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(DIY) How to improve HC3 Zwave coverage



I had an issue with some Z-wave devices that insists to be disconnected from HC3. Have tried to relocate HC3 (as much as possible w/o irritating my wife) without success, always had some disconnected devices.

But during the relocation have noticed that in some specific spot all devices have been connected. The problem to achieve full coverage, requires accuracy of ONE millimeter!

Have tried to understand, why? I have my own SMS system connected to HC3 and when a specific corner of HC3 has touched the antenna (accidently) I have a good coverage.


I took a piece of metal and actually stuck it under HC3 like antenna (see below), now I have an excellent coverage. It's sound like a joke, but it's not a joke at all.

After that have found an image of HC3 board, and YES, the Z-wave antenna is actually located on that corner of the box.

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I am very curios if it helps to others... please let me know if it works for you too.


Edited by cag014
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5 hours ago, cag014 said:

By the way on latest release in Diagnostic you have Z-wave statistics for every device.  How frequently its communicates and if there are any failures. Looks like they took the idea from Z-wave monitor 😁. Hopefully in the future they will add Zigbe and Nice also.

Below you can see my biggest consumer... Aeotec  3 clamps energy meter.  569 communication frames per hour (I believe this is an average)

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Thanks.... I saw it but currently I switched back to the stable release... I got a strange behaviour on the Z-Wave net....

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I'll try next stable build....

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