I am trying to do a project with this fingerprint scanner on a PSOC 4. I have not been able to even wake up the Fingrprint scanner. Does anyone have any examples or resources I can use?
The best resources we have available will be the [GT-521Fx2 Datasheet, [programming guide and our [Fingerprint Scanner Arduino Library. Outside of that, I’m afraid we do not have any information specifically related to programming a PSOC 4 to work with the Fingerprint Scanner.](GitHub - sparkfun/Fingerprint_Scanner-TTL: Repository with example code for SEN-14585 & SEN-14585 at SparkFun.com)](https://cdn.sparkfun.com/assets/learn_tutorials/7/2/3/GT-521F52_Programming_guide_V10_20161001.pdf)](https://cdn.sparkfun.com/assets/learn_tutorials/7/2/3/GT-521FX2_datasheet_V1.1__003_.pdf)
I am also having trouble with this unit. I have tried powering it from both sides per the hookup guide wiring and neither side makes the board light up.
Does anyone know if it is supposed to have a back light and if this would turn on from the get go with power connected? The image from the hook up guide (below) seems to indicate that it should have some lights on it but maybe that’s only after it has done some kind of configuration?
I tried to connect to it with a FTDI board and also tried connecting it straight to a 5.5V bench power supply. Neither made it light up.
finger_scanner_led.PNG55 KB Place inline
It does appear to require programming to set the sensor LED to be ON upon startup.
I hope this helps!
I got the SDK Demo from the SparkFun site to work. The back light only comes on when you are capturing a print. Also for some reason the one I have doesn’t have the LED that the hookup guide picture has. It has the pads but no actual LED.
I used the examples to get it all working, they are pretty easy to use. however i can’t get it to go to stand by mode. As mentioned in page 33 of the programe guide.
however the hook up guide seems to offer a second solution and talks you through it.
i’ve connected ICPCK 3.3v and ground back to the Arduino but to no effect.
I’ve had one fail already which i suspect is due to being ON for 6 months continuously. the LED’s are considerably duller than the new replacement.
any advice would be welcome.
Dano