Power & Source of Big Ideas

I wanted to know the details more than "reduces temperature" and so I bought a heatsink for one of my two Nanopi Neos. I did not touch the CPU's automatic frequency scaling. I measured with 0-4 "yes > /dev/null &" background processes resulting in 98%/73%/48%/23%/0% CPUs idle...
wertyzp has just ported wiringpi library and posted on that:
http://www.friendlyarm.com/Forum/viewtopic.php?f=47&t=260
I learned a lot on Arm v6 cycle count register with Raspberry Pi Zero in this thread: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=155830 Since Nanopi Neo and M1 are armv7 and quad core there are some differences in how to measure time very precisely. In postings in this forum I descr...
I found a partial solution for the "Device or resource busy" issue when trying to remove a loadable kernel module with "rmmod". What I really want is to be able to install the module again and again in order to execute code in "module_init()" function "in kernel sp...
Friendlyarm people should answer for the Neo. Since the M1 is big brother of Neo (I just took Neo micro SD card and used it to boot my new M1 without problems), the answer from M1 might be the same as for the Neo. And the answer for M1 is "its a random number": http://wiki.friendlyarm.com/...
Today my new (13$) Nanopi M1 arrived, only 13 days after order ;-), and a heatsink for one of my Nanopi Neos. I removed SD card from one of the Neos and inserted into M1 (they use same OS image). Then I powered M1 via GND/5V via UART pins (micro USB is definitely possible as well). And I plugged in ...
I know this is not the right place for this posting. But there is no right place right now for questions regarding all models. We are not allowed to create a new thread under Community. If this posting can be moved to a better place please do so. So here are my questions: 1) Is there a bug reporting...
Finally I got kernel module compiled and "insmod"ed: root@FriendlyARM:~/hello-1# make make -C /lib/modules/3.4.39-h3/build M=/root/hello-1 modules make[1]: Entering directory '/root/linux-3.4' CC [M] /root/hello-1/hello-1.o Building modules, stage 2. MODPOST 1 modules CC /root/hello-1/hell...
Just stumbled over this: http://forum.armbian.com/index.php/topic/1726-nanopi-air-around-the-corner/ "NanoPi NEO-AIR" is already listed in "NanoPC/Pi Series" section of Friendlyarm Wiki: http://wiki.friendlyarm.com/wiki/index.php/Main_Page#NanoPC.2FPi_Series
> H3 is specified to 125 Degrees maximum > That is good to know, I have seen 82°C often, but never >90°C. I did order one heatsink for Nanopi Neo and will do comparison with/without heatsink with my two Neos. "cpu_freq" command gives you the temperature per core: $ cpu_freq CPU0 online=1 t...
Youtube video -- even with volume reduced to 50% it is so loud ;-)

'Nanopi Neo "ffplay"s MP3 via PAM8403 Stereo Audio Amplifier on 89 dB 8 Ω 3W loudspeakers'
phpBB [video]


