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by stevebird
Fri Jul 05, 2013 6:04 pm
Forum: Python
Topic: RPi.GPIO Wiegand capture speed?
Replies: 68
Views: 30052

Re: RPi.GPIO Wiegand capture speed?

Stevebird - I work for such a company and I can tell you we charge more than you were quoted :-). Exactly, I don't know why they are so much, the component parts are relatively inexpensive, install of the locks by a good chippy can be done reasonably quick. It shouldn't be expensive. How many reade...
by stevebird
Thu Jul 04, 2013 7:06 pm
Forum: Python
Topic: RPi.GPIO Wiegand capture speed?
Replies: 68
Views: 30052

Re: RPi.GPIO Wiegand capture speed?

HI, For me, I only do the time critical keypad reading with the atmel ic, I do appreciate what you say about not being able to update it and maintaining once piece of code though. I could have designed in a programmer for the pi to update the atmel but I've tested that code and it seems very very st...
by stevebird
Thu Jul 04, 2013 6:17 pm
Forum: Python
Topic: RPi.GPIO Wiegand capture speed?
Replies: 68
Views: 30052

Re: RPi.GPIO Wiegand capture speed?

http://www.avtsuk.com/cromer/doorman_schematic1_schem.jpg http://www.avtsuk.com/cromer/doorman_schematic1_schem.jpg I've abandoned trying to read the Wiegand keypad with the Pi, it just wasn't reliable, I've ended up using a £3 atmega IC to do the read, as well as a complete re-write of the audrino...
by stevebird
Wed Mar 06, 2013 8:04 am
Forum: Python
Topic: RPi.GPIO Wiegand capture speed?
Replies: 68
Views: 30052

Re: RPi.GPIO Wiegand capture speed?

I was coming round to that idea, would it be a cheaky ask to see your arduino code please? ;)
by stevebird
Tue Mar 05, 2013 4:17 pm
Forum: Python
Topic: RPi.GPIO Wiegand capture speed?
Replies: 68
Views: 30052

Re: RPi.GPIO Wiegand capture speed?

I think I've started to hit the same problems as the OP, when doing anything other than simply printing a 0 or 1 depending on the data detected, it seems the cycle time just isn't fast enough to be able to detect the data. Storing the detected data, counting the detected bits and outputting the resu...
by stevebird
Mon Mar 04, 2013 7:08 pm
Forum: Python
Topic: RPi.GPIO Wiegand capture speed?
Replies: 68
Views: 30052

Re: RPi.GPIO Wiegand capture speed?

This is my test Wiegand code, written in PHP and seems to produce some output, which most of the time seems to be correct. My Wiegand keypad has the buttons, 0-9 , ESC & ENT on it, its also an RFID reader but the tags where not in the box so I cant test those until they arrive, but I see no reason w...
by stevebird
Fri Mar 01, 2013 9:04 pm
Forum: Python
Topic: RPi.GPIO Wiegand capture speed?
Replies: 68
Views: 30052

Re: RPi.GPIO Wiegand capture speed?

I've ordered an RFID reader that outputs the wiegand protocol. But its not here yet, the plan will be to make it the front end to my door access project for woodsidebreaks. looking at the spec, D0 &D1 being the data outputs are at 5v when at rest, which is too high a voltage for the Pi. options are ...

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