Error Bad Request when trying to trigger siren on TIOC model

[SubtleOrc]

Dahua DH-IPC-HDW3849H-AS-PV-ANZ

The URL I am trying is

http://ipaddress/cgi-bin/coaxialControlIO.cgi?action=control&channel=1&info[0].Type=2&info[0].IO=1

To turn the siren off.

I am sure I have gotten this to work many months ago but I must have messed with the settings somehow and now it no longer works.
Any clues on what I might look for?

The response I get from the camera is
Error
Bad Request!

 

[TonyR]

FWIW, runraid said here in this thread that the URL below is turn the siren OFF:

http://ipaddress/cgi-bin/coaxialControlIO.cgi?action=control&channel=1&info[0].Type=2&info[0].IO=2

 

[SubtleOrc]

Hi.. .IO=2 returns a OK however .IO=0 or .IO=1 returns the
Error
Bad Request!

 

[guykuo]

Do you need the TriggerMode in the URL?

http://ipaddress/cgi-bin/coaxialControlIO.cgi?action=control&channel=1&info[0].Type=2&info[0].IO=2&info[0].TriggerMode=2

 

[SubtleOrc]

Thanks for your reply guykuo
.TriggerMode=0,1 or 2 replied with OK but the siren did not activate on any of those.

 

[guykuo]

Well no. That is the siren OFF command. If I read the protocol correctly....

Turn on siren
http://ipaddress/cgi-bin/coaxialControlIO.cgi?action=control&channel=1&info[0].Type=2&info[0].IO=1&info[0].TriggerMode=2


Turn off siren
http://ipaddress/cgi-bin/coaxialControlIO.cgi?action=control&channel=1&info[0].Type=2&info[0].IO=2&info[0].TriggerMode=2

 

[SubtleOrc]

Well no. That is the siren OFF command. If I read the protocol correctly....

Turn on siren
http://ipaddress/cgi-bin/coaxialControlIO.cgi?action=control&channel=1&info[0].Type=2&info[0].IO=1&info[0].TriggerMode=2


Turn off siren
http://ipaddress/cgi-bin/coaxialControlIO.cgi?action=control&channel=1&info[0].Type=2&info[0].IO=2&info[0].TriggerMode=2

Thanks for your help but I just get
Error
Bad Request!

With those commands...

I think my camera must be misconfigured or something. May have to go for a factory reset