node-red-contrib-logic-combiner

Node-RED Logic Combiner - combines multiple boolean inputs with individual AND/OR operators per input.

Features

• AND / OR operator configurable per topic
• Up to 99 topics
• Inversion per topic (NOT)
• Truthy/Falsy evaluation
• Min. topics before first output
• Optional initial value

Behavior

• Each input is identified by msg.topic
• Per topic configurable: Operator (AND/OR), Label, Inversion
• Calculation is performed sequentially in the configured order
• Output as soon as minTopics is reached

Example

Complex logic: (Pump AND NOT Fault) OR Bypass

Input 1 (Pump)         = true  → Start
Input 2 (Fault)   AND  = false → NOT → true
Input 3 (Bypass)  OR   = true
─────────────────────────────────────────────
Calculation: (true AND true) OR true = true

Configuration

| Property | Description | Default | |----------|-------------|---------| | Min. Topics | Number of topics before first output | all | | Initial Value | Initial value for topics | none | | Topics | List with: Operator (AND/OR), Topic, Label, NOT | - |

Topic Configuration

Each topic has the following properties:

• Operator (AND/OR): Combination with the previous result (first topic = Start)
• Topic: The msg.topic value for identification
• Label: Descriptive name (optional)
• NOT: Inverts the value before combination

Input

• msg.payload - Any value (truthy/falsy)
• msg.topic - Required - Must match a configured topic

Truthy/Falsy

Falsy (= false): false, 0, "", null, undefined, NaN, "false", "0", "off"

Truthy (= true): Everything else: true, 1, "on", etc.

Runtime Override

| Property | Description | |----------|-------------| | msg.reset | true = reset all values |

Output

{ "payload": true }

Use Cases

| Application | Configuration | |-------------|---------------| | Safety circuit | EmergencyStop AND Door AND Release | | Alarm system | Sensor1 OR Sensor2 OR Sensor3 | | Ready state | Pump AND (NOT Fault) | | Complex | (Pump AND NOT Fault) OR Bypass |

Node Status

• → true (3/3) - Result active
• → false (3/3) - Result inactive
• Waiting (1/3 Topics) - Not enough data yet

Author

sr.rpo

License

MIT