Re: CM15A & receiving dim

[AZ Woody <reply@here>]

Neil..

Here's my spec on interfacing with the cm15a.  I've not updated it in a bit.

http://homeauto.usandthem.com/cm15a/cm15spec.txt

If that doesn't help, let me know and I'll send you my dim code offline.

-woody (woody at usandthem dot com)

Neil Cherry wrote:
> On Sat, 18 Nov 2006 11:53:55 GMT, Dave Houston wrote:
>> Neil Cherry <njc@xxxxxxxxxxx> wrote:
>>
>>> I'm not sure if anyone has resolved this but I'm trying to decode
>>> simple dim commands being sent from the ti103 and received by the
>>> CM15A. If I send 1 DIM ($>28001N01ND40ND40F8# or N1 NDIM - note these
>>> are continous dims for a single command) I see:
>>>
>>> 5a020086
>>> 5a03020b84
>>>
>>> As far as I can tell (no X10 doc still) the first line is 5A (received
>> >from the power line) 02 (2 bytes follow) 00 (it's an address) and 86
>>> (X10 address - N1). The second line is 5A (power line), 03 (3 bytes
>>> follow), 02 (either 2 more bytes of an ID for DIM/BRIGHT), 0B (Dim % -
>>> still need to figure out the math) and 84 (NDIM).
>>>
>>> I've also sent multiple dims:
>>>
>>> 1 DIM = 5a03020b84
>>> 2 DIM = 5a03020b84
>>> 3 DIM = 5a03021684
>>> 4 DIM = 5a03022184
>>> 5 DIM = 5a03022c84
>>>
>>> Not sure what the math is on these. I'm guessing value/256 * 100 but
>>> that's just a guess. Any ideas?
>> It depends on the receiver (and manufacturer) but I worked out the math for
>> an LM465 using a 100W lamp and my Kill A Watt meter. See...
>>
>>      http://davehouston.net/micro-dim.htm
>>
>> See the CM11A documentation for an explanation of the bytes from the CM15A.
>> The third byte (02 in all but your first example) is a bit map that
>> indicates which of the following bytes are addresses and which are
>> functions.
>
> Dang, you solve that one! This is good, so it goes:
>
> 5a - A 'What' (RF, Power Line, Macro, ACK, etc)
> 03 - Byte count
> 02 - ID (00 X10 Addr, 01 X10 Command, 02 X10 Dim/Bright, 08 Extended code?)
> 0b - reported intensity of Dim/Bright
> 84 - House Code/Function code
>
>> Note that the CM11A documentation says 22 DIMs equals 100% but the lamp
>> module never goes to 100%. The maximum is 96%. There's no measureable
>> difference between 21 & 22 contiguous steps using both the Kill A Watt and a
>> true RMS voltmeter.
>
> I saw the 210 in the CM11A documentation. With the TI103 22 continuous
> dims reports back 0xD2 intensity as does 24 dims.
>
>> Earlier versions of the CM11A firmware output after each dim/bright command
>> rather than sending the cumulative total. I haven't confirmed this but I
>> think there was no way to accurately estimate the actual level because you
>> couldn't tell whether the dim/brights were contiguous.
>
> I've not seen anything but cumulative with the CM15A. I don't really
> need accurate just a general 'what it means'. This is so Mr. House can
> use the CM15A.
>
> Dave thanks this goes a long way towards getting the CM15A up and
> running with Mr. House. Next up is translating:
>
> 5a0508313f0667
>
> The CM11A and Mr. House reports it as brighten A 1 to 100% (I think
> it's a preset bright command). I have to sit down and decode the
> middle 2 bytes. Here's what I've got so far:
>
> 5A - Power Lince
> 05 - 5 bytes
> 08 - Extended
> 31 - ASCII 1
> 3f -
> 06 -
> 67 - HC = A FC = Extended code
>
> I'll have to sit down with the xtc797 doc to see if I can decode
> this.
>
> Thanks!
>