[tooltower]

This very much depends on the ecosystem they had in their specific embedded environment. Some have a few kilobytes of working memory: so they'd have to download the file and write it straight to flash (yes, security is a problem but manageable). There are many common cases where, for instance, malloc is disabled.

You don't always have off-the-shelf packages for every conceivable environment you work in.

[tinus_hn]

It’s a 50 years old protocol, chances are you’re not the first one who has this problem.