Comments: Fingerprint Scanner Hookup Guide
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Hi. I'm using the FPS GT511C3and arduino Uno to make an attendance biometric system. I'm using 10k Ohm resistors to create a voltage divider circuit to reduce 5V to 3.3V.
I followed the exact same procedure to connect hardware that was mentioned in the site in your article. After connecting the FPS to Arduino Uno, I noticed that even though the processor behind is getting heated up the FPS green power LED is not turning on. Can you please help me out?
Thanking you in advance
Hi,
This sounds more like a technical question. Based on your explanation,it sounds like there might be something with your connection causing a short or it is wired incorrectly. The sensor should get warm but not hot to the touch as stated in the troubleshooting section of this tutorial. You can also try to power the sensor with 3.3V as opposed to the default 5V.
Otherwise, I recommend checking out our technical assistance page for the best support.
Hi, i am trying to interface the scanner GT511C1R with the arduino uno but i dont have the JSH connector, so i saw the post but i really don't understand how am i going to code it. Can anyone help, how maybe to connect it to the uart pins in arduino using the D+ and D-?
Yeah, I highly recommend getting the JST SH connector to breadboard [ https://www.sparkfun.com/products/14425 to use the sensor. The Arduino library talks with the sensor via the fingerprint scanner's serial UART pins. There currently is no support in the library to use the USB pins with an Arduino. Additionally, an Arduino Uno does not have USB data pins on the ATmega328P to communicate. The back of the board has pins broken out to connect to a computer's USB port as explained in the troubleshooting section => https://learn.sparkfun.com/tutorials/fingerprint-scanner-hookup-guide/troubleshooting.
Otherwise, try checking the Arduino forums or the Arduino Stack Exchange to see if anyone has tried connecting USB pins from a sensor to an Arduino Uno's ATmega328P pins before.