Posts by ghtester

  • LibreELEC 9.2.6 Raspberry 4 and IrDA Dongle

    Don't try to do many unnecesary things... ;)

    It looks you did not use the -a parameter properly. After any change in mapping file ( /storage/.config/rc_keymaps/custom_remote ) do this to save the changes permanently:

    systemctl stop kodi

    systemctl stop eventlircd

    ir-keytable -a /storage/.config/rc_maps.cfg -s rc0

    systemctl start eventlircd

    systemctl start kodi


    Of course in your /storage/.config/rc_maps.cfg file you need to have this line:

    gpio_ir_recv * /storage/.config/rc_keymaps/custom_remote

    Test with

    ir-keytable -t -s rc0

    while pushing RC control buttons to check if you are receiving scancodes (need to have the appropriate RC protocols enabled, for example ir-keytable -plirc -pnec -pRC5 -s rc0 )

    Then use

    irw

    to test the key mapping.

  • LE 9.80 Nightly 20210126 - flickering / blank screen issue - H.265 streams 1280x720 and 1440x1080 on RPi 4B

    It looks that support for Stereoscopic 3D mode was added (a 'glasses' symbol in Kodi Player) but it makes trouble with some Live TV channels on my RPi 4B.

    The issue was observed with one Live TV H.265 channel at 1280x720 px Video stream, 1.78 AR, 50.000 FPS which is flickering (never seen that before).

    The same issue is also with H.265 1440x1080 px stream (The Display resolution is 1920x1080)


    When I tried to play with 'glases' or 'wheel / Video' settings, the only change I could make was to achieve a black screen with audio. It was not possible to disable the 3D mode so the channel is not viewable.

    Other channels (with H.265 streams 1920x1080, 960x544) are working fine.

    Edit - it looks I have turned on the Stereoscopic 3D mode when I tried to stop flickering and it's not easy to get away the 'glasses' from the bar... :)

    Nevertheless, so far I could not fix that annoying issue...

    Edit 2 - When the issue happens (currently a black screen), one CPU is running at 100%. At random intervals, this 100% load moves to some other CPU, at that switch moment a picture snapshot is displayed for a moment and audio is interrupted for a moment.

    I have also tried to record the stream and open recording afterwards - the same issue...

  • LibreELEC 9.2.6 Raspberry 4 and IrDA Dongle

    1) I would say NO, at least NOT the device you mentioned above because IrDA/USB Bridge purpose is 2-way data transfers between IrDA devices (mostly in past) and AFAIK in general it's a quite different protocol than any of IR remote control protocols. Maybe some IrDA devices can be also used as IR RC receiver but I don't have any experience with this and it may vary. See Infrared Data Association - Wikipedia versus Remote control - Wikipedia

    2) On RPi 4B it's not a big difference between Raspberry_Pi_OS and LibreELEC (with the same or similar kernel release) regarding to IR remote control configuration, you just need to use the proper config files / config files paths in LibreELEC as some default files are in read-only filesystem and you need to put the files (that you need to edit) to override paths as described in wiki here: Infra-Red Remotes - LibreELEC.wiki

    Everything is working fine on RPi 4B / LE 9.2.6 so just read carefully and follow the instructions.

    The simple IR sensor can be used on RPi through GPIO pins.

    The /flash/config.txt update you have done should be OK, although I would put a pin number there:

    dtoverlay=gpio-ir,gpio_pin=18

    You may change the GPIO pin, GPIO18 is a default when not specified.

    Connect the IR sensor's data pin to GPIO18,, Vcc to 3,3V, GND to GND, reboot the RPi and use ir-keytable to configure / map keys in accordance to wiki examples. That's all.

    Also don't forget to update the RPi's bootloader to some of recent versions (at least directly from LE 9.2.6).

    In case you still won't get a reply from ir-keytable similar to example below, your LE installation is probably screwed up somehow and consider to start with a fresh LE 9.2.6 installation:

    Found /sys/class/rc/rc0/ with:

    Name: gpio_ir_recv

    Driver: gpio_ir_recv

    Default keymap: rc-rc6-mce

    Input device: /dev/input/event1

    LIRC device: /dev/lirc1

    Attached BPF protocols:

    Supported kernel protocols: lirc rc-5 rc-5-sz jvc sony nec sanyo mce_kbd rc-6 sharp xmp imon rc-mm

    Enabled kernel protocols: lirc nec

    bus: 25, vendor/product: 0001:0001, version: 0x0100

    Repeat delay = 500 ms, repeat period = 125 ms

  • Optimized Logitech Harmony remote with Libreelec

    In general, it's easy to make the IR receiver working on RPi 4B using GPIO and IR sensor.

    At first, you need to enable it - put this line to /flash/config.txt file (read only by default, remount as RW before edit):

    dtoverlay=gpio-ir,gpio_pin=18

    You may change the GPIO pin, GPIO 18 is a default when not specified.

    Then connect the IR sensor's data pin to GPIO18, reboot the RPi and use ir-keytable to configure / map keys as described here: Infra-Red Remotes - LibreELEC.wiki

  • Strange problem with raspberry pi4 + USB nas + smart plug

    Well, I don't think that Libreelec is a root of your trouble... Instead, it sounds like your USB multi-HDD box (in fact it's probably not a NAS, which means Network Attached Storage) maybe generates some high-frequency noise which may interfere with your WiFi network. I don't know how your device looks like exactly, it might be the external Power Supply of that box... It should have a metal shielding inside, under the plastic cover, but there are some cheap products that don't respect any construction rules... Don't know if it's the case but maybe yes... And it's possible it may change over the time due to parts degradation, especially capacitors... Also a different WiFi devices may have a different sensitivity to a noise or a too low power to overcome it..

    Try to move the devices a bit or try to make a temporary shield to your USB box / box power supply using aluminium foil (carefully, I do NOT mean to open the boxes!) and check tf there's any difference.

  • Share Add-ons on Rpi4

    I am afraid currently NOT, unfortunately.

    AFAIK Kodi does not support a second display on LE / RPi 4B.

    Tried already on LE 9.80 Nightly couple months ago (want to use a second display for camera stream) but failed... Only 1 of 2 HDMI ports can be used for video output, but audio can be switched between 2 HDMI devices connected at the same time.

  • PVR Tvheadend HTSP Client not available in LE 9.80 Nightly 20210117

    I have just upgraded LE 9.80 Nightly from 20210116 to 20210117 with Kodi 19 RC1.

    Unfortunately the PVR Tvheadend HTSP Client 8.1.2.1 was disabled as incompatible and can't be upgraded easily (No updates available | There are currently no versions available for this add-on).

    It seems that PVR clients choice disappeared from All repositories list.

    Should I be able to install the compatible version somehow (a search for an appropriate .zip file failed) or need to wait?

  • bootloader change LibreELEC (Leia) 9.2.6

    Well, I tried to make the description of the procedure as simple as possible above (including the commands which you just need to run) and I almost don't know how to do it even easier ... :-/

    Are you at least able to connect to your RPi / Libreelec via the SSH console?

    If so, do it, then copy and paste these commands to SSH console and put the responses here:

    rpi-eeprom-update

    vcgencmd bootloader_version

    vcgencmd bootloader_config