc)
