Andrew, I am actually new to Ruckus this is my first time of installing it. Concerning your questions'
It is mounted 6m above the ground
I can only see the software version 18.104.22.168.837, can't find the firmware version please how do I get it?
The were mounted on the 6" standoff and nothing is close to it.
The transmission power is set to 1db but I set it to full update the changes and it went back to 1db. The APs are powered from a POE switch. As you adviced I changed it to half (-3db) no visible change in the range coverage of the wifi.
The four light indicators are all showing green (Power, CTL, AIR, 2.4G, 5G), there is no LLDP MED light.
One AP is placed in a flat of 5 rooms, well centralized but the wifi cannot go pass 7m. Even when the sight of the AP is visible the wifi range gets faint.
The clients are mostly HP elitebook laptop, Samsung phones, Apple phones, etc non of these can get the connection if outside 7m range.
2.4GHZ Channel is smart-select and channel width is 20Mhz 5GHz channel is smart-selectg and channel width is 20Mhz
Are you sure it's 6m? We recently did a POC with a competitor product, we found that when we mounted the APs 3.5m off the ground ( which is where our Ruckus APs were original, the APs became unusable. That install hight with Omnidirectional APs is beyond my experience. I would re-mount the APs by using some threaded conduit, and some electrical boxes. Or I would consider an AP with external antennas - but I wouldn't continue to attempt to improve WI-Fi with the APs at the hight they're at now.
To exclude the 'unleashed firmware' from potentially being your issue, I would advise you to take a single AP and re-image it to the Solo version of the AP software and re-test. Making sure to record the distance from AP and your change in SNR. All of this you can do in the CLI, since you're without the benefit of a controller. Software, is in the support portal, you can download simply by registering an account ( which I think you have if you're able to post here?) Finally, were you ever able to get IPERF3 running? Helps to have numbers to quantify your poor performance.
A firmware update is dictated and I have tried to upgrade from TPTF, FTP, WEB and all gives the same error as
Currently reading control file.
The upgrade failed. The following reason was given.
Control file download problem
Here are some other things you need to check
Check that all network cables are firmly connected .... Check that the upgrade method, server name/address or HTTP URL, Login info (When using ftp) and image control file info were entyered correctly. Check that image control file and its content are correct for your product model."