More "Universal" IR Remote Control

fell at the first hurdle - the resonator in the one-for-all is 3 pin , 2 element? 8MHz resonator

Perhaps make and model might be made available?

The default, not in vol or menu mode , for + is the keystone + function The code , in the manual , for that via the RS232 link is start code ascii 0 0 ,function r06 ,and end code (return) so HEX

30 30 72 30 36 0D I wonder if any of that is reflected in the IR code for +

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Not listed there , but that would have spoilt my fun. I've just captured that "+" code on a learning remote so I can play it at will , rather than counting 105 steps on the URC . Whatever the code was the URC sent is not stored in the URC as the same code. So I've "learned" the 2 , to see what the difference is also. Will have a look on a straight scope for the 2 basic timings and then DSO to read the 0s and 1s. I looked into the learner to see if its possible to change the resonator to a much lower frequency to actually observe/count/time the code by swapping IR LED to visible LED. But an 8 MHz 2 element 3 pin , I've previously done that when I had no DSO access.

Even going down the LIRC route you still have to crack into the IR receive hidden decoding to get started, if no listing. It would be nice to have a general "all codes" sniffer , I was just lucky with this attempt this time . Anyone know, if you had access to the uP of the device in question and could put a nanoamp monitor or something in a supply line, whether you could zero in , like cracking a combination lock

I thought I'd better try the learned code on the projector, but nothing. It is all now making a bit of sense though. With the projector I was not covering the IR LED with the other hand. With OFA 23 button push on its own , isolated, produced no OSD. It now explains why I could only preset with code 1004 and advance 23 steps as somewhere in between was a pre-code . By elimination , by selective covering of the LED , it is step 6. So programmed in 2 codes in the learner, "6" and "23". It now works with the projector bringing up the Keystone + on OSD. Codes are not sequential in the OFA , preset to 1004 and +6 pushes reads out as code number 631 and 1004 + 23 reads out as 1928

So I thought set with learned "6" and run through all the OFA codes. If there is a time-out reset between 6 and 23 it is greater than 2 minutes, as I timed it . In TV and SAT codes something resets the 6 , in less than 2 minutes so something active in the wrong sense , but did not ellicit any other OSD responses.

If the "23" preceeded the "6" in the OFA listing then I would not have seen the keystone response , although (not specifically stated in the manual) you can multi-step down as well as up. Will set up scope and DSO tomorrow. I will also try learned 631 code and OFA going down all its code banks to see if it hits something active before those lurking reset codes. Lools like a more general hack routine is to use 2 URC , preferably the same model, for these 2 stage coded systems and automate the button pushes electronically

I aalso powered-down the projector to reset any erroneous codes in the system and then checked from fresh , that the learned 6 and 23 worked still

One-For-All remotes- some have reassignment values for the different device keys. And, for instance, the TV subset will not accept codes or generate codes outside the TV code database. Check and reassign the device keys for the proper device. Usually by: device key set enter reassignment code (992) target device key

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The O-F-A is just a tool in this experiment, a means to an end

Looks as though the "23" precode of a Pioneer DVD is HEX FFF0289294AA8 and the "6" code of a Samsung DVD is FF01 Perhaps a lot of the "23" one is ignored as junk and only the AA8 or 4AA8, say , acts as precode.

So now to build a PISO with a bank of dip switches to code around the FF01 for the various functions (hopefully) and retain the learned code of the "23" and use both to set up a workaday learner rather than fancy one with LCD touch screen liability

Now where to find some of these basic Chunghop learning remotes

from a genuine co.uk rather than the co.hk or whatever, of that supplier. "If something is too good to be true, then probably not true" but then perhaps a non-CC gamble on 3 off of them is not so tough