Hello all,
I am working on a little project of my own, the DOOR project :)
I have ordered the adafruit optical fingerprint scanner and I noticed the voltage difference. So i bought a level switcher as well.
But i do have a 2 amp 12v adapter which I am going to use with a 78S05. And now my question could the scanner be hurt because of the high amps?
Gr
Fingerprint scanner on my raspberry pi
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Please be positive and constructive with your questions and comments.
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Fingerprint scanner on my raspberry pi
The scanner will only draw as many amps as it needs.
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- Posts: 7
- Joined: Thu Jul 10, 2014 4:25 am
Re: Fingerprint scanner on my raspberry pi
Ah oke thanks and is it needed to use a level swifter between the raspberry and the scanner because I don't get a signal back from it.
I use the fourchannel bidirectional level swifter from you guys between the two.
i connected the green wire to the tx of the raspberry and the white one to the rx, the power wires are connected to a external 5v power source and the level swifter is connected to the raspberries 3.3v power and the hv side to the external power suply. The scanner does work because the arduino can read from it.
I use the fourchannel bidirectional level swifter from you guys between the two.
i connected the green wire to the tx of the raspberry and the white one to the rx, the power wires are connected to a external 5v power source and the level swifter is connected to the raspberries 3.3v power and the hv side to the external power suply. The scanner does work because the arduino can read from it.
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Fingerprint scanner on my raspberry pi
I think you need to swap the green and white wires. Green should go to Pi RX and white to Pi TX
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- Posts: 7
- Joined: Thu Jul 10, 2014 4:25 am
Re: Fingerprint scanner on my raspberry pi
Ah oke thanks I will give it a try when i get home
- bkoffler
- Posts: 35
- Joined: Fri Dec 26, 2014 10:30 am
Re: Fingerprint scanner on my raspberry pi
I would like to join this discussion. I am working on a similar project where i am going to use the fingerprint scanner as a piece of an access control system. For arguments sake, let's assume that i have purchased three of these scanners and hooked them up to their own Pis.
Is there a way to essentially enroll all users on one of the devices and then update the others so that they will be able to recognize the same finger as if it were enrolled directly on it?
Having to enroll through the windows software is not ideal - but if one enrollment can handle multiple devices in remote areas that would be workable..
Is there a way to essentially enroll all users on one of the devices and then update the others so that they will be able to recognize the same finger as if it were enrolled directly on it?
Having to enroll through the windows software is not ideal - but if one enrollment can handle multiple devices in remote areas that would be workable..
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- Posts: 7
- Joined: Thu Jul 10, 2014 4:25 am
Re: Fingerprint scanner on my raspberry pi
Well there is a way to get the image (hash) and save it inside them but for all i know only the windows app support downloading the image without any good documentation
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Fingerprint scanner on my raspberry pi
Theoretically, I think you can do it. It involves downloading the templates from the enrolling scanner, and then uploading them to the other scanners. I've never done it, so I don't know if it actually works.
- bkoffler
- Posts: 35
- Joined: Fri Dec 26, 2014 10:30 am
Re: Fingerprint scanner on my raspberry pi
How would you suggest i begin thinking about that? How does one download or upload the templates? I will happily try this out..just need a push in the right direction!
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: Fingerprint scanner on my raspberry pi
Have a look at the Arduino library - it has a function for downloading the templates. The function for uploading will be similar. You'll have to review the user manual for the fingerprint sensor for details
https://learn.adafruit.com/adafruit-opt ... /downloads
https://learn.adafruit.com/adafruit-opt ... /downloads
- duste83
- Posts: 34
- Joined: Thu Jan 08, 2015 2:33 pm
Re: Fingerprint scanner on my raspberry pi
I am working on writing the library in python for the fingerprint sensor on the raspberry pi. It is a slow process. How far have you made it?
- duste83
- Posts: 34
- Joined: Thu Jan 08, 2015 2:33 pm
Re: Fingerprint scanner on my raspberry pi
viewtopic.php?f=50&t=49563
Here is a link to the python programming to communicate with the fingerprint sensor on this forum.
Here is a link to the python programming to communicate with the fingerprint sensor on this forum.
- duste83
- Posts: 34
- Joined: Thu Jan 08, 2015 2:33 pm
Re: Fingerprint scanner on my raspberry pi
https://github.com/duste/FingerprintSca ... erryPi.git
Here is the GitHub link
Here is the GitHub link
Please be positive and constructive with your questions and comments.