I'm trying to get XML Custom EXE sensor to work in PRTG.

I want a sensor to grab data from a webpage and display the results in PRTG. We have created an EXE in c# that authenticates the webpage and grabs the data and returns it in XML, memory only, no file written. However I keep getting the error:

XML: The returned XML does not match the expected schema. (code: PE233)

Our output:

<prtg>
  <result>
   <channel>Type</channel>
    <value>Service</value>
  </result>
  <result>
    <channel>Unit</channel>
    <value>PH</value>
  </result>
  <result>
    <channel>Label</channel>
    <value></value>
  </result>
  <result>
    <channel>Slot</channel>
    <value>A</value>
  </result>
  <result>
    <channel>HW Version</channel>
    <value>3.62</value>
  </result>
  <result>
    <channel>Serial Number</channel>
    <value>030362002110</value>
  </result>
  <result>
    <channel>Downlink RF Power (dBm)</channel>
    <value>-37.1</value>
  </result>
  <result>
    <channel>Alarm Count</channel>
    <value>0</value>
  </result>
  <result>
    <channel>Alarms</channel>
    <value>None</value>
  </result>
  <result>
    <channel>Max input power (dBm)</channel>
    <value>4</value>
  </result>
  <result>
    <channel>Module State</channel>
    <value>Open</value>
  </result>
  <result>
    <channel>Uplink Gain (dB)</channel>
    <value>1</value>
  </result>
  <result>
    <channel>Downlink Gain (dB)</channel>
    <value>-5</value>
  </result>
</prtg>

Any ideas what we are missing in this output?

Thanks for the assistance.

Article Comments

Hi,
in the sensor Settings please activate the option "Write Result to Disk". What results do you get there?


Nov, 2015 - Permalink

Channels can only hold an integer or float value. Text values like below are not allowed!

  <result>
   <channel>Type</channel>
    <value>Service</value>
  </result>

Nov, 2015 - Permalink

Ok, here is our updated output and now we are getting a Response not well formed

<?xml version="1.0" encoding="UTF-8" ?>
<prtg>
  <result>
   <channel>1</channel>
   <text>Type</text>
   <text>Service</text>
  </result>
  <result>
   <channel>2</channel>
   <text>Unit</text>
   <text>PH</text>
  </result>
  <result>
   <channel>3</channel>
   <text>Label</text>
  </result>
  <result>
   <channel>4</channel>
   <text>Slot</text>
   <text>A</text>
  </result>
  <result>
   <channel>5</channel>
   <text>HW Version</text>
   <value>3.62</value>
  </result>
  <result>
   <channel>6</channel>
   <text>Serial Number</text>
   <value>030362002110</value>
  </result>
  <result>
   <channel>7</channel>
   <text>Downlink RF Power (dBm)</text>
   <value>-37.1</value>
  </result>
  <result>
   <channel>8</channel>
   <text>Alarm Count</text>
   <value>0</value>
  </result>
  <result>
   <channel>9</channel>
   <text>Alarms</text>
   <text>None</text>
  </result>
  <result>
   <channel>10</channel>
   <text>Max input power (dBm)</text>
   <value>4</value>
  </result>
  <result>
   <channel>11</channel>
   <text>Module State</text>
   <text>Open</text>
  </result>
  <result>
   <channel>12</channel>
   <text>Uplink Gain (dB)</text>
   <value>1</value>
  </result>
  <result>
   <channel>13</channel>
   <text>Downlink Gain (dB)</text>
   <value>-5</value>
  </result>
</prtg>

Nov, 2015 - Permalink

Hi,
please make sure in your xml the following tags are present only once per <result>:

<result>
   <channel>CHANNEL NAME</channel>
   <value>NUMERICAL VALUE</value>
  </result>

the <text> tag has to be outside of any result tab but within the <prtg> tag.


Nov, 2015 - Permalink

Hi,

Ok we got it working. Now an issue is that some information we are displaying has a negative value (-37.5) this displays as zero (0). Where as another value -5 displays correctly.

Suggestions?


Nov, 2015 - Permalink

Hi,
in the <result> tag you are returning the -37,5 please add <float>1</float>. Then it should show correctly.


Nov, 2015 - Permalink