Nodered resets if trying to use Modbus RTU

[PakkoB]

I´m breaking my head against a wall with this problem. The flows attached have been working for more than a year using RTU server.
Suddenly, last december, RTU stopped working. Thinking it was a hardware problem, I began to use an Elfin EW11a to access my inverter. If I connect with EW11A, not a problem at all.
After changing the RS485-USB converter, still not working. Checked USB ports. All OK.
Even if I use mbpoll, I can communicate with teh inveter. But every time I try it using the flow with RTU server, Nodered start rebooting endlessly. It never connect to the inverter.
Don´t know what more to do.
I would like to attach my flows in order if someone can find what problem hides in them, but new members aren´t allowed..
Regards,
PakkoB

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"id": "2e16cb4dab5c3923",
"type": "influxdb",
"hostname": "192.168.1.67",
"port": "8086",
"protocol": "http",
"database": "Ormu23",
"name": "Conexión a Ormu23",
"usetls": false,
"tls": "",
"influxdbVersion": "1.x",
"url": "http://localhost:8086",
"rejectUnauthorized": true
},
{
"id": "26d6b97598760778",
"type": "modbus-client",
"name": "EW11",
"clienttype": "tcp",
"bufferCommands": true,
"stateLogEnabled": false,
"queueLogEnabled": false,
"failureLogEnabled": false,
"tcpHost": "192.168.1.121",
"tcpPort": "502",
"tcpType": "DEFAULT",
"serialPort": "/dev/ttyUSB0",
"serialType": "RTU-BUFFERD",
"serialBaudrate": "9600",
"serialDatabits": "8",
"serialStopbits": "1",
"serialParity": "none",
"serialConnectionDelay": "100",
"serialAsciiResponseStartDelimiter": "0x3A",
"unit_id": "1",
"commandDelay": "1",
"clientTimeout": "3000",
"reconnectOnTimeout": true,
"reconnectTimeout": "2000",
"parallelUnitIdsAllowed": true
},
{
"id": "e0001ac3815cacbc",
"type": "ui_group",
"name": "Consumos",
"tab": "ea4a1e2038369c00",
"order": 1,
"disp": true,
"width": "6",
"collapse": false,
"className": ""
},
{
"id": "ea4a1e2038369c00",
"type": "ui_tab",
"name": "Consumo",
"icon": "dashboard",
"disabled": false,
"hidden": false
}
]

[Colin]

Welcome to the forum @PakkoB

Stop node red then restart in a command window and copy/paste the full output here, up the time it restarts again. Copy/paste please, not screenshot. Hopefully that will show why it is restarting.

Also tell us what OS you are running on and how you installed node red.

[PakkoB]

Hi,
Thxs for your kind reply.
My OS is Raspbian Bulleye 32bit.
I run nodered as a container using portainer.
The log doesn’t show any kind of error, only the usual messages when starting nodered.
It reboots just after showing them.

[Colin]

@PakkoB

usual messages when starting nodered.
It reboots just after showing them

Show us please. From the welcome to node red message.

[PakkoB]

That´s all that show in a full reboot:

2023-01-10T20:16:07.052540654Z

2023-01-10T20:16:07.052662839Z > node-red-docker@2.2.3 start /usr/src/node-red

2023-01-10T20:16:07.052692079Z > node $NODE_OPTIONS node_modules/node-red/red.js $FLOWS "--userDir" "/data"

2023-01-10T20:16:07.052717801Z

2023-01-10T20:16:08.403471122Z 10 Jan 21:16:08 - [info]

2023-01-10T20:16:08.403547140Z

2023-01-10T20:16:08.403574399Z Welcome to Node-RED

2023-01-10T20:16:08.403598417Z ===================

2023-01-10T20:16:08.403621306Z

2023-01-10T20:16:08.406189712Z 10 Jan 21:16:08 - [info] Node-RED version: v2.2.3

2023-01-10T20:16:08.407056965Z 10 Jan 21:16:08 - [info] Node.js version: v12.22.8

2023-01-10T20:16:08.407644608Z 10 Jan 21:16:08 - [info] Linux 5.10.103-v7l+ arm LE

2023-01-10T20:16:08.945083703Z 10 Jan 21:16:08 - [info] Loading palette nodes

2023-01-10T20:16:11.077623287Z 10 Jan 21:16:11 - [info] Dashboard version 3.3.1 started at /ui

2023-01-10T20:16:11.116478509Z 10 Jan 21:16:11 - [info] Settings file : /data/settings.js

