Posts by Zohan

  • Raspberry PI 4 with Waveshare PWM controlled Fan HAT

    Hi guys

    I'm in the same boat running Armor lite heatsink w pwm fan! I stumbled on info about overlays, there is 1 called gpio-fan. This is the info from the read me file

    Name: gpio-fan

    Info: Configure a GPIO pin to control a cooling fan.

    Load: dtoverlay=gpio-fan,<param>=<val>

    Params: gpiopin GPIO used to control the fan (default 12)

    temp Temperature at which the fan switches on, in millicelcius (default 55000)

    so i put

    Code
    dtoverlay=gpio-fan,<13>=<60000>

    into config.txt (pwm wire plugged into gpio#13 and 60 for temp)

    after booting i ran

    Code
    vcdbg log msg

    in putty to find out if it loaded. unfortunately this is what it spit out

    006716.968: brfs: File read: /mfs/sd/overlays/gpio-fan.dtbo

    006743.302: dterror: can't find symbol '_hot'

    006743.320: Failed to resolve overlay 'gpio-fan'

    Am I supposed to alter the actual overlay file?

    I'm sure I'm on the right track but have no idea what I'm doing! It looks like I'm on the right track but doing something wrong.

    Any help would be greatly appreciated and hopefully this will be a simple solution for others!

  • LibreELEC on Raspberry Pi 4 - dual screen possible?

    Hi everyone.

    I'm hopping this issue is resolved as well! I've been running Hyperion backlighting on a RPi3 for a while, with issues i never sorted out. I've upgraded to RPi4 and got a hdmi capture dongle to solve some headache. if the dual (clone) output worked i wouldn't need a hdmi splitter (which is causing cec problems) to feed the capture dongle!

    hmmm guess I'm shovelling someone elses project problems into your hands :-/

    Either way, thanks for the great work over the years!