I've tried to connect my fingerprint sensor to arduino, but I always receive "Did not find fingerprint sensor" error with every default library examples.
The sensor was working well until two days ago.
The strange thing is that if I call the function ledOn or ledOff the green led turns on and off; than it isn't a communication problem.
I've thinked that the problem is the verifyPassword(), therefore I've tried to use the private checkPassword and print the packet.data[0]. That returns 1 -> communication_error
I'm desperate. I don't know what can I do. Help me please
I don't know what can I do.
Read the how to use this forum-please read sticky to see what kind of information that we need in order to offer informed assistance.
A link to the sensor data sheet.
What Arduino are you using?
What else is connected to the Arduino?
How is everything connected?
What code, libraries have you tried?
What did you do between when it worked and when is did not work?
What powers the project?
Oh, I'm sorry
The fingerprint sensor is FPM10A (http://repository.umy.ac.id/bitstream/handle/123456789/22709/FPM10A.pdf?sequence=13&isAllowed=y), but the mine one has only the 3.3v voltage supply.
I've tried the connection with 2 arduino uno and arduino mega
There is connected only the fingerprint sensor
I've connected all like every other times (fp sens tx to pin 2 and fp sens rx to pin 3)
I used the default Adafruit_Fingerprint library and I've tried every default examples code
2 days ago I have only tried to connect the fp sens with a 10 meters cable, but when I saw that it isn't working I restored the original connection with its included cable.
I've tried to connect the arduino with the usb cable and with a 12v power supply.