Grove - Capacitive Fingerprint Scanner

Sinusenzym · June 16, 2021, 2:49pm

Hey guys, I wanted to venture a bit on the subject and found the Fingerprint, plus ordered the Seeedunio 4.2.
However, I now with the example do not get the output that would be expected.
Much more the finger sensor pulses in a blue tone and the output says

    Uart===> : EF.1Uart===> : EF.1.FF.FF.FF.FF.1.0.8.31.0.1.4.0.F.0.4E. 
 
 
Usage:
    Please put your finger on the touchpad, from green light which on the touchpad lights on till it lights off.
    Repeat for 4 times.
    If the red light lights on, it indicates that an error occurred.
 
 
 
Uart<=== : EF.1.FF.FF.FF.FF.7.0.5.0.0.0.0.C. 
 
Register ok!
EF.1.FF.FF.FF.FF.1.0.8.32.0.FF.FF.0.7.2.40. 
Uart===> : EF.1.FF.FF.FF.FF.1.0.8.32.0.FF.FF.0.7.2.40. 
 
 
Please put your finger on the touchpad, from green light which on the touchpad lights on till it lights off.
To verify your finger print.
 
 
 
Uart<=== : EF.1.FF.FF.FF.FF.7.0.8.24.5.0.0.0.0.0.38. 
 
Verify failed,error code = 0x24 
Ret param = 5.0.0.0.0. 
 
Please check the error code through datasheet!
EF.1.FF.FF.FF.FF.1.0.3.D.0.11. 
Uart===> : EF.1.FF.FF.FF.FF.1.0.3.D.0.11. 
 
Uart<=== : EF.1.FF.FF.FF.FF.7.0.3.0.0.A. 
 
Operation succed.
Delete ok!

The sensor is connected with the 3V3 pin and to GND, the RX and TX go to D2 and D3

and all the Output is without touching the sensor with anything

Does anyone here have an idea what it could be

Regards Sinusenzym

Seeed-Liu · June 18, 2021, 2:52am

Hi, Sinusenzym
If it is convenient, take a device connection diagram to us, and also the program files you use. We will arrange engineers to do the test and verification next week.