Display Relay Status on NodeRed

[subas]

Dear Sir.

I managed to use the IFTTT on the KC868-COL logical controller. 
A very simple test where if the Temperature shows above 33degC Relay 1 turns on at the KC868-H32 relay board's. Both KC868-H32 relay board's and  KC868-COL logical controller are connected via a RS232 cable.

How do show the status of Relay 1 on the KC868-H32 relay board's using a LED on the NodeRed to indicate it's turned "ON"? i don't want to use a Digital in as its a waste of resource. Just a LED on NodeRED reading from the "Function" Node where when its "ON" Led lights up on the NodeRed Screen and when "OFF", LED turns off.

Regards
Subas