KMTronic DINo UDP to RS485 example

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Test software

KMTronic DINo 4 Relay UDP Test Software.zip

Monitoring software

(using USB<>RS485 adapter)

SerialWatcher

Source code

#include "EtherShield.h"

uint8_t mymac[6] = {0xCF,0x70,0x7C,0xE4,0x8A,0xB8};
uint8_t myip[4] = {192,168,1,25};
uint16_t MYWWWPORT = 80;

#define BUFFER_SIZE 750
static uint8_t buf[BUFFER_SIZE+1];

char reply[]="Realized";

const int RS485_control = 3;
//Set this pin to high when you want to send data from RS485//

static uint8_t udp_length;
static uint8_t udp_buffer[50];

EtherShield es=EtherShield();

uint16_t plen, dat_p;

///----------------------------------------------------------
void setup(){
 
  pinMode(RS485_control, OUTPUT);
  digitalWrite(RS485_control, HIGH); // Set pin to send data
 
  Serial.begin(9600);
  es.ES_enc28j60Init(mymac);
  es.ES_init_ip_arp_udp_tcp(mymac,myip, MYWWWPORT);

} // end setup
///----------------------------------------------------------
void loop(){
 
    // read packet, handle ping and wait for a tcp packet:
    dat_p=es.ES_packetloop_icmp_tcp(buf,es.ES_enc28j60PacketReceive(BUFFER_SIZE, buf));
    
    if (buf[IP_PROTO_P]==IP_PROTO_UDP_V){
      
       udp_length=buf[39]-8; // calculate UDP data lenght
       
       for (int i = 0; i < udp_length; i++)
        {
          Serial.write(buf[42+i]);
        }
       es.ES_make_udp_reply_from_request(buf,reply,8,12345);
       buf[IP_PROTO_P]=0;
    }    
    
} // end loop