fingerprint sensor not working
Moderators: adafruit_support_bill, adafruit

fingerprint sensor not working

by JimK123 on Thu Feb 14, 2013 8:07 pm

I just bought the finderprint sensor #751 and was trying to follow the tutorial. I first tried the 'blank' sketch (grn=d1,wht=d0), downloaded and ran the windows program sfgdemo.exe. It connected ok on the COM port where the arduino is but when I click on capture nothing happens. I tried changing the baud rate to match the enroll sketch (57600) but still nothing. The one thing I noticed is in the video it shows the scanner with a red light but mine the red light only comes on briefly when I first apply power (5v). I did solder the jst wires to a header and tested them with a continuity check so I feel the wiring is ok.

Then I tried the enroll sketch (running 1.0.3) after changing the wiring to uses pins 2=grn ,3=wht, opened the serial monitor and it said "Found fingerprint sensor!" but when I type in a number to enroll and click send, and place my finger over the sensor nothing happens. (again no red light on the sensor like the video shows)

Attached is pic of the wiring. Thoughts ?
Attachments
photo.JPG
photo.JPG (39.27 KiB) Viewed 436 times
JimK123
 
Posts: 33
Joined: Sun Dec 26, 2010 7:04 pm

Re: fingerprint sensor not working

by JimK123 on Thu Feb 14, 2013 8:37 pm

sorry meant to say on the SFGdemo.exe when I connected to the com8 port it said 'open device success' and when I checked preview and clicked enroll it says place your finger on the sensor but nothing happens (no red light comes on)
JimK123
 
Posts: 33
Joined: Sun Dec 26, 2010 7:04 pm

Re: fingerprint sensor not working

by adafruit_support_bill on Fri Feb 15, 2013 7:21 am

Your connections look good. When you connect with SFGDemo, does it display the hardware information in the window on the lower left?
User avatar
adafruit_support_bill
 
Posts: 31727
Joined: Sat Feb 07, 2009 10:11 am

Re: fingerprint sensor not working

by JimK123 on Fri Feb 15, 2013 7:55 am

I ran the .exe again and it does not, even though it says connected. Looking back at your tutorial I noticed it does display some info on the device in the left hand section.
JimK123
 
Posts: 33
Joined: Sun Dec 26, 2010 7:04 pm

Re: fingerprint sensor not working

by adafruit_support_bill on Fri Feb 15, 2013 8:18 am

OK then. Contact support@adafruit.com with a link to this thread and we can send you a replacement.
User avatar
adafruit_support_bill
 
Posts: 31727
Joined: Sat Feb 07, 2009 10:11 am

Re: fingerprint sensor not working

by JimK123 on Wed Feb 20, 2013 5:59 pm

update: using the sfgdemo.exe I found that by changing the baudrate=57600, size=128 and level=3 it connected and displayed the hardware info in the left pane and I was then able to enroll finger prints. The tutorial suggested leaving these fields empty initially but I could only get it to work by entering values in those 3 fields. I noticed in the hardware window the product type, sensor name and version were different than the tutorial so maybe somthing changed in latter versions of the hardware. Anyway seems to be working fine now. Thanks Adafruit !
JimK123
 
Posts: 33
Joined: Sun Dec 26, 2010 7:04 pm