key=""

cmd01=[0x01,0x03,0x00,0x00,0x00,0x01,0x84,0x0A] 
cmd02=[0x01,0x03,0x00,0x01,0x00,0x01,0xD5,0xCA] 
cmd03=[0x01,0x03,0x00,0x00,0x00,0x01,0x84,0x0A] 
cmd04=[0x01,0x03,0x00,0x01,0x00,0x01,0xD5,0xCA] 

num=0

TIMER HeartBeat 500
   num=num+1
   IF(num==1)
   SEND(UART,uart0,cmd01)
   key="CH1"
   END
   IF(num==2)
   SEND(UART,uart0,cmd02)
   key="CH2"
   END
   IF(num==3)
   SEND(UART,uart0,cmd03)
   key="CH3"
   END
   IF(num==4)
   SEND(UART,uart0,cmd04)
   key="CH4"
   num=0
   END
END

RECV UART uart0
 DATA=INPUT
 DATA_S=DATA.hexString()
 DATA_B="{"key":""+key+"","value":""+DATA_S+""}"
 SEND(SOCK,netp,DATA_B)
END