Use several Adafruit Optical Fingerprint Sensors

[JoanCS]

I need to create an access system and I want to control it with "Adafruit Optical Fingerprint Sensor".
There are several access points far from each other.
At each point I would put an Adafruit Huzzah ESP8266 Wifi with an Adafruit Optical Fingerprint Sensor.
The idea is to have a MySQL DB accessible to all readers and to share the DB with users.
What I would like is to read a loan and compare it with the one I have on file and associated with the database, a MySQL.
From what I can see, each Adafruit Optical Fingerprint Sensor has its own BD and I'm not interested in that. I can't go to each device and record fingerprints.
How can I resolve this issue?

[adafruit_support_bill]

The device does have the capability to upload & download fingerprints. So it should be possible to share these between multiple devices.

See the documentation for details: https://learn.adafruit.com/adafruit-opt ... /downloads

[JoanCS]

Thanks.
I've been looking at the documentation and examples from the bookstore. I don't see where to start.
I'm not looking at the right documentation or I don't understand it. Do you know of any examples that could help me? Thanks.

[adafruit_support_bill]

We do not have any example code for a project like that. But the library does support all of the commands for the device.

See sections 6.2.6 and 6.2.7 of the device user manual for upload/download command descriptions: https://cdn-shop.adafruit.com/datasheet ... ualV15.pdf

The corresponding library calls are: "loadModel" and "storeModel": https://github.com/adafruit/Adafruit-Fi ... gerprint.h

[JoanCS]

Thanks. I've been looking at the documentation and what you told me. I don't see how to share the information between multiple readers. Maybe I don't have the right level. Thanks.

[adafruit_support_bill]

The documentation describes commands to read fingerprint information and commands to write fingerprint information. So it should be possible to read fingerprint data from one device and write it to another.