nfc-controlled-relay HostChoice.net

HostChoice.net: nfc-controlled-relay
Posted in: HowTo | by HostChoice.net | 2016 Nov 05

Hello all,
I am currently working on a project that uses relays, a little different than the one found in your article here.

http://waihung.net/bluetooth-controlled-relay/

I've attached a picture below of both the relay module and the bluetooth (JY-MCU HC 05). I am using the Arduino Uno as of now and the IN1 and IN2 from the relay module are in pins 6 and 7 respectfully. I modified the code that was provided in order to control 2 relays instead of one. I've attached the code also.

As of now, I can get the IN1 connected relay to turn on and off but not the 2nd relay, I am wondering what I am missing in my code that would make this work.

Additionally, I had to split the wires leading from both the relay module and the bluetooth module in order to connect both to the 5V pin on the Arduino. Is there a better way to do this? because both need a source of power.

Thanks!
Code: [Select]

// code 404303543

/*
PN532 reads the tag by Arduino mega/Leonardo

command list:

#wake up reader
send: 55 55 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 03 fd d4 14 01 17 00
return: 00 00 FF 00 FF 00 00 00 FF 02 FE D5 15 16 00

#get firmware
send: 00 00 FF 02 FE D4 02 2A 00
return: 00 00 FF 00 FF 00 00 00 FF 06 FA D5 03 32 01 06 07 E8 00

#read the tag
send: 00 00 FF 04 FC D4 4A 01 00 E1 00
return: 00 00 FF 00 FF 00 00 00 FF 0C F4 D5 4B 01 01 00 04 08 04 XX XX XX XX 5A 00

XX is tag.
*/

const unsigned char wake[24]={0x55,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0x03,0xfd,0xd4,0x14,0x01,0x17,0x00};//wake up NFC module

const unsigned char firmware[9]={0x00,0x00,0xFF,0x02,0xFE,0xD4,0x02,0x2A,0x00};//

const unsigned char tag[11]={0x00,0x00,0xFF,0x04,0xFC,0xD4,0x4A,0x01,0x00,0xE1,0x00};//detecting tag command

unsigned char receive_ACK[25]; //Command receiving buffer

int inByte = 0; //incoming serial byte buffer

#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#define print1Byte(args) Serial1.write(args)

#define print1lnByte(args) Serial1.write(args),Serial1.println()

#else
#include "WProgram.h"
#define print1Byte(args) Serial1.print(args,BYTE)

#define print1lnByte(args) Serial1.println(args,BYTE)

#endif

void setup()
{
  Serial.begin(9600); // open serial Baund rate 9600 bps
  Serial1.begin(115200);
  //Serial2.begin(115200);

wake_card();
  delay(100);
  array_ACK(15);
  delay(100);
  dsplay(15);
}

void loop()
{
   if (Serial.available() > 0)
   {
    // get incoming byte:
    inByte = Serial.read();
    if (inByte=='r')
    { 
      read_tag();
      delay(100);
      array_ACK(25);
      delay(100);
      dsplay(25);
    }
    else if (inByte=='v')
    {
       firmware_version();
       delay(100);
       array_ACK(19);
       delay(100);
       dsplay(19);
    }    
   }
}

void UART1_Send_Byte(unsigned char command_data)
{
  //Serial1.print(command_data);
  print1Byte(command_data);// command send to device
  #if defined(ARDUINO) && ARDUINO >= 100
    Serial1.flush();// complete the transmission of outgoing serial data
    #endif
}

void UART_Send_Byte(unsigned char command_data)//, unsigned charBYTE
{
  Serial.print(command_data,HEX);
  Serial.print(" ");
}

void array_ACK(unsigned char temp)
{
    for(unsigned char i=0;i<temp;i++)
    {
       receive_ACK= Serial1.read();
       delay(100);
    }
}

void wake_card(void)
{
    unsigned char i;
    for(i=0;i<24;i++) //send command
   UART1_Send_Byte(wake);
}

void firmware_version(void)
{
    unsigned char i;
    for(i=0;i<9;i++) //send command
    UART1_Send_Byte(firmware);
}

void read_tag(void)
{
    unsigned char i;
    for(i=0;i<11;i++) //send command
    UART1_Send_Byte(tag);
}

void dsplay(unsigned char tem)
{
    unsigned char i;
    for(i=0;i<tem;i++) //send command
    UART_Send_Byte(receive_ACK);
    Serial.println();
}

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