EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: SadE54 on April 28, 2016, 07:01:59 pm
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Hi,
I'm developping an homemade home alarm system using rfm69 modules .I bought an Etiger RFID keypad to modify it (it's better looking than all I could make :)
After some hours of reverse engineering I have almost what I need to connect my homemade mcu ( the one soldered is an specific chinese one, no avr here !).
(http://img11.hostingpics.net/pics/287389IMG20160428074116.jpg)
(http://img11.hostingpics.net/pics/996687IMG20160428074135.jpg)
The last thing is to be able to decode the RFID data. The tag is a 125khz one. I used a teensy 3.1 to timestamp all the data stream and converte dit to a sigrok file.
(http://img11.hostingpics.net/pics/500941rfidtag125.jpg)
The Sigrok file can be dowloaded here :
http://s000.tinyupload.com/?file_id=98525172856803099296 (http://s000.tinyupload.com/?file_id=98525172856803099296)
I thought it was EM4100 but it seems it's not the case even if we can observe repetitive data.
In the last part of the file (not on the picture) there's a sequence there's not seem to be modulated even if we can observe pulses with other width
I don't know the modulation scheme I have to use to decode the data :-/
If there's RFID specialists here , you're welcome ! ;)...