Important Format Restrictions:
The lastUpdate field in a sensor update is a timestamp (unix time, epoch) and therefore must be a long
For spatial queries, a channel named location with type ‘geo_point‘ must be added to the stream, and the field current-value of the location channel must be a string that represents the latitude and longitude as comma separated values: “34.5445 , 3.5533”
The field current-value of every channel is the only field that can be used for data composition, and it must be a string, numeric or boolean json value. No nested json documents are accepted.