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751 fingerprint sensor - template download
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751 fingerprint sensor - template download

by Crossroads on Wed Aug 26, 2020 1:40 pm

My customer bought 2 of 751 sensor (invoice 2333778). He wants to store industrial machine settings, including operator fingerprint templates, in a database and from an administrative station push setting to a machine. Pushing settings to the machine would also load the fingerprint into the sensor attached to the machine. I am writing the software (Python 3) to do this. Unfortunately, the library supplied does not include the functionality to upload/download templates. (It also doesn't check the checksum of returned packets.)
I was able to upload (what I think is) a fingerprint. Non-zero, non-readable, reasonably-sized. Step 1: copy the template of interest to the image buffer. Step 2: read the image buffer.
I was not able to download a print. I wasn't able to guess the process. Download to a char buffer? Char 1 or 2? Then what? Store the char buffer as a template doesn't seem to be a command. There are just too many possible combinations.
Any chance of an updated library to include template upload/download? Any hints or suggestions on the process to download a template? Thank you.

Crossroads
 
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Re: 751 fingerprint sensor - template download

by adafruit_support_carter on Wed Aug 26, 2020 5:08 pm


adafruit_support_carter
 
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Re: 751 fingerprint sensor - template download

by Crossroads on Thu Aug 27, 2020 9:12 am

I’m using Python 3 running on a Raspberry Pi.

Crossroads
 
Posts: 2
Joined: Wed Aug 26, 2020 1:13 pm

Please be positive and constructive with your questions and comments.