Error with exec command fired from Node-Red

General
1

I’m running Node-Red with Home Assistant on Raspberry Pi.
From Node-Red I fire the the following command:
‘echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-1/new_device’
to initialise 1-wire reading.

Earlier this was working without errors but now I get the following error message:
/bin/bash: line 1: /sys/bus/i2c/devices/i2c-1/new_device: “Read-only file system”

If I run
‘echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-1/new_device’
from the terminal, it works just fine.

The problem has started rather recently but I don’t know which operating system or Home Assistant or Node-Red version has starting to make this error.
The problem seems to be related with file-access rights.
Any explanation?

2

In HA does node red run inside a docker container? If so then if you run that command in a terminal inside the container does it work?

3

Node-Red has been installed as HA add-on. I'm not an expert but I believe that HA and also the add-ons are run in a docker container.

4

So does the command work if you run it in a terminal inside the container. I don't know much about docker so you may have to google to find how to run a terminal in the container if you don't know. I generally avoid Docker (and HA).

5

I'm using the very standard installation available on HA web pages.
As I wrote in the original message, everything worked fine earlier but something
has been changed in some of the recent updates.

6

You might be best to ask on an HA forum then.

7

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