That is incorrect.. I used Geoarm aka alarm club for about 1 year approximatively 10 years ago. After that I never used them again. I can see they still don' t know what they're doing.From alarm club rep.
And yes, your proa7 will work with any Honeywell products on our site, including 5800 series, six sensors, and pro six sensors.
The only items that cannot integrate, are keypads designed for other series, and batteries
so the 5834 key fob should work with the proa7
According to AlarmGrid, the ProA7 with the takeover module that allows it to communicate with the 5800 series sensors cannot not be used with life safety sensors (smoke and CO detectors). I found a combability chart from Resideo on AlarmGrids website.
Here is the list- Honeywell Home PROTAKEOVER Transmitter Compatibility Chart - Dated 6/20 Rev. A
I don't see the keyfob on the list.
Here is the installation instructions for the module- Honeywell Home PROTAKEOVER Installation Instructions - Dated 6/19 Rev. B
This is taken from the compatibility chart- "Using devices not listed here as compatible is not recommended and may cause unexpected behavior"
So you might be able to use the keyfobs but it looks like they could cause issues with the system. Personally, I would wait for AlarmGrid to get back to you and see what they say.