Or boxes that respond to a query command with >only< an integer value of the result (Extron, Sharp, and Sanyo...I'm talking about you!).
Tx: "Input,2=?\r"
Rx: "4\r"
Stupid, stupid, stupid.
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On 4/20/2012 4:22 PM, Neil Dorin wrote:
I've got my brass knuckles and baseball bat. Just tell me where and when.
While we're at it can we beat on protocol engineers who's devices respond
with "OK\x0D" to a command to select input 96 to output 128? AAAARRRRGHHH
On Fri, Apr 20, 2012 at 2:10 PM, ChrisK<chris@...> wrote:
**
I vote that we hunt down the engineer(s) that created this kind of misery,
and make a stern example of him that there would be fear in the hearts of
all other protocol writers ...
Huzzah!! Who's with me???
Chris K..............;)
--- In Crestron@..., "erikm_101"<erikm101@...> wrote:
Wow! That is tremendously stupid. You would think you were sending gps
coordinates to a nuclear missile, not turning a light on and off.
I've seen some strange protocols/cksum calcs in my day, and this one
ranks up with the **best**.
--- In Crestron@..., "josephporter2020"<ttbtssav@> wrote:
Might not be this, but here's a device I recently came across that
used the same scheme.
--- In Crestron@..., "stainbow1"<stainbow1@> wrote:
what was the device?
Stephen D.
--- In Crestron@..., "Chip"<cfm@> wrote:
That would be an intriguing challenge... :)
I only need five short commands - I calculated the checksums by
hand...
- Chip
--- In Crestron@..., Geoffrey Reynolds<greynlds@>
wrote:
LOL - no SIMPL+ allowed for this :).
On Thu, Apr 19, 2012 at 1:30 PM, 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
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