Wireless 4-20 mA 2-Channel Sensor is skipping payloads every hour

Hardware
1

Hello,

I noticed that the 2-Channel 4-20 mA sensor we have running on batteries is consistently skipping payloads every 1 hour.

It is set at 10 min reporting interval.

As you can see over last 24 hours, it missies a payload every hour

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I have noticed this behaviour in other sensors.

Wondering if you’ve come across this behaviour?

Also sometimes it sends a payload very quickly (as also shown in the graph).

Not a huge issue, but thought I would ask. Maybe this is a known bug and there is a fix? Thank you!

2
  1. once an hour it send FLY msg. when device sends this message it will stay awake for few seconds, during this time user can configure the device. this enables device configuration over remote. if the regular data msg and FLY overlap, FLY msg will take priority.
  2. there is a change detection feature, looks like its enabled. When this is enabled device will check values every 60sec ( default change check interval) and if the new read values are % diff then last sent, it will send the data
1 Like
3

Thank you @Bhaskar !

Do you have any info on the FLY Feature, and Configuring sensors that way? Any blog posts or videos?

Thanks again!

4

@Eduardo_Mtz please can you share more info

5

Hi @tulanowski sure, a FLY message indicates that the sensor is in RUN mode, but is entering a temporary state where it can be configured. Once the sensor sends a FLY message Node-RED has 2 seconds to respond with a configuration or extend this temporary configuration mode.

If Node-RED has a “Wireless Device” node with Auto Config and OTF Config selected corresponding to the sensor that sent the FLY message then Node-RED will begin to configure that sensor. let me share you a guide for sensor configuration using automatic configuration OTF:

You can refer to Automatic Configuration OTF 10.1.3 section
Thank you,
Eduardo M