I have just found out that there is a (much) newer version of firmware from DaHua, but in looking through the compatible NVR's I do not see my EXACT model found. I am currently running version 3.215.0000000.3, Build Date: 2017-12-11, and I am looking at
DH_NVR5XXX-4KS2_MultiLang_V4.001.0000000.1.R.200319
The compatible models include 58xx, 54xx , and some 52xx models. There is 5216-16P-4KS2E (mine is not E), 5216-4KS2 (No PoE), 52A16-16P-4KS2E, but no plain old ordinary 5216-16P-4KS2. I think I should still be ok to upgrade to the V4 firmware, but just thought I had better ask the experts because I have read where the firmware can be very picky about which models are compatible, and just to be sure since I have also read that there is no going back.
Thanks.
Edit: Also, I wanted to make sure that DMSS still works.
DH_NVR5XXX-4KS2_MultiLang_V4.001.0000000.1.R.200319
The compatible models include 58xx, 54xx , and some 52xx models. There is 5216-16P-4KS2E (mine is not E), 5216-4KS2 (No PoE), 52A16-16P-4KS2E, but no plain old ordinary 5216-16P-4KS2. I think I should still be ok to upgrade to the V4 firmware, but just thought I had better ask the experts because I have read where the firmware can be very picky about which models are compatible, and just to be sure since I have also read that there is no going back.
Thanks.
Edit: Also, I wanted to make sure that DMSS still works.