2023-01-10T20:16:11.118333828Z 10 Jan 21:16:11 - [info] Context store : 'default' [module=memory]

2023-01-10T20:16:11.120281572Z 10 Jan 21:16:11 - [info] User directory : /data

2023-01-10T20:16:11.120795643Z 10 Jan 21:16:11 - [warn] Projects disabled : editorTheme.projects.enabled=false

2023-01-10T20:16:11.122674795Z 10 Jan 21:16:11 - [info] Flows file : /data/flows.json

2023-01-10T20:16:11.154055462Z 10 Jan 21:16:11 - [warn]

2023-01-10T20:16:11.154154054Z

2023-01-10T20:16:11.154182554Z ---------------------------------------------------------------------

2023-01-10T20:16:11.154206517Z Your flow credentials file is encrypted using a system-generated key.

2023-01-10T20:16:11.154250035Z

2023-01-10T20:16:11.154272664Z If the system-generated key is lost for any reason, your credentials

2023-01-10T20:16:11.154316812Z file will not be recoverable, you will have to delete it and re-enter

2023-01-10T20:16:11.154341979Z your credentials.

2023-01-10T20:16:11.154364053Z

2023-01-10T20:16:11.154404126Z You should set your own key using the 'credentialSecret' option in

2023-01-10T20:16:11.154427811Z your settings file. Node-RED will then re-encrypt your credentials

2023-01-10T20:16:11.154450441Z file using your chosen key the next time you deploy a change.

2023-01-10T20:16:11.154493274Z ---------------------------------------------------------------------

2023-01-10T20:16:11.154516422Z

2023-01-10T20:16:11.206773781Z 10 Jan 21:16:11 - [info] Server now running at http://127.0.0.1:1880/

2023-01-10T20:16:11.208925876Z 10 Jan 21:16:11 - [info] Starting flows

2023-01-10T20:16:12.195493722Z 10 Jan 21:16:12 - [info] Started flows

2023-01-10T20:16:12.250100416Z 10 Jan 21:16:12 - [metric] {"level":99,"nodeid":"15edb2e7.a89c9d","event":"node.inject.receive","timestamp":1673381772249}

2023-01-10T20:16:12.254843657Z 10 Jan 21:16:12 - [metric] {"level":99,"nodeid":"15edb2e7.a89c9d","event":"node.inject.send","msgid":"977dd18790d0009c","timestamp":1673381772254}

2023-01-10T20:16:12.257772394Z 10 Jan 21:16:12 - [metric] {"level":99,"nodeid":"15edb2e7.a89c9d","event":"node.inject.done","msgid":"977dd18790d0009c","timestamp":1673381772257}

2023-01-10T20:16:12.259172421Z 10 Jan 21:16:12 - [metric] {"level":99,"nodeid":"48259aeee3107fd4","event":"node.inject.receive","timestamp":1673381772258}

2023-01-10T20:16:12.259870304Z 10 Jan 21:16:12 - [metric] {"level":99,"nodeid":"48259aeee3107fd4","event":"node.inject.send","msgid":"84c6e565f50bb986","timestamp":1673381772259}

2023-01-10T20:16:12.260504077Z 10 Jan 21:16:12 - [metric] {"level":99,"nodeid":"48259aeee3107fd4","event":"node.inject.done","msgid":"84c6e565f50bb986","timestamp":1673381772260}

2023-01-10T20:16:15.162659278Z

[PakkoB]

When reboot festival starts, the only way to stop it is removing the file flows.json, killing the container and recreate it. After that I import the flows again but running with the Elfin EW11a server.

[Colin]

You said in the title that node-red resets, but now it seems that you mean the machine reboots. Is that correct? If so then look in /var/log/syslog to see why it reboots.

@PakkoB

After that I import the flows again but running with the Elfin EW11a server.

I have no idea what you mean by that.

[PakkoB]

Sorry, but english is not my first language and it is possible I don´t express clearly.
No, what resets is nodered. The Raspberry keeps working without problem.
What I say about importing the flows and using Elfin EW11a is the workaround I´ve found to keep using the flows to monitor the inverter, because using RTU mode resets nodered.
All the other containers (grafana, influxdb, homeassistant, portainer) run smoothly.
But if I use mbpoll in mode rtu, it can communicate with the inverter. So the problem is in nodered.

[Colin]

@PakkoB

what resets is nodered

OK. If you look at the log you will see that it stops in the middle of a line. That means that node-red did not crash, it was killed by something external to it. Have a look in the system log to see if there is anything there.