Fun! No, I'm neither polling nor planning on even interlocking the feedback on the touch panel light controls, as I gathered as much from the protocol docs! :)
- Chip
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--- In Crestron@..., "josephporter2020" <ttbtssav@...> wrote:
:D
I'll try to save some headache for you. If you are polling for feedback, you'll find that when you recall a preset, the actual lighting panel buttons will show feedback properly, but if the user recalls a preset from the lighting panel, the rs-232 interface does not reflect that change.
--- In Crestron@..., "Chip" <cfm@> wrote:
Yes - good call!!
- Chip
--- In Crestron@..., "josephporter2020" <ttbtssav@> wrote:
I feel like I've faced this recently. Is this a lighting interface? I did the calcs by hand too.
--- In Crestron@..., "Chip" <cfm@> wrote:
Okay, so requiring a checksum on a 232 string is redonkulous (these days) to begin with - but check THIS one out:
<paraphrased>
"Two-byte checksum. Calculate an XOR of every ODD byte in the message (b1 XOR b3 XOR b5, etc) and invert the result - this is your first checksum byte. Now calculate an XOR of every EVEN byte in the message (b2 XOR b4 XOR b6, etc) and invert the result to obtain the second checksum byte"
Really? Really?!?!
- Chip
