Collector SiteManager Internal

Updated on 09 Dec 2022
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The purpose of this article is to serve as a reference for the Internal Collector part of the full Data Collection Module documentation.

Prerequisites

A Starter package (SiteManager + accounts)

Data that you can collect from SiteManager itself includes:

Values from SiteManager-board:
"SystemTemperature" (in centigrade/Celcius)
"CPULoad" (in percent)
"FreeMem" (in kB) 
"UTCRTC" UTC Real Time Clock, broken into 8 separate values
"DigitalInput" (as 0/1)
"IngressRate" (in bytes/s)
"EgressRate" (in bytes/s)
"DBCachesize" (in bytes)
"DBSize" (in bytes)

Values from mobile modem, if connected or SiteManager is XX39 model:
"GSMRssi" (in dBm)
"GSMBer" (in percent)
"GSMOperator" (text string)
"GSMTechnology" (text string: "4G", "3G", "GPRS" etc.).

Values from USB GPS unit if connected :
 "GNSSLatitude" (double in decimal degrees, positive for North, negative for South of Equator).
 "GNSSAltitude" (double in meters MSL).
 "GNSSSatellitesInView" (integer)
 "GNSSSatellitesUsed" (integer)
 "GNSSGeographicDistance" (double in meters).

Config main

The Config main (array of objects, mandatory) contain the following fields:

Function	Type	Importance	Description
ConfigName	string	mandatory	Unique name for this configuration file. Follows the rules for names.
ConfigDescription	string	optional	text describing this configuration.
CheckpointInterval	integer == 0 or >= 60	optional	The interval with which all data from the internal datasample cache is saved to disk. This more unstable (power) the SiteManager, the more often data should be saved. Saving it often, however will also cost performance and wear on the hard-disk/flash. A value of 0 means, never checkpoint, otherwise it means interval in seconds between saves. If not specified the value 15 * 60 (15 minutes) is used.
AlarmsSaved	integer >= 4	optional	The number of alarms saved in the store-and-forward database. If this values is not specified, it will default to 32.
WaitForNTP	boolean	optional	Synchronize DCM data collection with NTP time. If this parameter is true, all DCM collectors will not begin collecting data until NTP is enabled and configured and NTP has synchronized date/time. If not specified, the value is true.

Since the JSON format itself doesn't define a comment notation, DCM accepts a fieldname comment with any type of value in any section.

Example of comment

"Comment": "Example of a comment for use in any section.":

The Collectors (array of objects, mandatory) list of elements contains the following fields:

Function	Type	Importance	Description
CollectorName	string	mandatory	Unique name (within this configuration file) of a device to collect data from. (This is the name used in the agent configuration). Follows the normal rules for names.
CollectorDescription	string	optional	Description of this collector.
CollectorIPAddr	string	optional	Provides a default IP address (or DNS name) for the device to be polled. The agent Target IP address will take precedence over this.
CollectorPortno	integer > 0 and < 65535	optional	Provides the default port number for the device to be polled. The agent Target Port number will take precedence over this. If neither CollectorPortno, nor agent Target Port Number is specified, the appropriate port to be used will be determined by the Protocol parameter value.
Alias	string	optional	This is the CollectorName of another collector, from which, all the parameters (except CollectorName, CollectorDescription, CollectorIPAddr and CollectorPortno) are copied from. An alias cannot refer to another alias.
Protocol	string-enum	mandatory	The protocol used to collected data. Currently, 7 possible values exists: "OPC-UA/TCP", "Modbus/TCP", "S7/TCP", "Http/GET", "Rockwell", "Simulator" and "Internal".
ConnectRetryMin	integer > 0	mandatory	Minimum number of seconds before trying to reestablish a connection to the device being sampled. An exponential back-off algorithm is used to retry the establishment of a connection, starting after ConnectRetryMin and increasing to ConnectRetryMax.
ConnectRetryMax	integer > 0	mandatory	Maximum number of seconds before trying to reestablish a connection to the device being sampled.
SamplePoints	Array of objects	mandatory	List of samples to be collected, potentially aggregated and stored in the Store'n'Forward database.

Samplepoint items

The SamplePoints objects contains the following elements:

Function	Type	Importance	Description
SampleName	string	mandatory	Name of this sampled value (sometimes called a tagname). Follows the normal rules for names.
SampleDescription	string	optional	A text description of this sample value.
SampleUnit	string	optional	A description of the unit of measurement for this sample.
SampleGroup	string	optional	Designates (in some datasrvs) that all sample points in the group in question should be handled (displayed) together. The DCM system itself places no significance on this group affiliation.
SamplesSaved	integer > 0	optional	The number of values collected that is saved in the Store'n'Forward database even after the values have been sent to all dataservers. When 0 is specified, the value can be used in aggregators. but nothing is sent via dataservers to cloud system. If left unspecified, values are only saved in the Store'n'Forward database until they have been delivered to all dataservers.
OnlySaveOnChanged	bool	optional	Checks whether new sample values should only be saved to the Store'n'Forward database if the values have changed since the last sample. If not set, it is false.
SampleDataType	string-enum	mandatory	The type of data collected. The possible values include: "bool" (1 bit), "sbyte" (8 bit signed), "byte" (8 bit unsigned), "int16" (16 bit signed), "uint16" (16 bit unsigned), "int32" (32 signed), "uint32" (32 bit unsigned), "int64" (64 bit signed), "uint64" (64 bit unsigned), "float" (32 bit), "double" (64 bit), "string" (variable text up to 24575 bytes includes terminating NUL), "data" (variable data up to 24575 bytes).
SampleMaxVDataSize	integer > 0 and <= 24575	optional	The max size of variable data enforced for this sample. This is only relevant for SampleDataType "string" or "data". If not specified, the value is 1024.
SampleLowerLimit	integer/double	optional	The lower limit for the collected data. If the collected data value is less than SampleLowerLimit, it is evaluated in accordance with SampleLimitDiscard and SampleLimitAlarm.
SampleUpperLimit	integer/double	optional	The upper limit for the collected data. If the collected data value is more than SampleUpperLimit, it is evaluated in accordance with SampleLimitDiscard and SampleLimitAlarm.
SampleLimitDiscard	bool	maybe-optional	Checks whether a sample limit violation results in the sample value being discarded. Mandatory if either SampleLowerLimit or SampleUpperLimit is present.
SampleLimitAlarm	bool	maybe-optional	Checks whether a sample limit violation generates an alarm. Mandatory if either SampleLowerLimit or SampleUpperLimit is present.
InternalData	Object	maybe-optional	Description of the internal behaviour of this sample point. Mandatory if the protocol type is "Internal".

