I had about 40 nearables and they were working fine. Then for about a couple of weeks, I put them in a closet and didn’t touch them. When I come back to them they were not discoverable unless I move them then they become discoverable again.
I want to know if they switch to sleep mode or something after some time? And what is the time period for them to go to sleep?
By default, Stickers advertise the Nearable packet every ~ 2.5 seconds when not in motion for 10 seconds, and twice as often i.e. every ~ 1.2 seconds when moving and for the 10 seconds after they stop moving.
How exactly are you doing the discovering? The Estimote app? The SDK? iOS or Android? Can you check their battery level with the Estimote app?