[디바이스마트] RS485 테스트

rs485_test.ino

#include <SoftwareSerial.h>

#define R 9
#define G 10
#define B 11

SoftwareSerial mySerial(2, 3);

int pState = HIGH;
byte id = 0;

void setup() {
  mySerial.begin(9600);

  pinMode(R, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);

  digitalWrite(R, LOW);
  digitalWrite(G, LOW);
  digitalWrite(B, LOW);

  pinMode(8, INPUT_PULLUP);
}

void loop() {
  int state = digitalRead(8);

  if (pState == HIGH && state == LOW) {
    mySerial.write(id);

    digitalWrite(R, LOW);
    digitalWrite(G, LOW);
    digitalWrite(B, LOW);

    switch (id) {
      case 0:
        digitalWrite(R, HIGH);
        break;
      case 1:
        digitalWrite(G, HIGH);
        break;
      case 2:
        digitalWrite(B, HIGH);
        break;
      default:
        break;
    }
  }

  pState = state;
  int d;

  while (mySerial.available()) {
    d = mySerial.read();

    digitalWrite(R, LOW);
    digitalWrite(G, LOW);
    digitalWrite(B, LOW);

    switch (d) {
      case 0:
        digitalWrite(R, HIGH);
        break;
      case 1:
        digitalWrite(G, HIGH);
        break;
      case 2:
        digitalWrite(B, HIGH);
        break;
      default:
        break;
    }
  }
  delay(10);
}