Monthly Archives: December 2017

VoCore2 USB Screen Part1

First Merry Christmas! We do not have Christmas but still happy, anyway New Year is coming.

Finally I have chance get back to develop the screen.

PS: this two weeks I am busy on take care of my baby. That should be one of the most hard work in the world.

This is the new board I assemble manually.

Of course it is very small, I like small board 🙂

But today is not my lucky day, nothing works on this board, USB is not working, even the LCD backlight is not working either.

LCD = data + backlight, data from USB, and backlight from onboard boost DCDC powered by 5V.

Hopefully tomorrow once I wake up, the old Santa man have already fixed it.

VoCore2: WiFi Driver for Linux 4.9(LEDE latest version) 2


This new wifi driver fix a weird bug of VoCore2 Ultimate.

We found using the on board antenna, it will crosstalk to the sound chip, when it play music, we can hear some noise from the radio.

But when I am using the new wifi driver, just find the noise disappear!

That’s really weird. Need more test. :p

VoCore2: WiFi Driver for Linux 4.9(LEDE latest version)

I have spend a lot of time on this, finally it is working perfect with latest LEDE!!
This firmware also enable sniffer/monitor mode for possible fun.

This driver is more stable than last time one for Linux 4.5, I have used iperf3 test one hour, average speed is greater than 40Mbps — one on board blue antenna, and over 50Mbps for one external antenna. Of course double external antennas will be much faster.

firmware with blob here:
md5: 9a7ef2de60713cfb7c951ba4a6a92b81

mt7628.ko: for Linux 4.9
iwpriv and iwconfig:

mt7628.dat: used to config wifi kernel. uncompress and put it to /etc, link here

mt7628.dat should in this path /etc/wireless/mt7628/mt7628.dat

PS: unfortunately, because of MTK NDA, I can not public its source code.

How to use?
First of all: insmod mt7628

1. Enable wifi AP mode:

ifconfig ra0 up
brctl addif br-lan ra0

2. Enable monitor/sniffer mode(I never use sniffer mode before, maybe it works)

ifconfig mon0 up

3. Enable STA mode…(this need compile iwpriv into the firmware, I did not try)

iwpriv ra0 set SiteSurvey=1
sleep 1
iwpriv ra0 set SiteSurvey=0
iwpriv ra0 get_site_survey

iwpriv ra0 set Channel=11 (must same as your AP, this value can get from "iwpriv ra0 get_site_survey")
iwpriv apcli0 set ApCliEnable=0
iwpriv apcli0 set ApCliAuthMode=WPA2PSK (normally WPA2 personal we use this setting)
iwpriv apcli0 set ApCliEncrypType=AES
iwpriv apcli0 set ApCliSsid=[YOUR SSID]
iwpriv apcli0 set ApCliWPAPSK=[YOUR SSID PASSWORD]
iwpriv apcli0 set ApCliEnable=1

make uci work with this driver. Currently have to manually insert the driver and start up it. :p

VoCore2: Wireless Driver for Linux 4.9

xxxx, LEDE Linux 4.9 kernel has changed a lot! Transport MediaTek wireless driver is very painful this time, part of the code have to be rewriten. :'(

PS: I think MTK should hire me for transport driver to openwrt/LEDE, I guess I know the driver even better than some of their engineers, lol :p

monitor mode, multi SSID, mesh network, and various of packages… everything is that delicious…attract me spend my time, have to work harder 🙂