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Harsch-Systems / node-red-contrib-pi-plates

Control Pi-Plates from Node-RED
Apache License 2.0
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Event or poll DIGIplate #34

Open Josov opened 1 year ago

Josov commented 1 year ago

I would like to use DIGIplate and Node-RED in a project and I have a question regarding the supporting node node-red-contrib-pi-plates. Does the change of an digital input result in a new message from the node or do I need to poll for input changes?

Thank you in advance for your help.

pi-plates commented 1 year ago

To the best of my knowledge, Node-RED does not support inputs generated by events. So yes, you will need to poll for changes.

Josov commented 1 year ago

Dear WallyWare,

Thank you for your quick reply. I think there is not a theoretical reason why Node-RED should not support it. I think it would be so much better that you don’t need to poll in your application. In the application I need to respond to limit switches and user buttons. Polling could cause trouble when missing an event.

Kind regards,

Met vriendelijke groeten,

Jos Oude Vrielink

Borggravevijversstraat 40

3500 Hasselt, België

Mobiel: +32 499 71.79.91

Van: WallyWare @.> Verzonden: dinsdag 23 mei 2023 13:19 Aan: Harsch-Systems/node-red-contrib-pi-plates @.> CC: Josov @.>; Author @.> Onderwerp: Re: [Harsch-Systems/node-red-contrib-pi-plates] Event or poll DIGIplate (Issue #34)

To the best of my knowledge, Node-RED does not support inputs generated by events. So yes, you will need to poll for changes.

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