Posts by kw12157

kw12157 · Playback pausing kw12157 October 14, 2019 at 9:58 PM

I ran a couple of Pi 3 B+ for a couple of years with no issues.

I upgraded these to the latest LibreELEC version a few months ago and started getting mp3 and mp4 playback pausing. What happens is the mp3 or mp4 file starts playing. Then it pauses for a second or two then resumes playing. It happens every 15 to 60 seconds or so.

I noticed that my living room Pi was on 2 GHz WiFi. I looked at changing to 5 GHz and found that it did not see my 5 GHz SSID.

I installed the latest version of LibreELEC on a Pi 4 4GB a couple of days ago. I was able to connect it to my 5 GHz WiFi during install. I still had the pausing issue with both mp3 and mp4 playback.

I found this article on modifying the cache.

HOW-TO:Modify the video cache - Official Kodi Wiki

Here is my advancedsettings.xml file that I created.

<cache>

<memorysize>204857600</memorysize

</cache>

</advancedsettings>

These settings resolved the mp4 playback issue. But mp3 playback still pauses. I have read that the cache settings should work for both video and audio.

How do I fix the mp3 playback pausing?

Thanks in advance,

Kevin

kw12157

Now that that is working, on to the next piece of the puzzle. Juice4halt supplied a script to be used to reboot the pi instead of using the reboot command to keep the juice4halt hat and pi in synch.

Options:

1. Backup the reboot file in /sbin and rename the reboot4h script to reboot and copy it to the /sbin directory. The trouble I am having with this option is that I haven't been able to write to that directory.

2. Change the reboot button to point to the reboot4h script instead of the reboot command. Is this possible?

Any other suggestions would be welcome!

Thanks in advance!

kw12157

I don't know how or why, but it looks like it the original script does work by just removing the sudo in the last line. How can it write to the files in the sys/class/gpio directory? I thought that entire drive was read only...?

Iridium, thanks for your help!

kw12157

I am trying to get a juice4halt hat working with my Pi 3+ running LibreELEC. A script makes the hat work. It is suppose to safely shutdown the OS after power is lost, then power off the Pi. It works correctly with the original script running under Raspbian. I modified the script to move the directory structure to storage which is writable under LibreELEC. The modified script works as if it does not see the juice4halt hat and shuts down the OS at the completion of booting, which is what is suppose to happen when the juice4halt hat is not detected.

Below are the original script and the modified script

ORIGINAL

Original

#!/bin/bash

#title :shutdown_script

#description :This script runs on Raspberry Pi equipped with the Juice4Halt module.

#author :Nelectra s.r.o.

#date :20190415

#version :1.2 (bug fixed: collision with the rebootj4h script solved by reading the GPIO25 pin 2x)

#usage :copy this file to /home/pi/juice4halt/bin/

# and make it executable: sudo chmod 755 shutdown_script

#notes :Juice4halt – Supercapacitor UPS for RPi

#copyright :GNU GPL v3.0

#==============================================================================

#create directory for working with GPIO and wait

echo "25" > /sys/class/gpio/export

sleep 0.2s

# use the pin as an open-drain output, send a short LOW pulse (= Booting finished, shutdown_script runs, automatic shutdown enabled)

# then change to input and listen

# if a LOW is sent from the J4H then start with the shutdown

# set GPIO25 as output and set output to LOW

echo "out" > /sys/class/gpio/gpio25/direction

echo "0" > /sys/class/gpio/gpio25/value

sleep 0.1s

echo "in" > /sys/class/gpio/gpio25/direction

#wait until pin rises to HI

sleep 0.1s

pinval1="1" # 1st reading

pinval2="1" # 2nd reading

#to be resistant to short pulses (e.g. 100ms pulse generated by the rebootj4h script) two readings 200ms apart from each other are required

while [ "$pinval1" != "0" -o "$pinval2" != "0" ]

do

#reading the value of the input pin

pinval1=$(cat /sys/class/gpio/gpio25/value)

#wait

sleep 0.2s

#reading the value of the input pin again 0.2s later

pinval2=$(cat /sys/class/gpio/gpio25/value)

done

# set GPIO25 as output and set output to LOW

echo "out" > /sys/class/gpio/gpio25/direction

echo "0" > /sys/class/gpio/gpio25/value

# wait for system halt

# after system halted the pin will be automatically switched to input and the level will be pulled up to HI

# a LOW to HI transition signals to the J4H to turn the power off

echo ""

echo "Juice4halt: Power failure, RPi will now shut down."

sudo halt

--------------------------------------------

MODIFIED

Modified

#!/bin/bash

#title :shutdown_script

#description :This script runs on Raspberry Pi equipped with the Juice4Halt module.

#author :Nelectra s.r.o.

#date :20190415

#version :1.2 (bug fixed: collision with the rebootj4h script solved by reading the GPIO25 pin 2x)

#usage :copy this file to /home/pi/juice4halt/bin/

# and make it executable: sudo chmod 755 shutdown_script

#notes :Juice4halt – Supercapacitor UPS for RPi

#copyright :GNU GPL v3.0

#==============================================================================

#create directory for working with GPIO and wait

echo "25" > /sys/class/gpio/export

sleep 0.2s

# use the pin as an open-drain output, send a short LOW pulse (= Booting finished, shutdown_script runs, automatic shutdown enabled)

# then change to input and listen

# if a LOW is sent from the J4H then start with the shutdown

# set GPIO25 as output and set output to LOW

# echo "out" > /sys/class/gpio/gpio25/direction

echo "out" > /storage/home/pi/juice4halt/gpio/gpio25/direction

# echo "0" > /sys/class/gpio/gpio25/value

echo "0" > /storage/home/pi/juice4halt/gpio/gpio25/value

sleep 0.1s

# echo "in" > /sys/class/gpio/gpio25/direction

echo "in" > /storage/home/pi/juice4halt/gpio/gpio25/direction

#wait until pin rises to HI

sleep 0.1s

pinval1="1" # 1st reading

pinval2="1" # 2nd reading

#to be resistant to short pulses (e.g. 100ms pulse generated by the rebootj4h script) two readings 200ms apart from each other are required

while [ "$pinval1" != "0" -o "$pinval2" != "0" ]

do

#reading the value of the input pin

pinval1=$(cat /storage/home/pi/juice4halt/gpio/gpio25/value)

#wait

sleep 0.2s

#reading the value of the input pin again 0.2s later

pinval2=$(cat /storage/home/pi/juice4halt/gpio/gpio25/value)

done

# set GPIO25 as output and set output to LOW

# echo "out" > /sys/class/gpio/gpio25/direction

echo "out" > /storage/home/pi/juice4halt/gpio/gpio25/direction

# echo "0" > /sys/class/gpio/gpio25/value

echo "0" > /storage/home/pi/juice4halt/gpio/gpio25/value

# wait for system halt

# after system halted the pin will be automatically switched to input and the level will be pulled up to HI

# a LOW to HI transition signals to the J4H to turn the power off

echo ""

echo "Juice4halt: Power failure, RPi will now shut down."

halt

Modified

----------------------

I can # out the last line and let LibreELEC boot and start Kodi. Then SSH into the device and see that the script is running. It is creating the files (value and direction) in the correct location.

I am a novice, but it acts to me like it is not sensing the voltage on gpio25.

Can someone give me some help on getting this to work?

Thanks in advance!

Posts by kw12157

Playback pausing

help in getting juice4halt hat working on Pi 3+

help in getting juice4halt hat working on Pi 3+

help in getting juice4halt hat working on Pi 3+