armar

So I got tired of my fan platform (see above) being always on even when I did not need the cooling, so I built a simple controller using a USB relay module. https://www.ebay.com/itm/LCUS-type-1-USB-relay-module-USB-intelligent-switch-control-Z7A9/263383167245 I stripped off part of the USB cable for the fan platform, cut the red wire and connected it to the relay like this. The black wire is untouched. Connections to COM, and NO of the relay module (no soldering needed). The USB->Serial adapter showed up in lsusb but not as /dev/ttyUSB0. I needed to enable CONFIG_USB_SERIAL_CH341=m based on this post. I am running a version of 4.4.154 and luckily enabling this module worked. Now I can turn the fan on and off using a script as described here. I wrote a simple shell script wrapper around it which looks at the temperature from /sys/devices/virtual/thermal/thermal_zone0/temp in a loop and turns the fan on/off based on it. By trial and error I set the limits, I turn it on at 80C and wait for the temperature to fall below 70C to turn it off. It does use an extra USB port (a USB port splitter might work) but works fine now. Normally the fan is off. If I start the script, no fan, until I mpv the "lubimaya lubimaya video" the temperature goes up and then the fan starts and stays on until I close mpv. Would be good if I could tie it to the temperature trip points in the dtb, but I don't know how.

Hi I was trying to setup my RK3328 based A5X Max tv box running armbian ( a fairly recent version 4.4.154 based) as an access point. Yesterday I tried the armbian-config option, and it downloaded/setup things and the access point worked. Because I only need it as an access point sometimes, I went back through armbian-config and turned it off. Today I tried to go through armbian-config and start an access point again, and I see the access point option has disappeared from Networking in armbian-config. !!! Has something changed recently? I might have done a update/upgrade in between. Or does armbian-config just set it up, and to restart it I have to do something different.

That was quick Is it a 4GB version? Can you please run on the pi 4 sysbench cpu --cpu-max-prime=20000 run and sysbench cpu --num-threads=4 --cpu-max-prime=20000 run to do a simple cpu performance comparison with this post? https://forum.armbian.com/topic/8263-armbian-for-khadas-edge-and-edge-vim-rk3399/?do=findComment&comment=77038

I see events/sec on the A5X Max RK3328 box to be higher, about 950 (even above 1000 sometimes). Temperature goes up to 85 though if you run for a while without the fan .... sysbench cpu --num-threads=4 --cpu-max-prime=20000 run Threads started! CPU speed: events per second: 945.34 General statistics: total time: 10.0028s total number of events: 9460 Latency (ms): min: 3.88 avg: 4.23 max: 39.99 95th percentile: 4.10 sum: 39970.70 Threads fairness: events (avg/stddev): 2365.0000/43.46 execution time (avg/stddev): 9.9927/0.01 Maybe if the rk3318 gets a dtb tuned for it, both performance and temperature will go up.

@hexdump Yes I gathered that but can you generate a dts from the device tree dir structure. It is much easier to compare and merge dts tree files (after sorting). @Sico The red light does not mean much. On the A5X Max we had most things working even though the light was red. Are you trying all your experiments with both SD and USB at the same time?

It is possible that the DDR settings for 4GB RAM is different from the DDR settings for 2GB RAM. You could try to find the android dtb, on the box, decompile it to dts, and replace the ddr settings in your dtb with the ones in the android dtb. You can find the android dtb either using adb, or finding a firmware update from the vendor and splitting it up. Both ways are talked about on earlier posts on this thread. In general, comparing the android dtb with the one you are using and selectively copying sections in the dts is a worthwhile effort. Good luck

Try the dtb for boxes with GigE. I know that the a5x and mx10 don't have gigE, and the box-trn9 does. What do you mean by "no inet" vs "no eth0" in your table? Are you using nmtui to configure your network? Check your DNS servers. The last screenshot looks promising. Can you ping the router?

Thanks madmalkav. I added @madmalkav s code above to armbian to rc-a5x.c in drivers/media/rc/keymaps/rc-a5x.c , modified the makefile, and rc-map.h (added a define for RC_MAP_A5X), built installed the kernel and modules. I also changed the dts ir-receiver node to use rc-a5x instead of rc-trn9 3019c3019 < linux,rc-map-name = "rc-a5x"; --- > linux,rc-map-name = "rc-trn9"; I also systemctl disable lircd which I had installed before. Not needed if you don't have it installed. The remote seems to be working, at least some of it. The volume/mute/forward/backward buttons work in the mpv media player. The "back" and "up" "down" buttons work in the browser. The power button brings up the power menu but the OK button does not seem to work in the power menu. I am not sure what the supposed behavior of the remote is for the desktop. If anyone is running kodi, let us know if the remote is useful. Now I need to figure out how to trigger custom scripts with the remote.

