DIMER for 7" official raspberry screen #699
Replies: 12 comments 6 replies
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Try this for me: # existing value
cat /sys/class/backlight/rpi_backlight/brightness
# set at 50%
echo 128 > /sys/class/backlight/rpi_backlight/brightness
# set at 100%
echo 255 > /sys/class/backlight/rpi_backlight/brightness |
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Hello !
Thanks for your reply. It works perfectly,
Would be interesting to implement gradient brightness values like this :
OFF
20
40
60
100
255
ON
If someone else interesting, may a live ambient light sensor can be interesting in the future…
One more time congrats for your great job !
Cheers
Pascal
… Le 15 déc. 2021 à 11:54, rern ***@***.***> a écrit :
Try this for me:
# existing value
cat /sys/class/backlight/rpi_backlight/brightness
# set at 50%
echo 128 > /sys/class/backlight/rpi_backlight/brightness
# set at 100%
echo 255 > /sys/class/backlight/rpi_backlight/brightness
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Can you recall output of the 1st command?
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Sorry what do you mean by recall output . Sorry my coding skills are limited !
But I don’t have any message indicating a non existing file or folder.
Nothing as to be configured to enable the display. It’s a SDI connection, only I’ve to select “Browser on RPi” in R-Audio features.
… Le 15 déc. 2021 à 15:29, rern ***@***.***> a écrit :
Can you recall output of the 1st command?
It tells the file exists or not before setting values. I'm trying to find an indicator of the connected display to show an option in the Settings.
Do you have to configure something to enable the display?
If none, please try:
Disconnect the display > Power on
Does /sys/class/backlight/rpi_backlight/brightness still exist?
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All right. Let's start over again.
If the output is NO, that's enough. If YES, continue:
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Hi Rern,
I’ve made the test the results :
All right. Let's start over again.
Reboot
command: [[ -e /sys/class/backlight/rpi_backlight/brightness ]] && echo YES || echo NO - Note the output, YES or NO.
YES
Power off
Disconnect jumper and ribbon cables of 7" display from RPi
Power on
command: [[ -e /sys/class/backlight/rpi_backlight/brightness ]] && echo YES || echo NO - Note the output, YES or NO.
NO
Additionnaly, I noticed the system reactivity looks a bit slower when the screen is used.
I’m using a RPI4B 8Gb.
cheers
Pascal
… Le 16 déc. 2021 à 08:57, rern ***@***.***> a écrit :
All right. Let's start over again.
Reboot
command: [[ -e /sys/class/backlight/rpi_backlight/brightness ]] && echo YES || echo NO - Note the output, YES or NO.
If the output is NO, that's enough.
If YES, continue:
Power off
Disconnect jumper and ribbon cables of 7" display from RPi
Power on
command: [[ -e /sys/class/backlight/rpi_backlight/brightness ]] && echo YES || echo NO - Note the output, YES or NO.
Power off
Reconnect jumper and ribbon cables of 7" display to RPi
Power on
Done
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Try today's update > Browser on RPi > Brightness setting |
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hi fern,
feature doesn’t appear even after reboot
cheers
… Le 18 déc. 2021 à 03:11, rern ***@***.***> a écrit :
Try today's update > Browser on RPi > Brightness setting
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Hi Pascal, Try:
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Hello Rern,
cat /sys/class/backlight/rpi_backlight/brightness
Then:
255
Still no setting on browser on RPI.
… Le 18 déc. 2021 à 04:00, rern ***@***.***> a écrit :
Hi Pascal,
Try:
Reboot
Post the output of this command:
cat /sys/class/backlight/rpi_backlight/brightness
Then:
echo 255 > /sys/class/backlight/rpi_backlight/brightness
Try the setting of Browser on RPi again
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Hi Pascal, Try: wget https://github.com/rern/rAudio-1/raw/UPDATE/srv/http/assets/js/features.js -O /srv/http/assets/js/features.js |
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Hello,
Still nothing in the features browser on the RPI
… Le 18 déc. 2021 à 15:51, rern ***@***.***> a écrit :
Hi Pascal,
Try:
wget https://github.com/rern/rAudio-1/raw/UPDATE/srv/http/assets/js/features.js -O /srv/http/assets/js/features.js
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Does today's update show the brightness setting? |
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hello Re’n;
yes the brightness setting now appear, but no action.
anyway, now we can see it, next step is to make it working.
cheers and a merry christmas !
… Le 22 déc. 2021 à 10:52, rern ***@***.***> a écrit :
Does today's update show the brightness setting?
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Run this command |
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Hello Rern,
Works perfectly !
One more time you’re great !!!
Some comment :
When using the on screen display (browser on RPI), I encounter a big latency between the playlist/main screen/Librairy panels on the web interface.
If I unconnect the screen, all of this is very reactive.
Can you check this matter?
Cheers
Pascal
… Le 23 déc. 2021 à 03:34, rern ***@***.***> a écrit :
chmod 666 /sys/class/backlight/rpi_backlight/brightness
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The slider is visible in the (browser on RPI) menu. Setting the slider to a new (lower) position doesn't lower the brightness. You have to reboot the device before the actual brightness of the background light goes to the desired level. Is this the way it is supposed to work? |
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My 7 "LCD is connected with a Y cable. When I put that in |
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Hi,
Following and supporting your famous dev form the beginning of the story, I also regularly update my components.
Now using a 7" official screen for test, everything is ok, instead of the high brightness of the screen.
It would be interesting to propose a dimmer, as you already propose a ON/OFF switch, I guess it will be a nice feature.
Cheers
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