Hello all, sorry for my english...
I have this camip (DS-2CD2186G2-ISU ; 4K, AcuSense, etc...) work great but... impossible to update !
My last one was build in may 2021, with factory firmware V5.5.154 build 201010 (B-R-G3-0)
I found no where this firmware ?!
only this one : V5.5.154 build...