The v1.5 SD card image brings heat pump compatibility to all devices, even those that are 5+ years old. This includes support for stage 1 and 2 heating, and stage 1 and 2 cooling. If combined with the latest PCB design, it also adds stage 3 heating. It's proof of work. We're not only still supporting old devices, we're still giving them more features. No subscriptions. No 3rd party servers or clouds. These are the differences between a community project and a corporate product.

Just published all the latest schematics for new PCB design. 🥳 1. Added a 5th relay 2. Switch to a ribbon cable, and 3. Replaced the reset switch (which only works with the original Pi Zero) with a power switch (which works with all Pi Zero boards). If anyone out there has a device and can test the new v1.5 SD card image, I'd love to get enough feedback to make that an official release.

I made a lot of progress with building open source hardware today. Took several hours (and is still ongoing). I'm not talking about the sexy, fun, development work. No, I mean I hand assembled several units and I test every single one before I ship it out. I rarely find any defects, but I don't want a single customer to get a unit that has any issues. Reputations take a long time to build and are so easy to damage, it's worth the extra time investment. #OpenSource #hardware #OpenHardware #FOSS