Has anyone gotten this package to work? All I keep getting is blank returns no matter what method I use. It also won't write to the brightness file. [image]

Yep, that was it. Thanks @Steve-Mcl In case anyone else runs into this here's the command I ran in the shell to add the permissions sudo chmod a+rw /sys/class/backlight/rpi_backlight/brightness Note this gives every user of the pi permissions to read and write

2 things... does the account running node-red have access to the file trying to be modified? /sys/class/backlight/rpi_backlight/actual_brightness ( code ) You might need to use async or wait for promise to be resolved (see the function code uses then())

I don't think it does since echoing a number to the brightness file from the shell requires the use of sudo bash -c "echo ### > /sys/class/backlight/rpi_backlight/actual_brightness" for getting the brightness I can always use the read file node so not too worried about that, it's mostly setting th…

[image] injector22: I don't think it does since echoing a number to the brightness file from the shell requires the use of sudo bash Normally, node-red doesnt run under sudo (or root) so the very fact you have to use sudo (super user do) at the shell to update the file suggests this is the p…

It sure doesn't. I guess I need to figure out how to make it survive a reboot

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Rpi-backlight not working in a function

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injector22 10 July 2019 17:15 8

I added the command to /etc/rc.local and it's all good now

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Rpi-backlight not working in a function

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