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As a person without a car, I don't need to carry keys around everywhere I go. Because of this, I've been locked out of my own house several times. It's a pain to wait for someone with a key, so I thought I would do something about it.

This project is my way of solving this problem, while getting the chance to interface with an awesome fingerprint scanner (aka: FPS).

Also, this module isn't restricted to just garage doors, for you can create different kinds of simple motorized locks to suit your needs.

Step 1: Materials

Electronics:

Part Supplier (pictures are clickable!)
Fingerprint scanner (and JST connector) Sparkfun Sparkfun
Serial LCD kit (w/ATmega328)Sparkfun
ATtiny85Sparkfun
NPN transistor Sparkfun Radioshack
BuzzerSparkfun Radioshack
Speaker wireRadioshack
3D printed caseSee step 9 for files
Copper tapeSparkfunAmazon
5V voltage regulatorSparkfunRadioshack
9V batterySparkfunRadioshack
9V battery connector SparkfunRadioshack
SPDT limit switch
SparkfunRadioshack

Here is a list of almost all of the parts (It's a Sparkfun wishlist).

Tools:

  • Soldering iron/solder
  • Electrical tape
  • Hook up wire/ jumpers
  • Wire cutter/stripper
  • Perfboard
  • Assorted resistors
  • Screws
  • Drill
  • A few LEDs for testing
  • 5V FTDI board (Sparkfun)
  • Hot glue gun
  • Access to a 3D printer
  • Optional: IC holder (8 pin for ATtiny and 28 pin for ATmega)
  • Optional: Another Arduino board/10uF capacitor (see step 5 for details)
<p>Hi nodcah I've a problem with the Gt511-C3 can you give your email adress to ask you one thing?</p>
<p>Please see the <a>product page</a> for more information about the fps. If you are still having trouble, please post a comment publicly so everyone can benefit from your question!</p>
<p>can anyone send me pdf file? i cant see</p>
Which part do you need a odd of? The entire instructable?
<p>*Which part do you need a PDF of?</p>
<p>Hello</p><p>I can not get the FPS is possible to use another sensor? For example https://www.adafruit.com/products/751</p><p>Which library should I use?</p>
<p><a href="https://github.com/adafruit/Adafruit-Fingerprint-Sensor-Library">https://github.com/adafruit/Adafruit-Fingerprint-S...</a></p><p>It will require quite a few code changes from the code I wrote in step 8, but it's possible! Please share if you end up getting it working!!! =D</p>
<p>I solder a USB cable at the back of the scanner and when I used the demo software I successfully managed to enrol two prints. However, when I used the FPS_Enrol example file, I am not getting any thing at the serial monitor ? Any feedback will be much appreciated. </p>
<p>Can you send a picture of your setup please? It should be the same as mine in the picture attached, but using an Uno instead of the serial LCD.</p>
<p>Hi Nodcah</p><p>thanks for this instructable. I'm have the same problem, I am not getting anything at the serial monitor. any help please!!</p><p>thank you</p>
<p>If the FPS light doesn't go on, that means the code line <em>fps.open(); </em>didn't run properly. This means there is a bad connection somewhere because the Arduino can't communicate with the fps. </p><p>I can help you find the problem if you send a more zoomed out picture of your wiring (with the arduino and fps in the picture)! </p>
<p>Hi nodcah</p><p>I manage to fix the problem. secondly. i'm trying to use a servo like in step 12. should I still program the ATtiny. any help with how to go about it. </p>
<p>The use of the ATtiny85 is for extra security through a wall. If your implementation allows for just the fingerprint sensor to be showing, then the ATtiny is unnecessary. I don't have code pre-written for the ATtiny in a box, but using a servo library for ATtinys (I don't know one off-hand), you should be able to tweak the code found in step 7. Hope it helped!</p>
<p>Thanks for the quick respond. I really appreciate it.</p><p>These are the zoomed out pictures. I hope they are helpful.</p><p>i.e The last picture is what happens when I upload FPS_blink. LED still ain't on. </p>
<p>Hi nodcah</p><p>I manage to fix the problem. secondly. i'm trying to use a servo like in step 12. should I still program the ATtiny. any help with how to go about it.</p>
<p>And can you please send me the final Code that controls the servo. thanks. bigestbear@hotmail.com</p>
<p>Hi nodcah</p><p>I manage to fix the problem. secondly. i'm trying to use a servo like in step 12. should I still program the ATtiny. any help with how to go about it.</p>
<p>I am working with the same scanner and an arduino uno, however, I am not getting anything at the serial mointor </p>
<p>I am having the Same problem. di you manage solve it?</p>
<p>I love this concept. If the Arduino is optional how do you program the ATtiny85 without it though? Is also possible the concept of having two different outputs. Say opening a door or a garage door? I'm guessing I'll need two ATtiny and some different programming on the ATmega.</p>
Without an official arduino, you would need to use the at mega on the serial lcd kit to program the ATtiny. So follow the same steps for the normal arduino, but with the serial lcd kit. <br>Also, the ATtiny has multiple outputs, so you can definitely hook up another output to it! <br>Thanks for commenting!<br>-Nodcah =D
