Trigger to start an app

Hello Community !

I can’t find a solution to my problem, let me explain.

As part of my work, I am developing a Tulip application to guide my operators. Each operator is at a workstation, and as soon as a tray (equipped with an RFID chip) arrives at their station, the RFID reader detects it and sends the associated information.

I am using a Schneider PLC as an RFID reader, so I chose to connect it to Tulip using Node-Red. I have managed to write and read data from Node-Red to Tulip. However, I don’t know how to make the Tulip application launch as soon as the tray arrives (at least the correct step of my application).

Do you have any ideas on what I could do? Is there a way for a trigger to launch as soon as a variable in an array changes? Should I use a loop function to check the status of my value (I think this will require a lot of computing power…)?

Thank you for your help,


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I would look into

Have your node red flow use this API

Have a trigger in your app based on the data you send.

I don’t understand how i can solve my problem with this two articles … Can you explain me what you were thinking of ?

thank you,


You want to have an app that can advance based on an external event.

You can trigger such things by sending data into tulip with the API as a machine event.

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Ok I understand ! Very clever, Thank you very much !