/* YourDuino SoftwareSerialExample1
- Connect to another Arduino running "YD_SoftwareSerialExampleRS485_1Remote"
- Connect this unit Pins 10, 11, Gnd
- Pin 3 used for RS485 direction control
- To other unit Pins 11,10, Gnd (Cross over)
- Open Serial Monitor, type in top window.
- Should see same characters echoed back from remote Arduino
Questions: terry@yourduino.com
*/
/*-----( Import needed libraries )-----*/
#include <SoftwareSerial.h>
/*-----( Declare Constants and Pin Numbers )-----*/
#define SSerialRX 10 //Serial Receive pin
#define SSerialTX 11 //Serial Transmit pin
#define SSerialTxControl 3 //RS485 Direction control
#define RS485Transmit HIGH
#define RS485Receive LOW
#define Pin13LED 13
/*-----( Declare objects )-----*/
SoftwareSerial RS485Serial(SSerialRX, SSerialTX); // RX, TX
/*-----( Declare Variables )-----*/
int byteReceived;
int byteSend;
void setup() /****** SETUP: RUNS ONCE ******/
{
// Start the built-in serial port, probably to Serial Monitor
Serial.begin(9600);
Serial.println("YourDuino.com SoftwareSerial remote loop example");
Serial.println("Use Serial Monitor, type in upper window, ENTER");
pinMode(Pin13LED, OUTPUT);
pinMode(SSerialTxControl, OUTPUT);
digitalWrite(SSerialTxControl, RS485Receive); // Init Transceiver
// Start the software serial port, to another device
RS485Serial.begin(4800); // set the data rate
}//--(end setup )---
void loop() /****** LOOP: RUNS CONSTANTLY ******/
{
digitalWrite(Pin13LED, HIGH); // Show activity
if (Serial.available())
{
byteReceived = Serial.read();
digitalWrite(SSerialTxControl, RS485Transmit); // Enable RS485 Transmit
RS485Serial.write(byteReceived); // Send byte to Remote Arduino
digitalWrite(Pin13LED, LOW); // Show activity
delay(10);
digitalWrite(SSerialTxControl, RS485Receive); // Disable RS485 Transmit
}
if (RS485Serial.available()) //Look for data from other Arduino
{
digitalWrite(Pin13LED, HIGH); // Show activity
byteReceived = RS485Serial.read(); // Read received byte
Serial.write(byteReceived); // Show on Serial Monitor
delay(10);
digitalWrite(Pin13LED, LOW); // Show activity
}
}//--(end main loop )---
/*-----( Declare User-written Functions )-----*/
//NONE
//*********( THE END )***********
