After initially creating my HTTP Push Data Advanced sensor, there was a single channel shown -- "Downtime" (ID -4). The XML payload expected by the push data channel requires a channel to be specified, and when I push data to the sensor, the channel I specify is created on-the-fly. But when I try to push to <channel>Downtime</channel>, it creates a new "Downtime" channel instead of pushing to the original "Downtime" channel.
How do I push to the original, system-defined Downtime channel?
The HTTP Push Data sensor says to omit the "value" parameter in order for the push to be treated as an error, but that doesn't seem to work for the HTTP Push Data Advanced sensor.
And also -- where can I find the reference for the XML/JSON data format? The only thing I have to refer to is the example given for the sensor; I can't find anything more detailed... Maybe the information I am looking for is specified there... ?