Hi,
i have a DS-2cd2t52-i5 camera, I got it from a friend, becouse it was set aside after a firmware upgrade, for a year... It was bricked. I tried all firmwares what i got from several places, for the R6 platform..
V5.5.82_Build190909,
V5.5.53_Build180730(1.3MP, 2MP, 4MP, 5MP,1X31,1X41,67X5)...