# Node-Red on RPi restarts after ~2 weeks

**URL:** <https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210>\
**Category:** General\
**Created:** [23 September 2024 16:27 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210 "2024-09-23T16:27:41Z")\
**Posts on this page:** 13\
**Page:** 3

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [30 October 2024 13:34 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/41 "2024-10-30T13:34:17Z")

</div>

Interseting. I didnt consider it might be due to excessive context usage in the schedules. There _might_ be something in it.

You can of course modify your flows to remove the context inside cron nodes to see if it helps (and it should remove the need to re-write all your flows: instead, just update the cron entries to send a string & add a `link call` after the cron node)

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/a/6/a662c90b3d91b2478361a789e0e1a9bd63dd5ac1.png)

```auto
[{"id":"f575aa0996438761","type":"cronplus","z":"07f7c6534787ceb5","name":"Daten","outputField":"payload","timeZone":"","storeName":"","commandResponseMsgOutput":"output1","defaultLocation":"","defaultLocationType":"default","outputs":1,"options":[{"name":"Modus","topic":"Modus","payloadType":"str","payload":"global.openwbModus","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"Überschuss","topic":"U","payloadType":"str","payload":"global.Übers-ohne-LP","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"Offset","topic":"offset","payloadType":"str","payload":"flow.offset","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"Sofort","topic":"sofort","payloadType":"str","payload":"flow.sofort","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"min I","topic":"minI","payloadType":"str","payload":"minI.minI","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"frc","topic":"frc","payloadType":"str","payload":"flow.frc","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"go-e","topic":"goe","payloadType":"str","payload":"global.LP2-Leistung","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"Tibber","topic":"Tibber","payloadType":"str","payload":"flow.Tibber","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"I max","topic":"Imax","payloadType":"str","payload":"global.Imax","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"Phasen","topic":"phasig","payloadType":"str","payload":"flow.Phasen","expressionType":"cron","expression":"*/5 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"}],"x":190,"y":800,"wires":[["d71a74992a2221a7"]]},{"id":"45417146841658f2","type":"cronplus","z":"07f7c6534787ceb5","name":"PV-laden","outputField":"payload","timeZone":"","storeName":"","commandResponseMsgOutput":"output1","defaultLocation":"","defaultLocationType":"default","outputs":1,"options":[{"name":"Überschuss","topic":"U","payloadType":"str","payload":"global.Übers-ohne-LP⌀","expressionType":"cron","expression":"*/10 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"PV-laden","topic":"PV","payloadType":"str","payload":"global.openwbModus","expressionType":"cron","expression":"*/10 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"SoC Freigabe","topic":"socfreigabe","payloadType":"str","payload":"global.socfreigabe","expressionType":"cron","expression":"*/10 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"},{"name":"Start PV","topic":"start","payloadType":"str","payload":"global.startpv","expressionType":"cron","expression":"*/10 * * * * *","location":"","offset":"0","solarType":"all","solarEvents":"sunrise,sunset"}],"x":180,"y":720,"wires":[["0f19b84352baf3d4"]]},{"id":"0f19b84352baf3d4","type":"link call","z":"07f7c6534787ceb5","name":"","links":["038f99a129522068"],"linkType":"static","timeout":"30","x":350,"y":720,"wires":[["4d722c16038484a9"]]},{"id":"4d722c16038484a9","type":"debug","z":"07f7c6534787ceb5","name":"debug 1","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":560,"y":720,"wires":[]},{"id":"d71a74992a2221a7","type":"link call","z":"07f7c6534787ceb5","name":"","links":["038f99a129522068"],"linkType":"static","timeout":"30","x":370,"y":800,"wires":[["30d93c12515df1e3"]]},{"id":"30d93c12515df1e3","type":"debug","z":"07f7c6534787ceb5","name":"debug 2","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":560,"y":800,"wires":[]},{"id":"2eb12067f62c3576","type":"group","z":"07f7c6534787ceb5","name":"Load context when payload is flow.xxx or global.xxx","style":{"label":true},"nodes":["6fc4e3b8eb2dcd58","038f99a129522068","36beb2ac4471eba6","d63e39946820db0a"],"x":164,"y":879,"w":462,"h":82},{"id":"6fc4e3b8eb2dcd58","type":"function","z":"07f7c6534787ceb5","g":"2eb12067f62c3576","name":"get context data","func":"\nif (typeof msg.payload === \"string\" && msg.payload.startsWith('flow.') && msg.payload.startsWith('global.')) {\n const [store, key] = msg.payload.split('.')\n if(store === 'flow') {\n msg.payload = flow.get(key)\n } else {\n msg.payload = global.get(key)\n }\n}\nreturn msg;","outputs":1,"timeout":0,"noerr":0,"initialize":"","finalize":"","libs":[],"x":320,"y":920,"wires":[["36beb2ac4471eba6"]]},{"id":"038f99a129522068","type":"link in","z":"07f7c6534787ceb5","g":"2eb12067f62c3576","name":"load context","links":[],"x":205,"y":920,"wires":[["6fc4e3b8eb2dcd58"]]},{"id":"36beb2ac4471eba6","type":"link out","z":"07f7c6534787ceb5","g":"2eb12067f62c3576","name":"link out 1","mode":"link","links":[],"x":585,"y":920,"wires":[]},{"id":"d63e39946820db0a","type":"change","z":"07f7c6534787ceb5","g":"2eb12067f62c3576","name":"lösche","rules":[{"t":"delete","p":"cronplus","pt":"msg"},{"t":"delete","p":"scheduledEvent","pt":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":490,"y":920,"wires":[[]]}]