<p>hey can you show me ur code please ? I need an exemple for my door pls ^^ </p>
<p>I believe that the code you're referring to is in step 8 =)</p>
<p>Actually I didn't see it thx :D</p>
Can you all help me, i want to built an attandence thumbprint project , anybody here can tell me about the circuit or have some video how to make it , really need it , as soon as possible ?
You can follow the same instructions for this project, but just make the main case. Then you will need to enroll everyone's fingerprint that it would need to scan. Finally, the code can be changed to save an attendance log in the EEPROM which can be read only by scanning your fingerprint. <br>Something of the sort may already exist, so you should definitely browse around a little more if you need more specific instructions!
<p>That looks really nice, Great job!</p>
Thanks!! =D
What type of motorized lock would you use if used for a locker
<p>@nodcah, here is my current situation and I believe it branches off of seppderdepp's problem, running my blink example I get the same errors as him, so I figured alright, it's a programming error (im probably wrong), so, since I have everything hooked up I uploaded the final code just to make sure everything works before I hook it up permanently to the garage. Here is the current state of everything:</p><p>1.) LCD is on, nothing is displayed however.</p><p>2.) FPS blinks for a millisecond and takes a watchful eye to see and then stays off.</p><p>3.) RED LED is on for a bit when first attached to battery and then stays off (probably because there is no need for it to come on because everything else is not working at the moment.)</p><p>4.) Here is the output when I uploaded the final code, for you to hopefully interpret.</p><blockquote><em>In file included from C:\Users\hampt\Downloads\FPSGarageDoorOpenner\FPSGarageDoorOpenner.ino:20:0:</em></blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3/FPS_GT511C3.h:12:21: warning: extra tokens at end of #include directive [enabled by default]</blockquote><blockquote> #include &quot;Arduino.h&quot;;</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3/FPS_GT511C3.h:13:28: warning: extra tokens at end of #include directive [enabled by default]</blockquote><blockquote> #include &quot;SoftwareSerial.h&quot;;</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:9:25: warning: extra tokens at end of #include directive [enabled by default]</blockquote><blockquote> #include &quot;FPS_GT511C3.h&quot;;</blockquote><blockquote> ^</blockquote><blockquote>In file included from C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:9:0:</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.h:12:21: warning: extra tokens at end of #include directive [enabled by default]</blockquote><blockquote> #include &quot;Arduino.h&quot;;</blockquote><blockquote> ^</blockquote><blockquote>In file included from C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:9:0:</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.h:13:28: warning: extra tokens at end of #include directive [enabled by default]</blockquote><blockquote> #include &quot;SoftwareSerial.h&quot;;</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp: In constructor 'Response_Packet::Response_Packet(byte*, bool)':</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:89:108: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[0], COMMAND_START_CODE_1, COMMAND_START_CODE_1, &quot;COMMAND_START_CODE_1&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:90:108: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[1], COMMAND_START_CODE_2, COMMAND_START_CODE_2, &quot;COMMAND_START_CODE_2&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:91:105: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[2], COMMAND_DEVICE_ID_1, COMMAND_DEVICE_ID_1, &quot;COMMAND_DEVICE_ID_1&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:92:105: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[3], COMMAND_DEVICE_ID_2, COMMAND_DEVICE_ID_2, &quot;COMMAND_DEVICE_ID_2&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:93:66: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[8], 0x30, 0x31, &quot;AckNak_LOW&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:95:67: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[9], 0x00, 0x00, &quot;AckNak_HIGH&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:100:85: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[10], checksum_low, checksum_low, &quot;Checksum_LOW&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>C:\Users\hampt\Documents\Arduino\libraries\FPS_GT511C3\FPS_GT511C3.cpp:101:88: warning: deprecated conversion from string constant to 'char*' [-Wwrite-strings]</blockquote><blockquote> CheckParsing(buffer[11], checksum_high, checksum_high, &quot;Checksum_HIGH&quot;, UseSerialDebug);</blockquote><blockquote> ^</blockquote><blockquote>Sketch uses 15,732 bytes (51%) of program storage space. Maximum is 30,720 bytes.</blockquote><blockquote>Global variables use 1,451 bytes (70%) of dynamic memory, leaving 597 bytes for local variables. Maximum is 2,048 bytes.</blockquote>
