Reference of functions and parameters of the virtual sensor

|=Function or reserved parameter|=Description

|if(<condition>, <then>, <else>)|if statement. When the condition specified by the logical expression <condition> is met, the <then> operator is executed, otherwise - <else>

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|time|Date and time (UTC)

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|t|Time (UTC) in seconds

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|date|Date (UTC)

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|cdate(<time>, <time format>)|The function of converting the time of the package recording (the date is converted from a textual representation to a date and time structure type); used when comparing dates and times. The <time format> parameter is case sensitive. Examples. if(date > cdate('2019-01-04', 'yyyy-MM-dd'), 1, 0) if(time > cdate('2019-01-04 05:30:00', 'yyyy-MM -dd HH:mm:ss'), 1, 0)

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|()|Grouping Operators

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|*, /, %|Operators for multiplication, division, getting the remainder of a division

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|+, -|Addition Operators

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|=, ==, ~!=,|Comparison Operators

|&&, and|logical AND

|II, or|Logical OR

|!, not|Logical NOT

|Abs(х)|Returns the absolute value of the number x

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|Acos(х)|Returns the angle whose cosine is x

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|Asin(х)|Returns the angle whose sine is x

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|Atan(х)|Returns the angle whose tangent is x

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|Ceiling(х)|Round up to whole number

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|Cos(х)|Returns the cosine of angle x

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|exp(х)|Returns the number e raised to the x power

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|Floor(х)|Rounding down to the nearest integer

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|getbit(x,y)|Returns the y-th bit of x

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|IEEERemainder(x,y)|Remainder of x divided by y: The number equal to x - (y Q), where Q is the quotient of x / y rounded to the nearest integer (if x / y is equidistant from two integers, an even number is chosen). If x - ( y Q) is zero, +0 is returned if x is positive, or -0 if x is negative.

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|log(x,y)|Logarithm of number x to base y

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|Log10(х)|Decimal logarithm of x

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|max(x,y)|Returns the greater of two specified numbers

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|min(x,y)|Returns the smaller of two specified numbers

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|Pow(x,y)|Raising a number x to the power y

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|Round(x,y)|Rounds the decimal value x to the specified number of decimal places y; values in the middle are rounded up to the nearest even number.

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|Sign(х)|Returns an integer indicating the sign of the number x

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|Sin(х)|Returns the sine of angle x

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|sqrt(х)|Returns the square root of x

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|Tan(х)|Returns the tangent of x

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|lat|Returns the latitude value

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|lon|Returns the longitude value

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|speed|Returns the value of the "Speed" parameter

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|sats|(((

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Returns the number of GPS satellites

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)))

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|glonass|Returns the number of GLONASS satellites

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|sats+glonass|(((

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Returns the number of all satellites

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)))

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|prev(option)|Calculates the value of an expression for the previous message in a set

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|unix(option)|Converts the result of an expression whose type must be a timestamp to Unix time

=== ===

=== Bitwise parameter control ===

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The GLONASSSoft monitoring platform provides bit-by-bit parameter control, which implies the ability to control not the entire parameter as a whole, but a specific bit.

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This is convenient if the device displays a lot of various data through one parameter: for example, the first bit displays the alarm status (on / off), the second - the driver's door status (open / closed), the third - the state of the headlights, etc. Thus, with the help of bit-by-bit parameter control, it is possible to create several different sensors based on one parameter, for example, with respect to UMK-3xx terminals, it is possible to control the ninth or fifteenth bit of the STATUS parameter (GNSS jamming detector or on/off PTT, respectively).

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To do this, you need to create a virtual sensor with a link in the getbit(x,y) formula, where: x - a link to the sensor from whose parameter you want to get a bit; y - serial number of the desired bit, numbering starts from 0, where 0 is the least significant bit. The result of the function is the value of the bit with the number "y" (0 or 1).

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For example, for UMKa3xx terminals, the STATUS field is displayed in decimal form at the input *A(100), GNSS signal suppression is the ninth bit.

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~1. Create a virtual sensor with the expression getbit(adc100,9).

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[[image:image-20221007112742-1.jpeg]]

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As a result, we will be able to observe the fact of GNSS jamming.