```

I am interested to see if that improves matters.

Would you be willing to give this a go on one of your systems?

---

<div class="post-metadata">

**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [31 October 2024 20:11 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/42 "2024-10-31T20:11:45Z")

</div>

I don't understand your process, I think it´s complicated and I don't like that!  
I´ve rebuild my flow with injects and I´ll wait a few weeks, if the memory problem is gone or not.

what I don’t quite understand is my other node-red main instance on a virtual machine (x64, much more power than a RPi, with 4gb ram), it has several cronplus nodes too, here I can´t see memory rising over time.  
does it have to do with the processor/architecture x64 \<-\> arm?

---

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [31 October 2024 20:16 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/43 "2024-10-31T20:16:57Z")

</div>

> [@Becker](#):
>
> I think it´s complicated

I'm guessing you haven't learned about the link-call. Its akin to a subroutine and will help I'm many situations to reduce code duplication. It's actually a simplification in most cases.

If you're not interested in learning, that's ok too

---

<div class="post-metadata">

**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [17 November 2024 16:34 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/44 "2024-11-17T16:34:25Z")

</div>

the cronplus were not guilty, NR starts without them wich much less ram (10%).  
but after some days ram rise and rise, after 8 days it is at 30%.  
and the cpu spikes begin after a few days also:

 ![grafik](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/6/c/6c8ee3237d3c40ac30feae9ea493170e87a63194.png)

on my VM (with a much bigger flow and 4GB ram) I replaced some cronplus with injects too, here the ram decreases from 9 to 7% and stays at 7%.

So the cronplus needs some ram I leared.  
I am still at a loss.

