we appreciate your inquiry.
Please note that to use the HTTP Content sensor, the [ ] (square brackets) are mandatory. It should look like this:
Description: Script gives back current status of disk free (%) and CPU usage (%).
If your HTTP Data is XML/JSON encoded, you may want to consider using the HTTP XML Rest Value Sensor. In this case the data must look like this:
<?xml version="1.0" encoding="UTF-8" ?>
<channel>Channel 1 (integer)</channel>
<channel>Channel 2 (integer)</channel>
<text>The sensor's message</text>
Or like this:
"channel": "Channel 1 (integer)",
"channel": "Channel 2 (integer)",
"text": "The sensor's message"
If you're not able to "control" how the data is presented by the device, you may want to consider using one of the following sensors:
These sensor types allow you to create a custom script/application that will fetch the data (as provided by the device), then "adjust" it's format to be compliant with the API for Custom sensors and then feed the results back into PRTG.
For more information, see PRTG Manual: Custom Sensors.
Luciano Lingnau [Paessler Support]