Dear @nanonus,

We bought 6 EAP110 (indoor) for our company. I configured them with a single SSID via the Omada Software controller (on my computer - so it's offline most of the time).

We have lot of connectivity problems. For example, sometimes I have packet loss when I ping the router or I have high latency.

I just read that this EAP doesn't support 'seamless roaming' so it's possible that clients are connecting on the 'wrong' AP? Should I use a different SSID for each AP?

Do you have lots of wireless clients in your company network?

The EAP110 only works on 2.4GHz, it could be easier to get a high latency on 2.4GHz when the channel is crowded with many clients. 

You may refer to the guide below to try reducing the wireless interference. If it's possible, you could also use different SSIDs for checking.

https://www.tp-link.com/support/faq/2511/