Device Management
      Back to home
      1. Help Center
      2. FAI Pro (Cloud Deployment)
      3. Device Management

      Overview of Technical Streams

      A technical stream is a stream that is sent with every new device or when a template is applied to the device.

      A technical stream is a stream that is sent with every new device or when a template is applied to the device. Alternatively, you can create technical streams after the device is operational, without applying a new template. A technical stream provides information about the device itself so that you can easily monitor its health.  

      Technical streams that are included with a new device include GSM, GPS, Battery, Humidity, and Communication Status. Additional technical streams are listed in the STREAM MANAGEMENT table in the Configuration tab for the device.  

       

      Watch this 2-minute video that gives an overview of the various types of technical streams and how to add them to your device.

       

      The following table lists the technical stream types that may be associated with a device. 

      Type 

      Stream Name 

      Description and Range of Values

      GSM Signal Strength ,

      Cellular Signal Strength

      GSM* 

      The strength of the modem signal to transmit to the cellular network.  

      The closer the number is to 0, the stronger the signal strength. 

      GSM Signal Range of Values:

      • Excellent:          > -64 dBm
      • Good: Between   -79 and -65 dBm
      • Fair: Between      -89 and -80 dBm
      • Weak: Between   -99 and -90 dBm
      • Very Weak:     <= -100 dBm
      Tip: Ignore the value if it is +85. This is a known problem in 4G data networks. 

      GSM Signal Strength % 

       

      The quality of the modem signal expressed as a percentage. The signal strength is converted from dBm to the  range 0 - 100, where 0 is the weakest signal strength and 100 is the strongest strength. 

      GSM Signal Strength % Range of Values:

      • Excellent: 75-100% 

      • Good:        55-75%

      • Moderate: 45-55% 

      • Poor:            0-45%

      GSM RSRP,

      Cellular RSRP 

       

      Reference Signal Received Power - the modem signal’s strength (not quality). 

      GSM RSRP Range of Values:

      • Excellent:                 >=  -80 dBm  

      • Good:                               -80 dBm to -90 dBm  

      • Midway to LTE cell:     -90 to –100 dBm 

      • Edge of LTE cell:  <=   -100 dBm 


      This channel is used for 2G, 3G and 4G networks: 

      • In 2G and 3G, values are stored relative to CSQ: 0 = 0%, 31 = 100%. 

      • In 4G, values are stored relative to RSRP: -140dBm = 0%, -44dBM = 100%. 

      • In 4G, RSRP and RSRQ parameters are stored in channels 2 and 3 respectively. 

      GSM RSRQ,

      Cellular RSRQ

       

       

      Reference Signal Received Quality  - the modem signal’s quality.

      GSM RSRQ Range of Values:

      • Excellent:             >=  -10 dBm
      • Good:                            -10 dBm to -15 dBm
      • Midway to LTE cell:  -15 dBm to –20 dBm
      • Edge of LTE cell: <= -20 dBm

      GPS 

      GPS* 

      (Not included in Wavelet 4R™)

      Global Positioning System that provides geolocation and time information to the device. Includes the following values:

      • Latitude:  x 107 in degrees,  + is North, - is South. Divide the value by 10,000,000.0 to get true value.  

      • Longitude:  x 107 in degrees,  + is East, - is West. Divide the value by 10,000,000.0 to get true value.   

      • Altitude:  x 102 in meters, from MSL (mean sea level). Divide the value by 100.0 to get true value.  

      • HDOP (horizontal dilution of precision):  x 5 in HDOP units. Divide the value by 5 to get true value.  

      GPS is updated after a reboot, after the magnetic key is swiped in front of the device, when the device comes out of hibernation, and monthly. 

      Battery Consumption 

      Battery Life

      How much of the battery, in percent, remains based on the amount of energy that was used for each transmission and sample. Battery Life is calculated, not measured. The battery itself is not tested to see how much is left. Rather, a rough calculation is made that is based on time, usage, transmissions, and other parameters.

      When the battery life is 30%, replace the battery (includes resetting the battery life). 

      Warning: Do not let the battery level go down to 1%, otherwise transmissions will fail. 

      Communication Status 

      Communication Status* 

      Communication Status Values:

      The Communication Status stream shows the status of the device: 

      Status Code

      Status

      Name

      Status Description

      2

      Normal

      		  

      3

      Resumed

      The device was not in Normal status, but now it has resumed. The next time the device transmits, the device will be in Normal status.  

      4

      Delayed

      Defined according to the Reporting Profile that the user selects for every device.

      5

      Interrupted

      Defined according to the Reporting Profile that the user selects for every device.

      6

      Hibernating

      The device is in Hibernation mode.  

       

      To see the device’s Reporting Profile: 

      1. Select the device in the Sites pane, and then click Actions below the picture of the device.  

      2. Select Set Reporting Profile. The device’s profile is displayed with the definition of Delayed and Interrupted according to that profile. 

         

        Example: 

        Suppose that the Reporting Profile is defined as Default. 

         

        Note: The device does not go to Delayed mode if it does not transmit for 2 hours, but rather only if it does not transmit for 2 hours after its defined  Transmission Interval. 

        So, if the Transmission Interval is set for every 12 hours, then the Communication Status will be set to Delayed if the device did not transmit for 14 hours. The Status will be set to Interrupted if the device did not transmit for 3 ½ days. 

         
        Note:  Ignore data in the Samples tab of this stream.

        Internal Battery Voltage 

         

        The voltage that the battery is producing at the moment.

        External Power Voltage 

        Bat. Ext. 

        The voltage provided by the external power, if available.

        VBAT (Voltage at Battery)

         

        The amount of battery (or external power) that was used during the last data sampling and transmission. This information is used to determine how much battery remains (Battery Consumption).

        Internal Battery % 

        Battery Life* 

        The calculation based on how much current is consumed for device tasks such as operating the internal cellular modem, or powering up and sampling a sensor.

        The value is deducted from the total amount of potential current available when the battery is new. The remaining amount of current is calculated as a percentage, and is displayed as Battery Life (remaining).

        If the battery is disconnected from the device, then the last value is what is displayed in the Battery Life stream. Since there is no longer any battery consumption, the percentage remains as is (as long as the external power source provides power to the device and the battery is disconnected).

        Acceptable: 40% or higher 

        If a technical alert for Internal Battery was added, the default is 20%.

        Power Source

        		 External Power Voltage

        Monitors when the power source changes from the internal battery to an external source, or vice versa. 

        You can send an alert at the next normally scheduled transmission or immediately when the power source changes.

        Internal Temperature 

        W_Temperature 

        The internal temperature of the physical device. 

        Acceptable range: -40°C to 80°C. 

        Internal Humidity 

        Internal Humidity* 

        (Not included in Wavelet Ex™ and Wavelet 4Rdevices)

        The amount of moisture that has penetrated the physical device. Two desiccants absorb the moisture. 

        Preferred range: < 30%. 

        Acceptable range: Up to 70%

         

        If the humidity is a small negative value (for example, -1, -2, -3%), it means that the humidity is 0%. 

        When the rate hits 70%, change the desiccants (contact support@ayyeka.com to order more).

        An abrupt increase typically means that water has entered the device.

        If a technical alert for Internal Humidity was added, the default is 80%.

        *Included automatically with every new device.