Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

Welcome Guest!

Did you know that you can enjoy many members-only features simply by quickly registering (no CAPTCHA!)?

Registering gives you access to our giveaways, forum features, increased search performance, access to our Download Library, create your own blog & gallery, and more!

Once you have registered, stop by in 'Hello World', and introduce yourself.

Reset

1

Joe Novosel's Elk Notes

Archive

Elk M1 Zone Temperature Sensor protocol decoded

Posted by N4HC , 03 June 2012 · 2094 views

and 1 more...

Through reverse engineering I was able to decode the protocol used to transmit temperature to a main zone input on the Elk M1 control. This will ONLY work on a main zone and NOT on an input expander. This is by design on the Elk itself.

So here it is. Manchester encoded:

· 3 start bits of ‘1’
· 8 data bits –...

Read Full Entry →