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I don't need most of the other functions so removing the others would work. Is there a guide somewhere on how to build my own firmware (ie once I have changed the file)?
Yes, there is https://github.com/espruino/Espruino/blob/master/README_Building.md in root of the repository, there is even (a bit outdated) example for PUCKJS. It should be enough to run provision script for board name (that could even download the compiler?) and then use make line from puckjs example there
make clean && DFU_UPDATE_BUILD=1 BOARD=PUCKJS RELEASE=1 make
If compiler is not downloaded automatically I'd suggest getting version 8-2019-q3-update from https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm/downloads
fanoush
@MattB
Thanks all, I'll try those suggestions.
@Gordon The plan is to use the device for logging temp and motion. It's going in the post at the moment for testing and 2-4 days seems to use about 17k of the 40k, so I am going to need to get more space if it's going to go on longer trips. I will try the compression you suggested. I suspect that will give me enough.
@allObjects That looks interesting. I'll put that down for version 2 of my tests :)
@fanoush I don't need most of the other functions so removing the others would work. Is there a guide somewhere on how to build my own firmware (ie once I have changed the file)?