does that have other consequences as to only the IR?
For Blue Iris, try these
{ip_addressANDport}/admin?camera=DW1&ptz=34 ... off
{ip_addressANDport}/admin?camera=DW1&ptz=35 ... on
{ip_addressANDport}/admin?camera=DW1&ptz=36 ... auto
But beware that these commands do not actually turn the IR On/Off, but rather
34 ('off') sets Dahua 'DayNight' mode to 'Color'
35 ('on') sets Dahua 'DayNight' mode to 'B/W'
36 ('auto') sets Dahua 'DayNight' mode to 'Auto'
You might want to check out DahuaSunriseSunset.
signal=green
profile=1
lock=0
camera=cam-long-name
If you mean a preset command, then no. The preset command is:is that not for a PTZ command?