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Ok, when can we download the new 2.1.5 toolset?

You could try connecting using a better quality usb cable. I have some (cheap) usb cables that produce similar results. If I use one of my better quality cable, it works fine.

I'm awaiting a port to Z-Uno too! Combined with OpenTerm library (which also needs to be ported) this makes an awesome way to create your own Z-Wave enabled thermostat.

Those dc-dc converters are really dirt cheap pre-fabricated. Here's an example on ali express for 31 euro cents and no transport costs (into the Netherlands): http://nl.aliexpress.com/item/1pcs-Mini360-DC-DC-Buck-Converter-Step-Down-Module-4-75V-23V-to-1V-17V-17x11x3/32786777084.html?spm=a2g0z.searc...

Hi all, I've set myself an ambitious goal: I want to build myself an opentherm controller that communicates via Z-wave with the thermostats in each of my house's rooms, then controls my boiler via opentherm according the heat requested by those thermostats/ The components I've selected for my projec...