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Comment: additional data upload


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Introduction

This page will go into the technical depths about the timing of data acquisition in general.Some abbreviations will be used for the sake of simplicity.

DA = Data Acquisition

Publish strategy

Include Page
Publish Strategy
Publish Strategy

Passive modules without polling and timeout

These modules are not polling and are also not waiting up to a timeout time. They just listen and forward a result, when present.

DA moduledescription
trapdSNMP trap daemon
gps_tcp_clientlisten to GPS NMEA packet received from a TCP connection
gps_serial_clientlisten to GPS NMEA packet received from a serial port



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The ap_scanner is a data acquisition module which scans Wireless Access Points on the neighborhood.

interval

Mandatory parameter which defines the interval in milliseconds between each scan.

unitminmaxdefault

milliseconds

1000 msundefined

undefined

timeout

Mandatory parameter which defines the maximum amount of time that the scan is allowed to run, in milliseconds.

unitminmaxdefault

milliseconds

1000 msundefinedundefined

...

The sensor rest_temperatures_sensor/cooler has no specific upload strategy in its configuration, so it uses the default upload strategy interval which is set to 60 seconds (see the Example snippet of the SiteController.cfg above). Herewith the sensor data are present in the cloud with a difference in their timestamps of  60 seconds.

Info

In both cases additional values are uploaded to cloud, if there is a change in the value.