I have 15 tp-link switches total,
HS210, 200 and a few plugs.
All of them seems to go offline all the time and randomly, even the onesin the same room as the router provided by my ISP.
Allocated IP to each switches.
AP to further enhance the signal.
Updating all firmware (I have 2 switches that can't seem to upgrade and are stuck at 1.2.5 even after trying to instal them again multiple times).