| Products > Test Equipment |
| Brymen IR connection protocol - Anyone sniffed it yet? |
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| imk:
Hello, Anyone have link to Brymen protocol please as all link in this thread seem to be dead. Many thanks imk |
| TWMIV:
If you still need it, Brymen rearranged their website. The protocols for the various models are now here: http://brymen.com/product-html/Download2.html |
| e1e0:
Just in case somebody is still interested on this ... or wants to build a cable, here is my experience with it. First, thanks to jadew and Simon Loell for the good work decoding the protocol. Also to jesuscf, I shamelessly took his "#defines" of the protocol definition for my own build. My idea was building the cable with things I already got at home and get a decent result. I had some ATTiny85 from another project, that plus the LEDs (I also had from some IR tests long time ago), plus 3 resistors and a BJT, all in a tiny small perfboard makes a fantastic cable. I use then one of those cheap USB to serial adapters to communicate with the micro. See attached schematic. The RX part of the software serial is not even connected, I did not bother in the end. I'm a bit ashamed of the code, but if somebody needs it, I can send it no problem. Perhaps the only real difference with what other folks have done, is that I designed a 3D printed enclosure that attaches to the meter, kind of a clone of the original, but a lot simpler. I based the design on pictures and my own measurements as I don't own the original cable. The STL file is attached. I hope somebody finds it useful. Cheers, e1e0 |
| jdev99:
Good job e1e0 (and all others who made this possible) :-+ I also am looking at building this interface for myself. I like your 3D printed attachment, will do the same. Thank you. ;) |
| hals:
Here's a simple 'C' implementation of Brymen BM857 optical interface decoding. Optical output to a photodiode/transistor can then be connected directly to a standard UART set to 7812 baud (128us bit time). No need for a microcontroller. https://github.com/halsampson/Brymen857 |
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