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monkeyboard / Wiegand-Protocol-Library-for-Arduino

Wiegand 26 and Wiegand 34 Protocol Library for Arduino
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Cant seem to get the card read #26

Closed akeilox closed 6 years ago

akeilox commented 6 years ago

I have a generic EM Wiegand 26/34 bit reader. The cable pin outs are standard, 12v, Gnd, D0, D1, purple (when connected to gnd turns it to 34 bit) and buzzer, as shown in picture https://imgur.com/a/BvFgg

I have setup the sketch and uploaded to Arduino Uno, code runs and awaits wg.available() I have the 12v and GND connected to 12v +/-, and only D0,D1 connected to Arduino uno io pins 2 and 3 (i have not connected GND to arduino gnd pin, as its already connected to 12v -)

when i tap an EM card, the reader beeps as card detected, but there is no output on the serial monitor. I can see the reader not responding to non EM cards (like Mifare) and always beeps when EM card tapped.

I cant seem to find why the example sketch wq.available() doesnt work in this case. The reader is generic, arduino uno works, D0 (green) and D1 (white) connected to pins correctly, 2 and 3.

I am not sure what could be the issue. Is there any pointers that You can share or alternative troubleshooting advise?

jpliew commented 6 years ago

Hi @akeilox could you try connect the ground from the reader to Arduino please?

If still not working, please try https://github.com/jpliew/Wiegand-NG-Multi-Bit-Wiegand-Library-for-Arduino and post your result in binary here.

akeilox commented 6 years ago

Hi @jpliew Thank you for your patience. When I put another wire from 12V - (gnd) to arduino Gnd , it worked!

Does it mean the GND connection is a must for all wiegand readers? Like even i use esp8266 etc

jpliew commented 6 years ago

@akeilox glad to know it is working now.

If you look at the schematic of this library on README.md wiegand schematic

You can see that the GND for the two (wiegand reader and Arduino) are connected. This is a basic requirement for connecting two electronic devices.

akeilox commented 6 years ago

Thanks @jpliew I'm new to Wiegand readers, and had a wrong understanding/assumption of D0 and D1 lines. GND connection is a must, whether its Arduino or ESP board, that I understand.

Thank you for taking time clarify, appreciated!