<p>Have you tried using a downgraded version of Arduino? Maybe <a href="https://www.arduino.cc/en/Main/OldSoftwareReleases#1.0.x">try 1.0.5</a>?</p>
<p>I'm currently out of town so I can't access my project, however, I think the wiring of my voltage divider may be a problem. So right now here is how I have it.</p><p>PIN_2 goes to a 560 ohm resistor.</p><p>PIN_3 goes to a 1k resistor.</p><p>The opposite end of both resistors lead to a jumper wire that leads to D11</p><p>I have PIN_1 going to D10</p><p>Also on the schematic there is a connection between PIN_3 and the limit switch ground but does not have a dot on it. Is it connected or not.</p><p>If it is supposed to be how you say, where does PIN_3 go to?</p><p>You have been super helpful. thanks again. </p>
<p>Oops that is supposed to be a connection, thanks for the catch! Pin 3 on the FPS is the GND pin, which is connected to the LCD's ground. The picture in step 6 might help you too! :-)</p>
<p>Sorry I've been a bit preoccupied. Does it perhaps matter that i have the FTDI breakout board connected during testing? Also I have a designated ground area where the FPS, and LCD ground area both go into, and then it goes to the limit switch via 22 gauge wire. The same goes for VCC supplies. I would send you pictures but the solder connections would be hard to follow (if you still want them let me know.)</p>
<p>Having the FTDI breakout connected shouldn't interfere. And yes, please send a picture!</p>
<p>imgur.com/a/4SwHX</p><p>The wire that just goes to nothing off the LCD is the source wire (the jumper I had on it fell off.)</p><p>Tell me if you need a picture of something specific, and i'll get back to you ASAP</p>
<p>Hmmm... I can't really see the voltage divider clearly in the pictures, but that might be where your issue lies. Can you retake a picture of just the voltage divider (the two resistors) and that board. You may need to push some wires out of the way for me to see the connections clearly. Before taking a picture though, double check that the black wire is connected to pin 10 and the white wire right next to the black wire is connected to pin 11 through a voltage divider. I fixed the table in step 2 by the way, sorry if that was confusing you. I didn't realize it was wrong until now</p>
<p>Also for the voltage divider, the schematic has it coming from the same lcd pin and two resistors going to fps pins 2 and 3, however, in step six it appears to be the opposite of that, thanks for your help.</p>
<p>Pin 1 of the fps should go to DIO 10 and DIO 11 should be going to pin 2 through a voltage divider. The connections might be your problem</p>
<p>All right, so some good news, the FPS now powers on completely, and stays on (green light indicator) however the blink and enroll sketch are still not working. I also noticed the FPS seems to get suspiciously hot when turned on (cant put finger on back and parts of front for more than five seconds.) if this is a sign of a wiring problem it would be great to know! thanks for all your help with my noob questions :)</p>
Also, can you send me a picture of your setup so I can see if there is anything wrong with the wiring? Lastly, I'd suggest running a program that blinks an LED on the arduino and see if that works. This will tell you if there is a problem with programming the chip.
The fps actually does get that hot on mine too (it's technically supposed to run on 3.3v, so the excess energy is being released as heat). But for this application of it, it doesn't REALLY matter because it's on for such short periods of time
<p>Also, try following the suggestion I made on seppderdepp's comment :)</p>
<p>Hello. I am making this exact same project and was wondering how the 10 uF capacitor was connected into the board. Thank you in advance.</p>
<p>See step 7 for details. The 10uF capacitor is only for programming the ATtiny, not for operation. </p>
<p>Hy. At first great Projekt. But when i upload the Blink Example it always comes the message C:\Program Files (x86)\Arduino\libraries\Fingerprint_Scanner-TTL-master/FPS_GT511C3.h:12:21: warning: extra tokens at end of #include directive [enabled by default]</p><p> #include &quot;Arduino.h&quot;;</p><p> ^</p><p>C:\Program Files (x86)\Arduino\libraries\Fingerprint_Scanner-TTL-master/FPS_GT511C3.h:13:28: warning: extra tokens at end of #include directive [enabled by default]</p><p> #include &quot;SoftwareSerial.h&quot;;</p><p>what can i do?</p>
<p>Hello, I think I've found a solution to your problem. Try removing the comments that follow that line. If that doesn't work try updating your version of Arduino and use <a href="https://drive.google.com/folderview?id=0B_Q5x1Nsa--eaUZfWXBvT1I5MWc&usp=sharing">this folder</a>. </p>
<p>Ok now it's working. Thanks.</p>
What is the algorithm of saving fingerprints samples? And where these samples are stored, in controller or in sensor's memory?
All of the algorithms and actual storage/processing of the fingerprints is done on the fps module, not the ATmega. If you're curious, you should definitely take a look at the data sheet for the fps!

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Bio: I am a senior in high school and a member of a FIRST robotics team. I love to tinker on my own, which is mostly ... More »
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