Modify node-arduino to create a msg on every received analog value

General
1

I'm using analog inputs on my Arduino running the StandardFirmataPlus example sketch to measure pressure sensors. I've modified the sketch to read the analog inputs only every 5 seconds to reduce USB serial traffic and cpu load on both devices but node-arduino does not create a msg and trigger my flow unless the new value is different than the previous one. I want to have a that value saved to a time series db regardless of whether the value has changed.

The two options I prefer are:

  1. Modify the node and remove the comparison.
    I don't know how to do that yet.

  2. Request a feature for node-red-node-arduino to pass msgs even if the value has not changed
    (maybe also request support for setting the analog sampling rate from within the node, contrib-gpio supports this but doesn't support INPUT_PULLUP)
    This could take longer so I like the first option for the interim.

Any other reasonable options?

2

Modify the arduino sketch to send the data each time there is a reading then send 0 or some other number out of range. Then in your flow, ignore any msg with that value.

3

If you just want a repeat of the message if nothing arrives after 5 minutes maybe the node-red-contrib-msg-resend will do the job for you

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4

Good ideas, thanks.