>I can't understand how you can let someone update part of the code on something compiled. You can provide your closed source part as a precompiled library or

>I can't understand how you can let someone update part of the code on something compiled. You can provide your closed source part as a precompiled library or object file together with the source code for the LGPL part and build scripts that let the recipient relink it with a (possibly modified version of) the LGPL code to generate a new final binary. A pain yes but not impossible. Having a screen or not is irrelevant, nothing says the recipient has to access the source on the same device as the binaries run.