% evtest /dev/input/event2 shows me the keypress codes. If you have installed lircd you have to stop it for evtest to work. Try adding a platform fan. I found the A5X MAX even at 1296Mhz can go upto 100C when playing video on a browser. A platform fan, no mods needed takes the temp down 15-20 C, if you mod the case you might have even better cooling. https://forum.armbian.com/topic/9649-proper-cooling-system-of-tv-boxes/?do=findComment&comment=73530

There seems to be 2 approaches to the remotectl in the dts. The android boxes use the ir_key entries in the pwm node, while some older dts like box-trn9 use the ir-receiver node in the dts. I put both of them in, so I could try them out, but I had better luck with the ir-receiver node, as I could cat one of the dev files and see activity when I pressed the remote buttons. I also see a module rc-trn9 loaded. So I disabled the pwm entry and focused on the ir-receiver which I think had a better chance. I did nor try the config file changes. Do you have the remotectl working for libreelec with the config changes?

It works !! thanks

Update on the A5X MAX. I made some modifications to the dts file, mostly merging sections from android and other files. These include dram and Wifi settings for the A5X MAX. The blue led also works now. Attached my latest dts. Max freq is 1296, temp limits are 90C,105C and 110C. None of the changes are very important, use at your own risk. I could get USB webcams to work by enabling some USB AUDIO and VIDEO parameters in the .config and building/installing the kernel. Got a USB fan platform , on which you can place the A5X MAX (no modifications) and get a 15-20C reduction in temps. Details in the cooling of TV Boxes thread. The only problem is that the fan stays on after shutdown. For Bluetooth, I found there were some disconnects/reconnects of BT and Wifi sometimes. Usually would reconnect on its own. Only happened when you use BT. So based on the lwfinger 8723bs github page, I tried the new firmware rtlbt_fw_new by renaming rtlbt_fw to rtlbt_fw_old and copying rtlbt_fw_new to rtlbt_fw in /lib/firmware/rtl_bt and the disconnect/reconnect problems seem to have gone away. I noticed that by default hdmi sound is not enabled, you have to go speaker icon on the panel and change it to hdmi, but if after booting you turn off/on the TV again, the sound through hdmi works, even though the panel Default Sink icon points to spdif. Might indicate some ordering problems during boot. IR remote still does not work. rk3328-a5xbt1.dts

It is definitely not silent, you can hear the fan. I tried a sound meter on my phone from 1 foot away, and it registered 38 db (whisper) If it bothers you just run armbianmonitor and look at the temperature The bigger problem is it runs even after the box is shutdown, but that is probably a problem with the A5X Max or the dtb I am using.

It looks like no one has yet got it running on the A5X Plus, which means a little more work for you. The first thing to do is trying the different rk3328 dtb s in /boot/dtb/rockchip/ by modifying /boot/extlinux/extlinux.conf s FDT field. Read the first post of this thread and use the latest armbian image from the yadi link. If you are lucky one of those dtb s will take you further. For my A5X MAX it was the rk3328-evb.dtb Or you can look at this thread and get a TV Box known to work with Armbian https://forum.armbian.com/topic/8434-the-list-of-models-that-are-running-armbian-amlogic-rockchip-etc/

I just bought a USB cooling fan platform. Came to about $5 with the coupons which popped up. https://www.aliexpress.com/item/Router-fan-DIY-PC-Cooler-TV-Box-Wireless-Cooling-Silent-Quiet-DC-5V-USB-power-120mm/32965335172.html It is about the size of the TV BOX. You Just put the A5X MAX on top of it. The A5X MAX has holes on the bottom of the box. The fan pushes air into the box. I have not made any other holes in the A5X MAX box. I tried, 3 tests 1. Idle. Just running armbianmonitor-m. The temps without the fan are 55-60C, with the fan about 41-45 C 2. mpv on the included Test.mkv fullscreen. The temp change is slow, so I ran the video about 3 times while running armbianmonitor -m. I do not have the media-script. Temps were about 80C without the fan, and 60-62C with the fan. 3. The youtube video Test.mkv running in firefox. 1080P stream, running fullscreen. This is the worst case for video. No media-script again. Again ran the video 3 times. Without the fan about 90C, with the fan about 71C I am running the box at 1296 Mhz max, with the temperature limits set to (90C, 105C, 110C) in the dtb.