How to upload data to program over USB port

2018-03-21 16:44:01

I am working on a set of Visual poi (like these https://lighttoys.cz/store/vpoi/v4/) and need to upload new pictures to the controllers every now and again. Currently I use a program to convert a picture in to code, paste that code in to an Arduino sketch as a variable and upload the sketch. What other ways are there to upload a new image (preferably without re-uploading the entire sketch)?

Cheers