Connect multiple Modbus RTU devices to a single RS485 port, with KCS v3 acting as the master to poll and read each device.
The example includes a temperature sensor, a humidity sensor, and an energy meter, with Modbus addresses 1, 2, and 3, respectively. The diagram shows the A/B bus, termination resistors at both ends, and requirements such as unique device addresses and matching serial communication settings.

• Controller TXD → G1 RXD
  
• Controller RXD ← G1 TXD
  
• GND → Common ground
  
• G1 requires an external power supply, a SIM card, and a 4G antenna.
  

• D0 → GPIO A
  
• D1 → GPIO B
  
• GND → GND
  

• 12 V LED driver → 12 V LED strip
  
• 24 V LED driver → 24 V LED strip
  
• AC dimmer with a 0–10 V input → Dimmable AC 220 V lamp
  

• 0–5 V / 0–10 V: Connect the sensor OUT to AI1. Connect the sensor and controller to a common GND.
  
• 2-wire 4–20 mA: Power supply positive → Transmitter +; Transmitter − → AI1; Controller GND → Power supply negative.
  

• DI1 connected to GND: TRUE
  
• DI1 disconnected from GND: FALSE
  

• COM connected to GND: The switch connects +12/24 V to DI1.
  
• COM connected to +12/24 V: The switch connects GND to DI1.
  

• L (Live) → Fuse → COM
  
• NO → Lamp → N (Neutral)
  
• NC: Leave unconnected
  

I have A8v3 and H32B.
I want to make a condition by kcs v3 like this :

If the relays 2,4,6,……..,32 in H32B are on, then turn on relay2 in A8v3.

I made a custom protocol 3 like this:

Realy-status-255,170,170,170,170

The router is: TCP Client.

In the IFTTT Condition, i put this:

If “custom protol 3”, Then DO2 ON.

But it didn’t work!!

Is there something i need to correct?