Message format

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Communication between PC or Home Automation Controller and CoolMaster via RS232 interface is based on text messages. Communication example is shown below

 

>stat 101

command

PC to CoolMaster

101 ON  27C 00,00C Auto Dry  OK

response

CoolMaster to PC

OK

exit code

>

prompt

 

Command message sent to CoolMaster must be terminated by CR (carriage return 0x0D) LF (line feed 0x0A) sequence or a single CR character. Messages from CoolMaster (except prompt character) are terminated by CR LF. Commands are case sensitive and should not contain leading or trailing spaces. The only separator between command name and command parameter(s) is space character.

 

In case of wrong command CoolMaster response can be one of the following strings:

 

Unknown command  

Unrecognized command name

Bad parameters   

Command has missing or wrong parameters

 

If command was executed CoolMaster will return optional response and exit code. Detailed information is provided in topics describing specific commands.