http://www.info.kmtronic.com/software/Raspberry_PI/Raspberry_PI_KMTronic_USB_Relay.zip

USB One Relay commands:

 FF 01 00 - OFF command

FF 01 01 - ON command

                   FF 01 03 - Status request command

> FF 01 xx - Reply from relay

where xx is status: 01 - Relay is ON, 00 - Relay is OFF

Set baudrate to 9600b/s

Switch ON relay

Switch OFF relay

Status request

Turn OFF Wi-Fi Internet if you using Laptop PC.

Open ‘Network and Sharing Center’ and go to ‘Local Area Connection’ properties.

Set as show in next screenshots:

Connect to PC direct !!!

Open Explorer and type 192.168.1.199 and press Enter.

If all is right you will see Login menu board.

Type ‘admin’ ‘admin’ and go to Configuration page, change Board IP address, Gateway IP address and click Save Config.

Master (Inputs) Code

#include "EtherShield.h"

uint8_t mymac[6] = {0xCF,0x70,0x7C,0xE4,0x8A,0xB9}; // Master MAC
uint8_t myip[4] = {192,168,1,26};  // Master IP
uint8_t udpmac[6] = {0xCF,0x70,0x7C,0xE4,0x8A,0xB8}; // Slave MAC
uint8_t udpip[4] = {192,168,1,25}; // Slave IP
#define DEST_PORT_L  0x34
#define DEST_PORT_H  0x12

const char iphdr[] PROGMEM ={0x45,0,0,0x82,0,0,0x40,0,0x20}; // 0x82 is the total len on ip, 0x20 is ttl (time to live)

#define BUFFER_SIZE 750
static uint8_t buf[BUFFER_SIZE+1];
char reply[]={0xFF, 0x00, 0x00, 0x00, 0x00};

EtherShield es=EtherShield();

uint16_t plen, dat_p, a;

static uint32_t timetosend;

///----------------------------------------------------------
void setup(){
 
  es.ES_enc28j60Init(mymac);
  es.ES_init_ip_arp_udp_tcp(mymac,myip, 80);

} // 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(millis() - timetosend > 100) // every 10 seconds //
    {
    timetosend = millis();
    if ( check()  )
              {
                reply[1] = digitalRead(A5) ? 1 : 0;
                reply[2] = digitalRead(A4) ? 1 : 0;
                reply[3] = digitalRead(A3) ? 1 : 0;
                reply[4] = digitalRead(A2) ? 1 : 0;
                UDP_Send();
              }
    }
    
} // end loop


void UDP_Send( void ) {
  uint8_t i=0;
  uint16_t ck;
  // Setup the MAC addresses for ethernet header
  while(i<6){
    buf[ETH_DST_MAC +i]= udpmac[i];
    buf[ETH_SRC_MAC +i]= mymac[i];
    i++;
  }
  buf[ETH_TYPE_H_P] = ETHTYPE_IP_H_V;
  buf[ETH_TYPE_L_P] = ETHTYPE_IP_L_V;
  es.ES_fill_buf_p(&buf[IP_P],9,iphdr);

  // IP Header
  buf[IP_TOTLEN_L_P]=28+sizeof(reply);
  buf[IP_PROTO_P]=IP_PROTO_UDP_V;
  i=0;
  while(i<4){
    buf[IP_DST_P+i]=udpip[i];
    buf[IP_SRC_P+i]=myip[i];
    i++;
  }
  es.ES_fill_ip_hdr_checksum(buf);
  buf[UDP_DST_PORT_H_P]=DEST_PORT_H;
  buf[UDP_DST_PORT_L_P]=DEST_PORT_L;
  buf[UDP_SRC_PORT_H_P]=0x12;
  buf[UDP_SRC_PORT_L_P]=0x34; // lower 8 bit of src port
  buf[UDP_LEN_H_P]=0;
  buf[UDP_LEN_L_P]=8+sizeof(reply); // fixed len
  // zero the checksum
  buf[UDP_CHECKSUM_H_P]=0;
  buf[UDP_CHECKSUM_L_P]=0;
  // copy the data:
  i=0;
  // most fields are zero, here we zero everything and fill later
  uint8_t* b = (uint8_t*)&reply;
  while(i< sizeof( reply ) ){
    buf[UDP_DATA_P+i]=*b++;
    i++;
  }
  // Create correct checksum
  ck=es.ES_checksum(&buf[IP_SRC_P], 16 + sizeof( reply ),1);
  buf[UDP_CHECKSUM_H_P]=ck>>8;
  buf[UDP_CHECKSUM_L_P]=ck& 0xff;
  es.ES_enc28j60PacketSend(42 + sizeof( reply ), buf);
}


int check()
{
        if (digitalRead(A5) != reply[1] ) return(1);
        if (digitalRead(A4) != reply[2] ) return(1);
        if (digitalRead(A3) != reply[3] ) return(1);
        if (digitalRead(A2) != reply[4] ) return(1);
        return 0;

}

Slave (Relays) 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];

EtherShield es=EtherShield();

uint16_t plen, dat_p;

///----------------------------------------------------------
void setup(){
Serial.begin(9600);
Setup_Pins();
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){
Relay_Control();
buf[IP_PROTO_P]=0;
}

} // end loop

///----------------------------------------------------------
void Setup_Pins(){

pinMode(5, OUTPUT); digitalWrite(5, 0);
pinMode(6, OUTPUT); digitalWrite(6, 0);
pinMode(7, OUTPUT); digitalWrite(7, 0);
pinMode(8, OUTPUT); digitalWrite(8, 0);

} // end Setup_Pins

///----------------------------------------------------------
void Relay_Control(){
Serial.print(buf[43], HEX);
//if (buf[42]==0xFF)
// {
//Serial.print(buf[43], HEX);
digitalWrite(8, buf[43]);
digitalWrite(7, buf[44]);
digitalWrite(6, buf[45]);
digitalWrite(5, buf[46]);
// }
} // end Relay_Control

Vixen KMtronic Relays Control

Download and install Vixen Lightning from

http://www.vixenlights.com/

Download information and DLL:

http://www.info.kmtronic.com/Vixen_KMtronic_Relays_Control.zip