Serial interface problems

I am programming a crestron processor to control a Clipsal C bus lighting system.
I have read and understood the serial interface user guide. The serial command in the examples of the guide is in the form:
\x0538000108BA

I know 05=header
38=lighting application address
00=default
01=off command
08= group number
BA=checksum

Can anyone please tell me how to assign the group number?

 

Can you please tell me the procedure? you are not talking about the groups we select from the drop down menus in the unit programming right?

 

I have used the command

\x0538007908\r

where

05=header
38=lighting application address
00=default
79=on command
08= group number

This command is being used to light up the group of channel one on an eight channel relay. I have used the address 008 when assigning the group in the C bus toolkit programming. I am using a crestron processor to send the command yet the channel doesn?t turn on. Is there a mistake in the command I am sending?

Plus I have not assigned the checksum in the command. What is the default value of the SRCHK option? Is it turned on or off?

I am using only one relay right now but what if I decide to use more than one? How should the addressing be done then?

 

You should send the following:
\0538007908r

That will send an On command to Group Address 08.

Fresh out of the box, the Checksum parameter is turned off in a PCI. If the checksum option is turned on, then every message sent to the PCI will require you to calculate the checksum and append it to the message, just before the "r" character.

If the command is successful, you will receive an "r." back from the PCI.

If you wanted to turn on 3 relays, for example, and their Toolkit Groups were 008, 009 and 010, then you would send the following command:
\05380079087909790Ar

This is called a concatenated command, where you send multiple commands within a single message. The reason that it is 0A and not 10 for the 3rd command is that Toolkit, by default, uses decimal addressing, whereas the C-Bus devices use hexadecimal addressing.

 

I wrote the code as you instructed but now when I complie I got the notice:

NOTICE (RLCMCVT106)
Invalid Escape Sequence "\0" detected in S-1, Prompt "str1".

However I uploaded the program to my processor anyway but when I tested it the group number 8 did NOT light up.

I cannot figure out the problem.

 

If you are sending the string to the interface through a computer program you need to include a carriage return <cr> on the end of the strings for the PC Interface to be notified that the incoming message is complete, and can now be processed.

I suggest you open a hyperterminal session to your interface and try sending the string "\0538007908r" to it, followed by a carriage return. If it works, then you know that the problem is in your program/code.

If it doesn't work then send the string "~~~" followed by "\0538007908r<cr></cr><carriage return="">" followed by a carriage return. This will reset the interface to basic mode prior to processing the command. If this works, then the problem is that you're not initialising the interface correctly in your program.</carriage></cr>

 

Yes I am sending the commands through a computer program but how do I include a carriage return?

 

No-one can answer that for you as it entirely depends on what software you are using [Crestron] ?

 

We aren't really the right people to ask, as we are not necessarily familiar with Crestron.

It looks like the Crestron compiler doesn't like the \0 in the string. In C and some other languages, the \ has a special meaning in a string. In those languages, if you want a backslash in the string, you put in two of them, so your string would be \\0...

Give that a try.

 

Yes I am using crestron