node-red-contrib-traffic 0.2.1

A traffic light node

npm install node-red-contrib-traffic

"Traffic light" like node for node-red. It sends or it drops messages according to its state, controlled by messages.

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npm install node-red-contrib-traffic


This nodes accepts a msg and sends it according to its internal state. Its state may be passing or blocking

If in passing mode, a green circle is shown under the node and any incoming message is allowed and be sent If in blocking mode, a red circle is shown under the node and any incoming message is dropped.

The passing mode is set by sending a message which fit the configuration based on a property name and a regex. The blocking mode is also set by configuration

It's possible to let the control messages pass by checking the right checkbox

I's also possible to configure the node in passing mode or blocking at startup

Example flow files

Try pasting in the flow file below that shows the node behaviour

[{"id":"a724df44.58db2","type":"comment","z":"8d67b3ee.72985","name":"STOP configuration","info":"STOP message is configured to be also sent to the COP","x":226,"y":259,"wires":[]},{"id":"67d26698.982d98","type":"traffic","z":"8d67b3ee.72985","name":"Traffic sample","property_allow":"payload","filter_allow":"GO","ignore_case_allow":false,"send_allow":false,"property_stop":"payload","filter_stop":"stop","ignore_case_stop":true,"send_stop":true,"default_start":false,"x":362.5,"y":145,"wires":[["9513a40c.6aec58"]]},{"id":"16fff6d4.e90009","type":"inject","z":"8d67b3ee.72985","name":"","topic":"I'm a car","payload":"Cheers !","payloadType":"str","repeat":"2","crontab":"","once":true,"x":147.5,"y":141,"wires":[["67d26698.982d98"]]},{"id":"b822b6d3.47dd48","type":"inject","z":"8d67b3ee.72985","name":"GO","topic":"","payload":"GO","payloadType":"str","repeat":"","crontab":"","once":false,"x":117.5,"y":197,"wires":[["67d26698.982d98"]]},{"id":"70ef37c7.8f10c8","type":"inject","z":"8d67b3ee.72985","name":"","topic":"","payload":"STOP","payloadType":"str","repeat":"","crontab":"","once":false,"x":117.5,"y":238,"wires":[["67d26698.982d98"]]},{"id":"9513a40c.6aec58","type":"debug","z":"8d67b3ee.72985","name":"COP","active":true,"console":"false","complete":"payload","x":530.5,"y":186,"wires":[]},{"id":"1f216cdb.e0de93","type":"comment","z":"8d67b3ee.72985","name":"Traffic Light sample","info":"","x":187.5,"y":68,"wires":[]}]

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  • Jacques W


This code is Open Source under an Apache 2 License.

You may not use this code except in compliance with the License. You may obtain an original copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Please see the License for the specific language governing permissions and limitations under the License.

Feedback and Support

Please report any issues or suggestions via the Github Issues list for this repository.

For more information, feedback, or community support see the Node-Red Google groups forum at!forum/node-red

Node Info

Version: 0.2.1
Updated 11 months ago
License: Apache-2.0


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