MAX485 module TTL to RS-485 (มีสต็อกสินค้าในประเทศไทยพร้อมจัดส่ง) สำหรับ Arduino

MAX485 module RS485 module TTL to RS-485
Features:
Onboard MAX485 chip provides a low power consumption for RS-485 communication.
Onboard 5.08 (mm) pitch 2P terminals to facilitate the RS-485 communication wiring.
All of the pins have been led by the MCU control operations
Working voltage: 5V
Board size: 44 x14mm

Programa Transmissor RS485
//Programa: Comunicação RS485 com Arduino - Transmissor
//Autor: Arduino e Cia

#include

//Pinos de comunicacao serial do modulo RS485
#define Pino_RS485_RX 10
#define Pino_RS485_TX 11

//Pino de controle transmissao/recepcao
#define SSerialTxControl 3

#define RS485Transmit HIGH
#define RS485Receive LOW

//Define led 13 para mostrar atividade na comunicacao
#define Pin13LED 13

//Cria a serial por sofware para conexao com modulo RS485
SoftwareSerial RS485Serial(Pino_RS485_RX Pino_RS485_TX);

void setup()
{
//Inicializa a serial do Arduino
Serial.begin(9600);
Serial.println(Modulo Transmissor);
Serial.println(Pressione o botao para enviar os dados...);

pinMode(Pin13LED OUTPUT);
pinMode(SSerialTxControl OUTPUT);

//Inicializa a serial do modulo RS485
RS485Serial.begin(4800);

//Seta o pino A0 como entrada e habilita o pull up
pinMode(A0 INPUT_PULLUP);
}

void loop()
{
//Verifica se o botao foi pressionado
int valor = digitalRead(A0);
if (valor == 0)
{
Serial.println(Botao pressionado. Enviando dados!);

//Habilita o modulo para transmissao
digitalWrite(SSerialTxControl RS485Transmit);

//Envia a string
RS485Serial.println(Botao acionado);

//Liga o led 13 para mostrar que ha conexao
digitalWrite(Pin13LED HIGH);
delay(10);
digitalWrite(Pin13LED LOW);

//Desabilita o modulo para transmissao
digitalWrite(SSerialTxControl RS485Receive);
while (digitalRead(A0) == 0)
{
delay(50);
}
}
}

Programa Receptor RS485
//Programa: Comunicação RS485 com Arduino - Receptor
//Autor: Arduino e Cia

#include

//Pinos de comunicacao serial do modulo RS485
#define Pino_RS485_RX 10
#define Pino_RS485_TX 11

//Pino de controle transmissao/recepcao
#define SSerialTxControl 3

#define RS485Transmit HIGH
#define RS485Receive LOW

//Define led 13 para mostrar atividade na comunicacao
#define Pin13LED 13

//Cria a serial por sofware para conexao com modulo RS485
SoftwareSerial RS485Serial(Pino_RS485_RX Pino_RS485_TX);

//Armazena os dados que chegam pela serial
String inputString = ;
//Variavel de string completa
boolean stringComplete = false;

void setup()
{
//Inicializa a serial do Arduino
Serial.begin(9600);
Serial.println(Modulo Receptor);
Serial.println(Aguardando dados...);

pinMode(Pin13LED OUTPUT);
pinMode(SSerialTxControl OUTPUT);

//Coloca o modulo RS485 em modo de recepcao
digitalWrite(SSerialTxControl RS485Receive);

//Inicializa a serial do modulo RS485
RS485Serial.begin(4800);
}

void loop()
{
//Recebe os dados do RS485 via porta serial
if (RS485Serial.available())
{
while (RS485Serial.available())
{
//Recebe os dados e monta a string
char inChar = (char)RS485Serial.read();
inputString += inChar;

if (inChar == n)
{
//Mostra no Serial Monitor a string recebida
Serial.print(inputString);
stringComplete = true;
inputString = ;
}
}
}
}

MAX485 module TTL to RS-485 (มีสต็อกสินค้าในประเทศไทยพร้อมจัดส่ง) สำหรับ Arduino

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MAX485 module TTL to RS-485 (มีสต็อกสินค้าในประเทศไทยพร้อมจัดส่ง) สำหรับ Arduino

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