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    node-red-contrib-bool-gate

    1.0.2 • Public • Published

    node-red-contrib-bool-gate npm version npm downloads Unlicense

    Node RED node to include boolean logic gates.

    Installation

    $ npm install node-red-contrib-bool-gate

    Restart Node-RED and use the node!

    Or from the Node-RED's palette, search for "node-red-contrib-bool-gate".

    Check example at "Import > Examples > boolean logic"

    Boolean condition

    If you know how the boolean logic work, you can skip this section.

    The boolean logic is a way to determine a condition regarding to the input.

    Condition A Condition B AND NAND OR NOR XOR XNOR
    false
    false
    false
    true
    false
    true
    false
    true
    false
    true
    false
    true
    true
    false
    true
    false
    true
    false
    false
    true
    true
    false
    true
    false
    true
    true
    true
    true
    true
    false
    false
    true

    You can do it to for more than 2 condition :

    Condition A Condition B Condition C AND NAND OR NOR XOR XNOR
    false
    false
    false
    false
    true
    false
    true
    false
    true
    false
    false
    true
    false
    true
    true
    false
    true
    false
    false
    true
    false
    false
    true
    true
    false
    true
    false
    false
    true
    true
    false
    true
    true
    false
    false
    true
    true
    false
    false
    false
    true
    true
    false
    true
    false
    true
    false
    true
    false
    true
    true
    false
    false
    true
    true
    true
    false
    false
    true
    true
    false
    false
    true
    true
    true
    true
    true
    false
    true
    false
    false
    true

    You can follow this link to learn more about the boolean logic.

    Usage

    Notion of Rules

    A rule can be read from top, like :

    <TOPIC><PROPERTY><CONDITION><VALUE>

    with topic, the topic of incomming message (if needed), property to perform the test, condition the condition you want for the property and value the value you want for the property (if needed).

    You can pick property from everywhere :

    • from the incomming message
    • from the flow context
    • from the global context

    The following condition are implemented :

    • ==
    • !=
    • <
    • <=
    • >
    • >=
    • is between
    • contains
    • match regex
    • is true
    • is false
    • is null
    • is not null

    You can pick value from the following type (depending on your condition) :

    • number
    • string
    • message's property
    • flow's property
    • global's property
    • regex
    • previous value

    Configuration

    Please take you time to create your gate, by following these steps :

    • Select the type of gate you want for your node (between AND and NAND for the and-gate and OR, NOR, XOR and XNOR for the or-gate)
    • Tick the "True restriction" checkbox if you want to have output only when the gate is at true state.
    • Fill if needed the "Input message topic" input to filter your incomming message
    • Select the property you need to check (Default : msg, assuming you defined the input message topic)
    • Select the condition(Defautl : =)
    • Type the value you want for your property, assuming you picked up the correct type
    • Add a rule by cliking on + add below the list, and repeat the procedure

    See the node information for more details

    Install

    npm i node-red-contrib-bool-gate

    DownloadsWeekly Downloads

    1,180

    Version

    1.0.2

    License

    none

    Last publish

    Collaborators

    • truc