I can't get the fingerprint sensor to work. I can compile the sketch to read a fingerprint. The sensor blinks on then off. The program says it can't find the sensor. please help, I need this for a school project.
Thanks
fingerprint sensor doesn't work
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Please be positive and constructive with your questions and comments.
- BeerCannon
- Posts: 85
- Joined: Fri Nov 16, 2012 9:16 pm
Re: fingerprint sensor doesn't work
lina,
It's going to be hard for anyone to help unless you post your code and describe or attach pics of how you have things connected in your circuit. Maybe have a peek at these guidelines http://forums.adafruit.com/viewtopic.php?f=25&t=12170 too.
It's going to be hard for anyone to help unless you post your code and describe or attach pics of how you have things connected in your circuit. Maybe have a peek at these guidelines http://forums.adafruit.com/viewtopic.php?f=25&t=12170 too.
- lina
- Posts: 21
- Joined: Fri Mar 01, 2013 12:51 pm
Re: fingerprint sensor doesn't work
I set it up just like your video said to using pins 2,3 and gnd and 5volts. Used the software provided. It is acting like there is something wrong with the sensor
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: fingerprint sensor doesn't work
Did you solder pins or some solid-core wire to the ends of the sensor wires? The sensor wires themselves are too thin to make a reliable connection.
- lina
- Posts: 21
- Joined: Fri Mar 01, 2013 12:51 pm
Re: fingerprint sensor doesn't work
Yes I soldered the wires to solid core wire
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: fingerprint sensor doesn't work
Have you tried the SFG Demo software? http://www.adafruit.com/datasheets/SFGDemoV2.0.rarIt is acting like there is something wrong with the sensor
If it is giving you error messages, tell us what those messages are.
- lina
- Posts: 21
- Joined: Fri Mar 01, 2013 12:51 pm
Re: fingerprint sensor doesn't work
The windows based software works erratically. After many tries it finally recognizes the hardware sometimes.
When I try to use the arduino software it says the fingerprint scanner cannot be found. The software compiles ok and the serial monitor asks for a fingerprint, then states the message that it can't find the sensor. I am getting very frustrated with this and wish I had not bought it.
Lina
When I try to use the arduino software it says the fingerprint scanner cannot be found. The software compiles ok and the serial monitor asks for a fingerprint, then states the message that it can't find the sensor. I am getting very frustrated with this and wish I had not bought it.
Lina
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: fingerprint sensor doesn't work
When it recognizes the device, what information does it display about the device. Post a screen shot if possible.After many tries it finally recognizes the hardware sometimes.
- lina
- Posts: 21
- Joined: Fri Mar 01, 2013 12:51 pm
Re: fingerprint sensor doesn't work
Your system will not let me attach a document and I don't have a public place to store my images. so how am I suppose to post my screen shots?
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: fingerprint sensor doesn't work
It will accept JPGs and PNGs. If they are large, try re-sizing to about 800x600.
- lina
- Posts: 21
- Joined: Fri Mar 01, 2013 12:51 pm
Re: fingerprint sensor doesn't work
Since I can not post my screenshot all that I can tell you is what I see. When I compile the sketch it says--
Fingerprint
Did not find fingerprint sensor : {
Fingerprint
Did not find fingerprint sensor : {
- lina
- Posts: 21
- Joined: Fri Mar 01, 2013 12:51 pm
Re: fingerprint sensor doesn't work
screenshots
- Attachments
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- last screen shot
- last screen shot.jpg (146.48 KiB) Viewed 1448 times
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- second screen shot
- second screen shot.png (282.51 KiB) Viewed 1448 times
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- first screen shot
- first screen shot.png (653.01 KiB) Viewed 1448 times
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: fingerprint sensor doesn't work
OK. We've been testing with a few of these sensors here in our lab and have a couple of suggestions:
For SFGDemo communication: The sensor (or SFGDemo) seems to get confused after a few connection attempts. It usually helps to power-cycle the sensor between connection attempts.
Also, be sure to run the blank sketch when using SFGDemo. Any Arduino serial communication will interfere with SFGDemo.
For Arduino communication: When running the example sketches, you have to connect to different pins. The example sketches are expecting the connections on Arduino pins 2 and 3.
For SFGDemo communication: The sensor (or SFGDemo) seems to get confused after a few connection attempts. It usually helps to power-cycle the sensor between connection attempts.
Also, be sure to run the blank sketch when using SFGDemo. Any Arduino serial communication will interfere with SFGDemo.
For Arduino communication: When running the example sketches, you have to connect to different pins. The example sketches are expecting the connections on Arduino pins 2 and 3.
- lina
- Posts: 21
- Joined: Fri Mar 01, 2013 12:51 pm
Re: fingerprint sensor doesn't work
I had already uploaded blank file when using the windows based software
I had already changed the pins to 2,3 when using the arduino sketch
The screen shots I sent to you had already reflected the above.
I had already changed the pins to 2,3 when using the arduino sketch
The screen shots I sent to you had already reflected the above.
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: fingerprint sensor doesn't work
OK. From your screen shots, SFGDemo reports that the device is communicating at 9600 baud. The default rate for the "enroll" sketch is 57600.
Change that to match the SFGDemo detected baud rate.
Code: Select all
// set the data rate for the sensor serial port
finger.begin(57600);
Please be positive and constructive with your questions and comments.