Operation¶

The Operation node parses the measurment point or attribute from the input msg according to the selected message type, performs low-code logic and math operations, and passes it to the downstream node as output msg.

Node Type¶

Transformation.

Input and Output Ability¶

This node has multiple entry points and 1 exit point. Both the input and output are JSON.

Node Properties¶

Name

The name for this node.

Message Type

The message type, either Post Measurement Point or Post Attribute, to perform the operation on.

Model

The model of the message type. You can select only 1 model.

Input Point

The measurement points or attributes (in), depending on the Message Type selected, of the model selected above which are used together with the Operator under Expression below for calculation (out). You can select multiple input points.

Output Point

The measurement point or attribute, depending on the Message Type selected, of the model selected above which is used to store the calculated result in Expression. The result will overwrite its existing value. You can only select 1 output point.

Expression

The calculation expression for the output. Click the operator and input points to build the expression.

out refers to the calculated result that will be stored in Output Point.
in referes to the input point.

Operators¶
Operator	Formula	Example	Remarks
Abs	out = abs(in1)	in1 = -9 out = 9	Returns the absolute value of the number. in1 = Numeric out = Numeric
Avg	out = (in1 + in2) / 2	in1 = 7, in2 = 8.7 out = 7.85	Returns the average of 2 numbers. in1 and in2 = Numeric out = Numeric
Max	out = max(in1, in2)	in1 = 3, in2 = 6 out = 6	Returns the higher value of the two. in1 and in2 = Numeric out = Numeric
Min	out = min(in1, in2)	in1 = 3, in2 = 6 out = 3	Returns the lower value of the two. in1 and in2 = Numeric out = Numeric
Exp	out = exp(in1)	in1 = 6 out = 403.4287934927351	Returns the exponential function with base e. in1 = Numeric out = Numeric
Modulus	out = (in1 % in2)	in1 = 22, in2 = 3 out = 1	Returns the remainder after dividing. in1 and in2 = Numeric out = Numeric
Power	out = pow(in1, in2)	in1 = 3, in2 = 5 out = 243	Returns the power (in2) of a number (in1). in1 and in2 = Numeric out = Numeric
SquareRoot	out = sqrt(in1)	in1 = 64 out = 8	Returns the squareroot of the number. in1 = Numeric out = Numeric
And	out = (in1 && in2)	in1 = 0, in2 = 0 out = 0 in1 = 0, in2 = 1 out = 0 in1 = 1, in2 = 1 out = 1 in1 = 1, in2 = 0 out = 0	Returns true only if both values are true. in1 and in2 = Boolean out = Boolean
Or	out = (in1 \|\| in2)	in1 = 0, in2 = 0 out = 0 in1 = 0, in2 = 1 out = 1 in1 = 1, in2 = 1 out = 1 in1 = 1, in2 = 0 out = 1	Returns true if one of the values is true. in1 and in2 = Boolean out = Boolean
Not	out = (!in1)	in1 = 0 out = 1 in1 = 1 out = 0	Returns the reverse value. in1 = Boolean out = Boolean
Equal	out = (in1 == in2)	in1 = 0, in2 = 0 out = 1 in1 = 0, in2 = 1.1 out = 0 in1 = 1.1, in2 = 1.1000008 out = 0	Returns true if both values are the same. in1 and in2 = Numeric out = Boolean
Greater Than	out = (in1 > in2)	in1 = 1, in2 = 0 out = 1 in1 = 1, in2 = 1 out = 0 in1 = 0, in2 = 1 out = 0	Returns true if in1 is greater than in2. in1 and in2 = Numeric out = Boolean
Greater Than Equal	out = (in1 >= in2)	in1 = 1, in2 = 0 out = 1 in1 = 1, in2 = 1 out = 1 in1 = 0, in2 = 1 out = 0	Returns true if in1 is greater than or equals to in2. in1 and in2 = Numeric out = Boolean
Less Than	out = (in1 < in2)	in1 = 0, in2 = 1 out = 1 in1 = 1, in2 = 0 out = 0 in1 = 1, in2 = 1 out = 0	Returns true if in1 is less than in2. in1 and in2 = Numeric out = Boolean
Less Than Equal	out = (in1 <= in2)	in1 = 0, in2 = 1 out = 1 in1 = 1, in2 = 0 out = 0 in1 = 1, in2 = 1 out = 1	Returns true if in1 is less than or equals to in2. in1 and in2 = Numeric out = Boolean
Log10	out = lg(in1)	in1 = 35 out = 1.5440680443502757	Returns the base 10 logarithm of the number. in1 = Numeric out = Numeric
LogE	out = ln(in1)	in1 = 22 out = 3.091042453358316	Returns the natural logarithm of the number. in1 = Numeric out = Numeric

Click the Test button to test your expression by entering the expression to see if it works as designed.

Description

The description for this node.

Limitations¶

Only supports numeric and boolean values.

Samples¶

The samples below are based on the following data.

Input Point: attribute1, attribute2
Output Point: attr_int
Expression: pow(msg.attribute1, msg.attribute2)

Input Sample¶

{
  "MetaData": {
    "messageType": "PostAttribute",
    "assetId": "assetId",
    "deviceKey": "deviceKey",
    "productKey": "productKey",
    "orgId": "yourOrgId"
  },
  "Body": {
    "attribute1": 3,
    "attribute2": 5,
    "attr_int": 3
  }
}

Output Sample¶

{
  "MetaData": {
    "messageType": "PostAttribute",
    "assetId": "assetId",
    "deviceKey": "deviceKey",
    "productKey": "productKey",
    "orgId": "yourOrgId"
  },
  "Body": {
    "attribute1": 3,
    "attribute2": 5,
    "attr_int": 243
  }
}