Hi Cynthia,
Thanks for the reply.
However, the URL I'm asking about is the motion detection URL.
Rather than get a snapshot image of the channel, I would like to know if motion has been detected on that channel.
The URL in my question works, but only for motion on the first channel. Is this a known bug, or am I using the URL incorrectly?
Thanks
Dan

Hi,
I have a Reolink NVR (RNL8-410) with multiple Reolink IP cameras attached.
I am integrating it into my Home Automation.
I have been able to use the snap URL - http://192.168.X.Y/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=**CODE**&user=**USR**&password=**PWD** to retrieve images from each of the cameras by altering the channel number in the URL.
I am also trying to use the motion detection URL - http://192.168.X.Y/cgi-bin/api.cgi?cmd=getmdstate&channel=0&user=**USR**&password=**PWD**&stream=1&rs=**CODE**
However, when I try and change either the channel or stream ID in the URL, I seem to only be returned with the motion detection status of the first channel.
What am I doing wrong?
How can I call the interface of the NVR to find the current motion detection status of each of the channels?
Thanks
Dan