An example protocol that splits a message into several parts

Hello,
Is there a sample protocol in traccar that splits a message into several parts and sends or receives it in several steps?

Photo upload is probably one example where a photo file is split into multiple messages. It's supported by several protocols.

Thanks, do you remember the name of one of these protocols? I want to use them as an example.

Search for KEY_IMAGE and you'll find all of them.

thanks a lot