Jump to content


  • Posts

  • Joined

  • Last visited

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. I'm going to try to order one through the current coronavirus situation and we'll see if it gets here. I'll probably test my existing one in a loopback config sooner or later, too.
  2. Note to self: found a description of how to test on loopback at https://raspberrypi.stackexchange.com/questions/36938/garbled-text-using-serial-to-usb-connection
  3. It's USB 1a86:7523 - USB device database says that's a HL-340 / CH340 from QinHeng electronics. I do note that FriendlyElec sells a USB-serial adapter which claims to be based on the "CH340T" but the one I've got isn't the exact same PCB. My PCB looks a little different and is selectable for 3.3V or 5V logic levels and I have it selected for 3.3V. I'm not sure I completely understand about hooking it up as loopback. I don't actually have a second serial adapter or anything else with an external serial port in the house. I guess I wouldn't be all that surprised if the hardware wasn't managing the weird 1500000 bps rate.
  4. minicom is a full blown terminal emulator. I had it set to 1500000bps, 8N1. I should actually correct myself about the behavior I mentioned, actually sometimes one square and sometimes two squares are printed when I press a key.
  5. Also I feel like this is a configuration error on my part because behavior seems consistent.. at the "hit any key to stop autoboot" prompt, if I hit the esc key it prints two squares, if I hit enter or a letter it prints one. This doesn't vary.
  6. Hi there, this might be a dumb question but I've done some searching and haven't gotten any closer to a solution, so, my apologies. I need to connect to my NanoPi M4 over the serial UART because I've made the eMMC unbootable, and I need to tell the board to boot from microSD so I can fix it. I've attempted to do this in both 'minicom' and 'screen' at 1500000 8N1 and the result is the same either way. I can see output from the NanoPi just fine, but when I attempt to send characters, it only displays a question mark imprinted on a square for each character, similar to what I'd expect if e.g. the character was not in my terminal font. It's not just a display problem either - I can pause the boot sequence by mashing keys, but blindly typing commands does nothing. So I don't think the characters are making it intact to the NanoPi. My serial interface is a USB to serial device which was known working properly before my friend mailed it to me. Currently I'm suspicious that I have something configured wrong and that the USB dongle is probably fine. But that's just my best guess. Apologies if this is something very basic, I've been thru the docs and search on the forum but haven't found the answer.
  7. I've run into bugs in console mode... refuses to output anything other than 1920x1080, including on hardware which maxes out at 720p. Sadly I've never figured out the correct incantations to pass to the kernel in the bootEnv (?) to force it to a resolution... everything I've tried just causes it to freeze completely during boot.
  8. This is on a 4GB NanoPi M4 v1. There are a number of files matching the spec '/etc/ssh/ssh_host_*' but they are all zero bytes, which renders the machine inaccessible by ssh. I'm pretty sure this is happening on every install, I've been troubleshooting and reinstalled several times from the latest image and ssh was not working at any time.
  9. After I edit the u-boot settings in armbian-config, do I then need to select "install" to update the boot loader each time? Edit: figured out by looking thru /var/log/armbian-hardware-monitor.log that I do not.
  10. I got as far as 'cat /sys/class/graphics/fb0/modes' and see only 1920x1080 in there ...... that seems weird. Still have not been able to figure out how to get this board to boot to console mode at a specified resolution. Edit: editing the u-boot environment in armbian-config and setting either of the following didn't work: video=HDMI-A-1:1366x768@60 video=card0-HDMI-A-1:1366x768@60 nor did choosing a standard resolution of 1024x768@60 work with either of those connector specifications. nor did setting 'drm.edid_firmware=edid/1024x768.bin' in u-boot in armbian-config.
  11. Hello, I'm trying to use a NanoPi M4 with an old TV. When the system boots, the TV displays "Invalid resolution." However, it works with a different TV, which unfortunately I cannot use full time. I note that on the working TV, there's a line in dmesg stating "Console: switching to colour frame buffer device 240x67" which would imply that this can be configured somewhere?? However I tried searching, the only docs I get are outdated, for other hardware, or don't work. I tried adding 'disp.screen0_output_mode=1280x720p60' to /boot/armbianEnv.txt, but it had no effect. A pointer as to where these settings are actually controlled would be very helpful. Thanks
  12. I'm confused about how this 2-pin fan header does PWM fan control. It sounds to me like the PWM pin just completely turns the power on/off to the 2-pin socket. But I just want to use standard 4-pin PWM fans with this board. Sounds like that would require extra hacking on the linked post (and an extra pin if monitoring fan RPM is desired). Is that correct? I may for the time being just buy a couple $5 4-pin PWM fan controllers with a temp sensor off Amazon, and worry about this later. Kinda wish they'd made it easy to support standard 4-pin 12V PWM fans, even with just a physical connector.
  13. FYI neither of the above answers was correct because ram logging is provided by log2ram on the Cubieboard2 image I am using. I found the answer as to how to disable it elsewhere: http://www.orangepi.org/orangepibbsen/forum.php?mod=viewthread&tid=3448
  14. Didn't get to this and found /var/log full again... still wondering if there is a reason I shouldn't disable log2ram when using a spinning disk?
  • Create New...