the main work (every 5s for both charging stations) comes from this:

```auto
[{"id":"b589034db714acd4","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"Modus","payload":"openwbModus","payloadType":"global","x":140,"y":1500,"wires":[["9fd0cc29df201ca8"]]},{"id":"e66fe4538a4e1c67","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"U","payload":"Übers-ohne-LP","payloadType":"global","x":150,"y":1860,"wires":[["9fd0cc29df201ca8"]]},{"id":"1000fd713681e6fa","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"offset","payload":"offset","payloadType":"global","x":120,"y":1740,"wires":[["9fd0cc29df201ca8"]]},{"id":"f2ae7da003be0761","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"sofort","payload":"sofort","payloadType":"flow","x":110,"y":1540,"wires":[["9fd0cc29df201ca8"]]},{"id":"9e41a8bd4d47fcaf","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"minI","payload":"minI","payloadType":"flow","x":100,"y":1580,"wires":[["9fd0cc29df201ca8"]]},{"id":"3bc782447a157170","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"frc","payload":"frc","payloadType":"flow","x":100,"y":1620,"wires":[["9fd0cc29df201ca8"]]},{"id":"ed24451bab056934","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"goe","payload":"LP2-Leistung","payloadType":"global","x":140,"y":1820,"wires":[["9fd0cc29df201ca8"]]},{"id":"d5f9ca8f20ca7895","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"Tibber","payload":"Tibber","payloadType":"flow","x":110,"y":1660,"wires":[["9fd0cc29df201ca8"]]},{"id":"679a152be4daea2b","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"Imax","payload":"Imax","payloadType":"global","x":110,"y":1700,"wires":[["9fd0cc29df201ca8"]]},{"id":"d807bd297545e9e3","type":"inject","z":"5f6e5e5e2b5d2c03","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"5","crontab":"","once":false,"onceDelay":0.1,"topic":"phasig","payload":"Phasen","payloadType":"flow","x":120,"y":1780,"wires":[["9fd0cc29df201ca8"]]},{"id":"9fd0cc29df201ca8","type":"join","z":"5f6e5e5e2b5d2c03","name":"Objekt","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":false,"timeout":"","count":"10","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":480,"y":1700,"wires":[["42ffd193789a6062","abd526164e81f3dc"]]},{"id":"42ffd193789a6062","type":"switch","z":"5f6e5e5e2b5d2c03","name":"Modus","property":"payload.Modus","propertyType":"msg","rules":[{"t":"eq","v":"0","vt":"num"},{"t":"eq","v":"1","vt":"num"},{"t":"eq","v":"2","vt":"num"},{"t":"eq","v":"3","vt":"num"},{"t":"eq","v":"4","vt":"num"}],"checkall":"true","repair":false,"outputs":5,"x":470,"y":1580,"wires":[["e797fb53d8ef5a6b"],["99dcad8344c3dac9"],["fc6a7b5f6e5f9d96"],["aa7ca45d0867c8e4"],["3dca937338b4bd4c"]]},{"id":"e797fb53d8ef5a6b","type":"change","z":"5f6e5e5e2b5d2c03","name":"aus","rules":[{"t":"set","p":"payload","pt":"msg","to":"0","tot":"num"},{"t":"set","p":"topic","pt":"msg","to":"Stromvorgabe","tot":"str"}],"action":"","property":"","from":"","to":"","reg":false,"x":710,"y":1500,"wires":[["160bb8af94c2bbfe"]]},{"id":"99dcad8344c3dac9","type":"function","z":"5f6e5e5e2b5d2c03","name":"PV","func":"let U = msg.payload.U;\nlet ph = msg.payload.phasig;\nlet O = msg.payload.offset;\nlet frc = msg.payload.frc;\nlet goe = msg.payload.goe;\nlet T;\nif (goe > 1000) {\n T = 0.5;\n O = O /2;\n}\nelse {\n T = 1;\n}\nlet I;\nI = (U*T + O) / ph / 230;\nI = Math.floor(I);\nif (I < 6) {\n I = 6;\n}\nif (I > 16 && ph >= 2) {\n I = 16;\n}\nelse if (I > 22) {\n I = 22;\n}\nif (frc == 1) {\n I = 0;\n}\nmsg.payload = I;\nmsg.topic = \"Stromvorgabe\";\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":710,"y":1540,"wires":[["160bb8af94c2bbfe"]]},{"id":"fc6a7b5f6e5f9d96","type":"function","z":"5f6e5e5e2b5d2c03","name":"min+PV","func":"let U = msg.payload.U;\nlet ph = msg.payload.phasig;\nlet O = msg.payload.offset;\nlet min = msg.payload.minI;\nlet frc = msg.payload.frc;\nlet goe = msg.payload.goe;\nlet T;\nif (goe > 1000) {\n T = 0.5;\n O = O /2;\n}\nelse {\n T = 1;\n}\nlet I;\nI = (U*T + O) / ph / 230;\nI = Math.floor(I);\nif (I < min) {\n I = min;\n}\nif (I > 16 && ph >= 2) {\n I = 16;\n}\nelse if (I > 22) {\n I = 22;\n}\nif (frc == 1) {\n I = 0;\n}\nmsg.payload = I;\nmsg.topic = \"Stromvorgabe\";\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":720,"y":1580,"wires":[["160bb8af94c2bbfe"]]},{"id":"aa7ca45d0867c8e4","type":"function","z":"5f6e5e5e2b5d2c03","name":"Sofort","func":"let Imax = msg.payload.Imax;\nlet sofort = msg.payload.sofort;\nlet I;\nif (sofort <= Imax) {\n I = sofort;\n} else {\n I = Imax;\n}\nif (I < 6) {\n I = 6;\n}\nmsg.payload = I;\nmsg.topic = \"Stromvorgabe\";\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":710,"y":1620,"wires":[["160bb8af94c2bbfe"]]},{"id":"3dca937338b4bd4c","type":"function","z":"5f6e5e5e2b5d2c03","name":"Tibber","func":"let Imax = msg.payload.Imax;\nlet sofort = msg.payload.sofort;\nlet Tibber = msg.payload.Tibber;\nlet I;\nif (sofort <= Imax) {\n I = sofort;\n} \nelse {\n I = Imax;\n}\nif (I < 6) {\n I = 6;\n}\nif (Tibber == 0) {\n I = 0;\n}\nmsg.payload = I;\nmsg.topic = \"Stromvorgabe\";\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":710,"y":1660,"wires":[["160bb8af94c2bbfe"]]},{"id":"160bb8af94c2bbfe","type":"rbe","z":"5f6e5e5e2b5d2c03","name":"nur Änderung","func":"rbe","gap":"","start":"","inout":"out","septopics":false,"property":"payload","topi":"topic","x":1000,"y":1620,"wires":[["01ef531eba669974","5970b8631502e323"]]},{"id":"5970b8631502e323","type":"change","z":"5f6e5e5e2b5d2c03","name":"global.Strom","rules":[{"t":"set","p":"Strom","pt":"global","to":"payload","tot":"msg"}],"action":"","property":"","from":"","to":"","reg":false,"x":990,"y":1580,"wires":[[]]}]

```

maybe somebody could take a look if there is anythink strange, which could rise ram infinite.

last idea:  
I named a global to `global.Übers-ohne-LP⌀`  
could the "⌀" cause memory rising?

