Help with read fingerprint but conpare and store in local raspberry web server

[ngohuunam]

Hi, thanks for your library.

I work for my own attendance project, R503 fingerprint module connect to esp32. Is it possible to transfer fingerprint captured image to esp32 and esp32 convert image to hex than post to raspberry web server to compare and store?

My fingerprint module is R503 192x192 resolution

Thanks

[hkieninger]

Hello,
According to the datasheet one can upload the character file with the "UpChar" command to the device interfacing the fingerprint module. This might be what you are looking for. However, I haven't implemented this and will not get to do it in the foreseeable future.

Best regards

[ngohuunam]

May I know method int uploadImage(uint8_t *image, uint16_t &size); working for my case? If yes, could you please help me some example code?