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On ARM targets this could be a really neat thing to build in.
It uses static buffers for up/down communications so takes away precious RAM but is easy to change to use some flat buffer variable. On Bangle 2 I imagine another checkbox in setting that could allocate buffer and enable this and then free it when disabled.
fanoush
This is great, thanks! I'm not getting that much time for work these few weeks with school holidays, but in a month or so I hope to be able to look into this further. On ARM targets this could be a really neat thing to build in.
I seem to recall at some point you had some reasonably simple code to make Espruino actually communicate with another device using SWD, although I'm not sure if that did RTT? One very cool addition would be if we had a microcontroller that would effectively act as a USB Serial -> RTT bridge...