Modbus help

[nisan]

I need your help to create a Modbus integration for an air conditioner. Register 11 is used to select the indoor unit, and registers 12-16 correspond to the functions of the selected indoor unit. For example, if you enter 3 in register 11, then registers 12-16 represent the functions of indoor unit 3. Can this be written as a JSON file for the gateway to control each indoor AC unit? Currently we use event scripts and resident scripts for control, but control packets are often lost, requiring a second operation. Looking forward to your reply, thanks!