InternalData

The InternalData object contains the following elements:

Function	Type	Importance	Description
InternalFunction	string-enum	mandatory	This is the internal function to be performed. The values currently permitted include: "SystemTemperature" (in centigrade Celsius) "CPULoad" (in percent) "FreeMem" (in kB) "UTCRTC" UTC Real TIme Clock broken into 8 separate values. Controlled by InternalIndex. "DigitalInput" (as 0/1). Controlled by InternalIndex. "IngressRate" (in bytes/s). Controlled by InternalFieldname. "EgressRate" (in bytes/s). Controlled by InternalFieldname. "DBCachesize" (in bytes) "DBSize" (in bytes) "GSMRssi" (in dBm) "GSMBer" (in percent) "GSMOperator" (text string) "GSMTechnology" (text string: "4G", "3G", "GPRS" etc.) "GNSSLatitude" (double in decimal degrees, positive for North, negative for South of Equator). Note: The ChangeLimit value for this value is compared to the "GNSSGeographicDistance" value, not the value of the "GNSSLatitude". Also note, that if only OnlySaveOnChanged is set, the ChangeLimit is set to the estimated precision reported by the GNSS chipset. "GNSSLongitude" (double in decimal degrees, positive for East, negative for West of Greenwich). Note: The ChangeLimit value for this value is compared to the "GNSSGeographicDistance" value, not the value of the "GNSSLongitude". Also note, that if only OnlySaveOnChanged is set, the ChangeLimit is set to the estimated precision reported by the GNSS chipset. "GNSSAltitude" (double in meters MSL). Note: If only OnlySaveOnChanged is set, the ChangeLimit is set to the estimated precision reported by the GNSS chipset. "GNSSSatellitesInView" (integer) "GNSSSatellitesUsed" (integer) "GNSSGeographicDistance" (double in meters). The Havesine geographical distance since the last GNSS position was reported.
InternalIndex	integer >= 0	maybe-optional	If InternalFunction is "DigitalInput" this is the mandatory index of the Digital I/O input port from which values are to be collected. If InternalFunction is "UTCRTC" this is the mandatory index of the time: 0 - second (0-59), 1 - minute (0-59), 2 - hour (0-23), 3 - day of the month (1-31), 4 - month (0-11, January = 0), 5 - Year (-1900), 6 - day of the week (0-6, Sunday = 0), 7 - day of the year (0-365, 1. Jan = 0).
InternalFieldname	string	optional	Used when the InternalFunction is "IngressRate" as a nameref for the sample for which to show the ingress rate or when the InternalFunction is "EgressRate" as the name of a Dataserver to show the egress rate for. If not specified, the rate is the total ingress or egress rate.
InternalSampleInterval	integer >= 0	mandatory	The number of seconds between each sample of this Internal object. If the interval is 0, only event-driven polling is used.

Example:

{
  "CollectorDescription": "SDCM Internal Values Server",
  "CollectorName": "demointernal",
  "Protocol": "Internal",
  "SamplePoints": [
    {
      "SampleDataType": "double",
      "SampleDescription": "CPU load",
      "SampleLimitAlarm": false,
      "SampleLimitDiscard": false,
      "SampleLowerLimit": -1000,
      "SampleName": "CPU",
      "SampleUpperLimit": 1000,
      "SamplesSaved": 3000000,
      "InternalData": {
        "InternalFunction": "CPULoad",
        "InternalSampleInterval": 1
      }
    },
    {
      "SampleDataType": "double",
      "SampleDescription": "FreeMem",
      "SampleLimitAlarm": false,
      "SampleLimitDiscard": false,
      "SampleLowerLimit": -1000,
      "SampleName": "FreeMemory",
      "SampleUpperLimit": 1000,
      "SamplesSaved": 3000000,
      "InternalData": {
        "InternalFunction": "FreeMem",
        "InternalSampleInterval": 1
      }
    },
    {
      "SampleDataType": "double",
      "SampleDescription": "SystemTemperature",
      "SampleLimitAlarm": false,
      "SampleLimitDiscard": false,
      "SampleLowerLimit": -1000,
      "SampleName": "SystemTemperature",
      "SampleUpperLimit": 1000,
      "SamplesSaved": 3000000,
      "InternalData": {
        "InternalFunction": "SystemTemperature",
        "InternalSampleInterval": 1
      }
    }
  ]
}

See a complete list of internal collector examples in the "Related articles" section below.

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What's Next

Collector Simulated data

Table of contents

Prerequisites
Config main
Samplepoint items
InternalData