---

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [19 November 2024 16:44 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/45 "2024-11-19T16:44:19Z")

</div>

Might be of interest: [Node-red + MCP23017 (x5) slowing down - #27 by TadyTheFish](https://discourse.nodered.org/t/node-red-mcp23017-x5-slowing-down/93165/27)

---

<div class="post-metadata">

**Author:** ![TadyTheFish](https://avatars.discourse-cdn.com/v4/letter/t/839c29/32.png) [@TadyTheFish](https://discourse.nodered.org/u/TadyTheFish)\
**Post date:** [19 November 2024 16:56 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/46 "2024-11-19T16:56:07Z")

</div>

Hello .. sorry for butting in 🙂 my problem was reading CPU and memory stats. It slowed down NR very much after 24h but it never restarted and memory didn't get this high

---

<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [19 November 2024 16:58 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/47 "2024-11-19T16:58:42Z")

</div>

That's fine, your input is welcome.

Just pointing out correlation for @Becker - could be something in it. for example, if he is running these nodes more frequently than you were, it may be the cause or a contributor to it (i.e. a piece of the puzzle)

---

<div class="post-metadata">

**Author:** ![TadyTheFish](https://avatars.discourse-cdn.com/v4/letter/t/839c29/32.png) [@TadyTheFish](https://discourse.nodered.org/u/TadyTheFish)\
**Post date:** [19 November 2024 17:02 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/48 "2024-11-19T17:02:31Z")

</div>

I can participate no problem. OP can you tell me what is NR doing? I saw that charts were already mentioned ( I had problems with them so I used Grafana and used a template node)  
If I understand you correctly you are pooling some data very frequently?

---

<div class="post-metadata">

**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [19 November 2024 19:22 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/49 "2024-11-19T19:22:03Z")

</div>

Could log level "trace" or "debug" help me ?

---

<div class="post-metadata">

**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [25 November 2024 09:15 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/50 "2024-11-25T09:15:59Z")

</div>

I´ve found another error: `kernel: hwmon hwmon1: Undervoltage detected!`  
I´ve seen this error before, so I adjusted the voltage of power supply, but last week I noticed that the untervoltage error came back, even with 5,25V.  
So I replaced the power supply, since 2 days the error doesn´t come back.  
at the same time I changed something in my flow, the processing from 5 to 10s, now the ram stays at 13,0% (NodeRed) and there are no cpu spikes:

 ![grafik](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/9/7/97c4b929c69858ea92d5bf8f55093e028930730c.png)

I don´t know if the power supply caused the cpu spikes + ram rising.

**I´ll monitor it for another 2 weeks and then mark this as solved**

---

<div class="post-metadata">

**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [7 December 2024 18:38 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/51 "2024-12-07T18:38:28Z")

</div>

the untervoltage has nothing to do with my problem.

so my search goes on.

Today I discovered something very strange that I cannot explain:

I query one Eastron SDM630 with USB RS485:

 ![grafik](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/d/8d44fbfc642313ad980b4dff62f8da9cd1da5aca.png)

I copied my flow from another RPi3, where I query 3x SDM72 & 1x SDM630.  
the SDM630 with 38,4kBaud takes 0,6s.

On this flow it takes 1,7s  
so I changed to 9,6kBaud, now one query takes 1,5s =\> **any explanation for this?**

Could the problem be with the RS485 adapter which has problems with 38.4kBaud?

I use different adapters, on my other RPi3 with 0,6s I use a more expensive one.

* * *

2nd question: I´ve a very simple join node, with 2 msg incoming.  
the first msg comes every 2s  
the second msg comes only if I change a slider (in my dashboard) =\> could this rise memory ?

* * *

I played on both and after that I saw memory drops 13% 😵

---

<div class="post-metadata">

**Author:** ![Becker](https://avatars.discourse-cdn.com/v4/letter/b/c77e96/32.png) [@Becker](https://discourse.nodered.org/u/Becker)\
**Post date:** [17 December 2024 07:38 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/52 "2024-12-17T07:38:03Z")

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I can finally say problem solved 🙂  
Don´t know if it was the modbus 38,4k query or the join node.

Node Red stays at 11,5% Ram since 8 days, no cpu spikes.  
21% Ram in total.

that was the longest troubleshooting ever 🫣

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [31 December 2024 07:38 UTC](https://discourse.nodered.org/t/node-red-on-rpi-restarts-after-2-weeks/91210/53 "2024-12-31T07:38:17Z")

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Closed on 31 December 2024 07:38 UTC

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