I have one camera 2cd3132F_IWS012015082"CCRR536"""" v 5.3.0 150513
I tried with the downgrader 5.3 -> 5.2.5 but it failed. TFTP says transmit
Now the camera is in v4.0.8 mode i tried different CN firmware digicaps but its the same
EN firmware worked. Now the camera is CCCH