Hermann.
Hi, I finally found a way to play MP3 songs on Nanopi Neo! I had not so good experiences with ffmpeg on other computers in the past. But I just followed the instructions on this page and all was fine: https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu I had to "configure" with leaving ou...
Interesting, seems to be a new version of the board. I do not have the 5 (new) audio pins (between single row 12 pin and Debug UART. My board looks like the one described in Neo Wiki: http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO#Layout Audio pins are available in 12 pin single row (8-12), s...
> So although the hardware is great and the price is excellent, when you cost-in the time needed to get anything to work, they fall behind. Because they are different from Pi's, it's not such an easy thing to simply port stuff across. > You are right. Recently I learned how to install more that can ...
Nice work! I did checked all 16 wiringPi pins on the 2 row connector. These are the 2x12 pins of NanoPi Neo (part of WiringNP-master/pins/pins.pdf): https://stamm-wilbrandt.de/en/forum/WiringPiPin.png 14 WiringPi pins worked fine, but WiringPi pins 2 and 3 did not work for me. Since I had just solde...
Hi, https://en.wikipedia.org/wiki/USB_On-The-Go allows the Neo/M1 in this case to act as a host. My question was what is needed to allow to "ssh" into Neo without ethernet connection just over the USB cable. Raspberry Pi Zero allows for that (just connect single micro USB cable, set USB co...
Good question, the Neo Wiki does only provide Linux GPIO numbers for the double row connections:
http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO#Layout
> I can get sound by running the speaker-test program, > So you have connected speaker already and it gives sound. Try "omxplayer -p -o local song.mp3", it worked for me on Pi Zero [I posted on "seeing" sound via oscilloscope, but later I connected earphones and could hear the mu...
The M1 product page has the GPIO Pin Spec at bottom: http://www.friendlyarm.com/index.php?route=product/product&product_id=109 There are 8 GND pins, two 3.3V pins and two 5V pins on GPIO. You can power the M1 over GND/5V pins from Debug UART as well (3.3V is definitely not enough to power even m...
Even epiphany-browser does need 340MB memory, not nice for 256MB NanoPi Neo ;-)
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Wow! You did say nothing on install time for "apt-get install xubuntu-desktop" -- for me it was 3 hours! root@FriendlyARM:~# time ( apt-get install xubuntu-desktop ) ... ... aspell-autobuildhash: processing: en [en_US-wo_accents-only]. real 182m59.774s user 13m41.560s sys 17m39.150s root@F...
Hi, that sounds really interesting! But how did you make the apt-get installs work on NanoPi Neo? Even after "apt-get update" and "apt-get upgrade" both packages you describe cannot be installed for my Neo. And apt-cache search does not show them as installable: root@FriendlyARM:...
Hi, all displays sold by FriendlyArm require a NanoPi 2 (perhaps because of it running on Debian). So not even Neos bigger brother M1 (Neo+GPU+HDMI) is mentioned as supported. On the other hand simple Arduinos are able to drive LCDs, it is just a question of having the needed libraries. Once I did p...
Just realized that the NanoPi Neo board itself provides the UART pin information itself! https://stamm-wilbrandt.de/en/forum/Neo.UART.png While it is nice to "minicom" into a networkless Pi Neo, it would be better to "ssh" into it via USB-OTG, because then a basic network between...
Is "dtoverlay=dwc2" and "modules-load=dwc2,g_ether" needed for Neo/M1 USB-OTG?
If so, where to add that since Neo does not have /boot files cmdline.txt and config.txt as the Raspberry Pi Zero?

Hermann.
Thanks for that information! Doing "cat" of that file seems to give the allowed values, with current value in square brackets: root@FriendlyARM:/sys/class/leds/blue_led# cat trigger none mmc0 timer heartbeat backlight [gpio] default-on root@FriendlyARM:/sys/class/leds/blue_led# none, time,...
At least the M1 (bigger brother of Neo) says: http://wiki.friendlyarm.com/wiki/index.php/NanoPi_M1 MicroUSB: for data transmission and power input, OTG It is easy to configure Raspberry Pi Zero for USB-OTG access just over USB cable: http://blog.gbaman.info/?p=791 But I don't see /boot on NanoPi Neo...
There are two "easy" options, but I think you are looking for the third ;-) 1. physically remove the LED (eg. with screwdriver), I did similar with dangerous diode for battery charged RTC module 2. Disable blinking code in firmware and rebuild it 3. find some command/setting that allows to...
Yesterday I received two new webcams which claimed to be 5M (megapixel), but in fact they are 0.3M (640x480), but hey -- for 2$ with free shipping that is fine. I found this detailed report based on lsusb ID "1908:2311 GEMBIRD". I wanted to try them and installed "fswebcam" first...
Yesterday I learned how to connect to a Raspberry Pi Zero via USB2UART connector: https://www.raspberrypi.org/forums/viewtopic.php?p=1021437#p1021437 The same setup works with NanoPi Neo as well (USB2UART switch to 3.3V, connect RXD/TXD/GND with NanoPi Neo TXD/RXD/GND, and connect 5V from cable sold...
You are right: http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO#Make_Your_Own_Ubuntu-Core_with_Qt-Embedded So it is not "linux-3.4.y" but "h3_lichee". I got confused because on Github "h3_lichee" only the M1 is mentioned, and not the Neo. But above Wiki page direct...
Hi, recently I successfully installed kernel modules for Raspberry Pi Zero and was able to compile loadable kernel modules. Today I received two NanaPi Neos and they work fine. Now I want to be able to compiler loadable kernel modules for the Neo. I found linux kernel source trees here: https://gith...