Falmec encoding

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shira66@gmx.at
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Posts: 3
Joined: 24 Sep 2020, 15:15

Falmec encoding

#1 Post by shira66@gmx.at » 08 Oct 2020, 12:45

I am still trying to get the falmec (hood) to work.
so far i found out:
- rflink detects 1 remote as falmec but another remote Not
Detected:
20;32;DEBUG;Pulses=34;
Pulses(uSec)=240,210,510,510,210,510,210,510,210,510,210,510,210,510,210,510,210,510,210,510,210,510,210,510,210,510,210,210,510,510,210,510,210,6990;
20;33;FALMEC;ID=7900;SWITCH=01;CMD=OFF;

Not detected:
20;35;DEBUG;Pulses=34;
Pulses(uSec)=330,240,600,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,240,600,600,240,600,240,6990;
20;36;DEBUG;Pulses=34;
Pulses(uSec)=330,240,600,600,240,600,270,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,240,600,600,240,600,240,6990;
20;37;DEBUG;Pulses=34;
Pulses(uSec)=330,270,600,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,600,240,240,600,600,240,600,240,6990;

- when analzing the timings (on the pi) it looks like manchester but the two remotes have different clocks
450 us vs 500 us

remote 1
last=396 ratio=333 ratio2=325 nt=35 13203 406 200 696 511 397 509 404 500 405 502 404 507 402 502 420 487 392 520 391 511 395 509 391 516 390 516 393 220 696 515 382 517 397 13209
av=451

remote 2
last=491 ratio=307 ratio2=294 nt=35 15118 514 183 841 549 462 573 542 500 480 562 457 581 461 582 517 531 453 583 499 539 443 592 469 572 483 565 480 209 811 578 455
586 451 15157
av=518

- using the "10;FALMEC;7900;ON;" command on the rflink has NO effect on the hood
- generating the same pulse sequence as sampled has NO effect on the hood but is detected as FALMEC on the rflink (sender and RFLINK are separate hardware)
Tried both clocks (450 and 500)


- when analyzing the sample i found that some of the pulse duration are way off (also note that the sampling on the pi has an error margin)

My question now:
- is the falec protocol based on manchester ?
- is the sync time crucial for the en/decoding
- what do i miss ???

Thank for your comments in advance

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