Hey guys, I got this sensor for a TAFE lesson (Basic Fingerprint Sensor With Socket Header Cable, SKU: ADA4690) I needed to get it working for an assessment which I could not get done and have now been granted extra time to get it working as its the last thing that I need.
No matter what I do I cannot get the sensor to show up in the devices list, the pinout is as follows:
Red: pin 17
Yellow: pin 10
Black: pin 9
White: pin 8
I have tried swapping the RX and TX pins but nothing shows still, this is the first time using a device like this. I cant get anything to show in the device list and test code does not work due to this. The sensor lights up green but nothing changes.
If anyone could please give me assistance on this, it would be greatly appreciated!
Some of these units come with an extra 4 cables from the JST on the board. We’re under the impression that these are for USB communication (two of them are D+ and D-, USB protocol), but unfortunately, Adafruit doesn’t seem to refer to these extra cables in their guides at all. These may allow you connect directly to the computer but this has not been tested. You can also always go the route of a serial-USB converter, more on this below.
Using the built-in UART on the Pi requires disabling the serial console and enabling the serial port. If you have not done this already, it could be the cause of the issue. Instructions for this are detailed in the guide.
