Subversion Repositories Arduino.arduino

/*
  Modbus-Arduino Example - TempSensor (Modbus IP)
  Copyright by André Sarmento Barbosa
  http://github.com/andresarmento/modbus-arduino
*/
 
#include <SPI.h>
#include <Ethernet.h>
#include <Modbus.h>
#include <ModbusIP.h>

//Modbus Registers Offsets (0-9999)
const int SENSOR_IREG = 100; 
//Used Pins
const int sensorPin = A0;

//ModbusIP object
ModbusIP mb;

long ts;

void setup() {
    // The media access control (ethernet hardware) address for the shield
    byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };  
    // The IP address for the shield
    byte ip[] = { 192, 168, 1, 120 };   
    //Config Modbus IP 
    mb.config(mac, ip);

    // Add SENSOR_IREG register - Use addIreg() for analog Inputs
    mb.addIreg(SENSOR_IREG);
    
    ts = millis();
}

void loop() {
   //Call once inside loop() - all magic here
   mb.task();
   
   //Read each two seconds
   if (millis() > ts + 2000) {   
       ts = millis();
       //Setting raw value (0-1024)
       mb.Ireg(SENSOR_IREG, analogRead(sensorPin));
   } 
}