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    Dahua IPC-HDW1639T not getting IP from dhcp

    I've just acquired a new IPC-HDW1639T which I've tried to test and configure before installation. It appears to power up (white LED comes on then goes off) and its MAC address appears on the LAN. But it doesn't appear to be requesting or receiving an IP address: the dhcp server doesn't log any...
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    Dahua VTO2202F "Villa Door Station" -- SIP Groups & other weirdness

    I have been experimenting with a Dahua VTO2202F (PoE version) for a week or so. I've found a few nice features, several missing features and some stuff that is so weird that I think I must have misunderstood what's happening. The door station hardware is elegant and looks like it will last, and...
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    Frequent unexplained reboots

    I'm running six Dahua cams in two locations: - 2x SD22404 running V2.623 - 2x IPC-HDBW2431 running V2.8 (PoE power) - 1x IPC-HFW1435SP running V2.8 - 1x IPC-HDBW4431 running V2.42 (PoE power) Only one of these is completely stable: the HDBW4431. The others all reboot several times a day...
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    Documentation for the Dahua HTTP API?

    Hi all Is there any definitive documentation of the current (or failing that, a relatively recent) version of Dahua HTTP API? The most recent documentation I have is an Amcrest-branded "Revision 2.12" document dated 2017-03-15. That runs to 256 pages, but must be at least two years behind...
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    How to "factory reset" a Dahua camera that's not bringing up an ethernet interface?

    Hi all - I have a Dahua IPC-HDW2431R-ZS-B (IP67 4MP IR mini-dome) installed on an outside wall. After running happily for over a year it went offline a few days ago. The PoE hub showed it consuming power, and another camera showed it's IR leds were on, but it doesn't respond to pings and...
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    Dahua API "Download media file between times"

    I was happy to discover the "Download media file between times" API call, ie. http://<server>/cgi-bin/loadfile.cgi?action=startLoad&channel=<ChannelNo>&startTime=<starttime> &endTime=<endtime>[&subtype=<typeNo>] I was even happier that it seemed to work almost immediately with minimal hassle...
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    SD42212T-HN - does it actually HAVE an SD card slot?

    Hi all I'm having a stupidly difficult time trying to put an SD card in an SD42212T-HN. The spec says that it takes a Micro SD card of up to 128GB, but I cannot find a card holder or slot anywhere. Any suggestions? Does it really have this slot? Thanks Sean
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    Dahua PTZ over-voltage - recoverable?

    I accidentally connected an SD22204T-GN to a 24V (actually, ~26V) supply instead of the 12V it requires. It was only connected for about 20 seconds. Now it seems to be dead - no signals at all on the Ethernet cable. I can't see anything in the manual about a fuse or circuit breaker. Should I...
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