Building for Mediatek Linkit Smart 7688

For Developers
1

I'm now building my own Firmware and have questions regarding several problems i whan't to make work.
What id did so far is:

  1. created a VM on my Mac with Ubuntu 18.04
  2. installed dependencies: sudo apt-get install git g++ libncurses5-dev subversion libssl-dev gawk libxml-parser-perl unzip
  3. made a workfolder ~/openwrt/18.06/
  4. cloned openwrt from git: git clone https://git.openwrt.org/openwrt/openwrt.git
  5. changed directory to ~/openwrt/18.06/openwrt/
  6. as described in the developer guide: ./scripts/feeds update && ./scripts/feeds install -a
  7. make make menuconfig see my config file for details here.

This does not work:

  1. Automaticaly activate WLAN: i tried this in '~/openwrt/18.06/openwrt/files/etc/uci-defaults/99_enable_wifi` without success. Wifi does not turn on when first booted.
  2. LuCi is reachable but it splashes a error:
/usr/lib/lua/luci/controller/arduino/index.lua:65: attempt to index field 'authenticator' (a nil value)
stack traceback:
	/usr/lib/lua/luci/controller/arduino/index.lua:65: in function 'v'
	/usr/lib/lua/luci/dispatcher.lua:627: in function 'createtree'
	/usr/lib/lua/luci/dispatcher.lua:279: in function 'dispatch'
	/usr/lib/lua/luci/dispatcher.lua:144: in function </usr/lib/lua/luci/dispatcher.lua:143>

Does some pro Developer here have answers to this two questions?

3

Please check it the country code (may not be include 00) and the in package/mac80211/files/lib/wifi/mac80211.sh file comment out the line:

# REMOVE THIS LINE TO ENABLE WIFI:
    ## option disabled 1
4

Thanks @drcyberg for that posible solution. I'm looking for a solution i an commit to the automated buildsystem ans therefore this is not possible as @jeff says here.

Does the option to execute a script like described here not exist anymore?

5

Scripts in /etc/uci-defaults/ run until they succeed once, then are “deleted”. They should work properly for you, as would a custom ./files/etc/config/wireless in your build system.

6

what's the better solution to commit back to the automatic build system?

7

For now, find what solves your problem. I’ll need to reread the threads to find what that problem is.

8

As OpenWrt doesn't enable wireless or access over WAN to newly flashed devices for security reasons, you might have quite a challenge convincing the lead devs to add anything like this, especially for a dev board with easy serial access.

I would solve the problem by using a preconfigured /etc/config/wireless in my local build.

9

you wrote once
./files/etc/config/wireless
and once
/etc/config/wireless

how is that ment if my build is here: ~/openwrt/18.06/openwrt/
is it
~/openwrt/18.06/openwrt/files/etc/config/wireless
or
~/openwrt/18.06/openwrt/etc/config/wireless

and where do i reach lead devs?

10

If you look at

/etc/config/wireless

on your running device and use that as a template to create

./files/etc/config/wireless

in your build system, the content of that file on your build system will appear in your flashed image as

/etc/config/wireless

See https://openwrt.org/docs/guide-developer/build-system/use-buildsystem#custom_files

Lead devs generally follow the mailing list and occasionally can be reached on IRC https://openwrt.org/contact

11

i figured out how it realy works best:

It's not a folder called files, its a symlink in the buildroot pointing to /env/files/ and if i create the corresponding filestructure inside files, i can place any file in my device.

so for anybody looking how to create such thing as a automatic activation of wireless or any uci-command here you go:

  1. create folder <buildroot>/env/files and symlink with command:
    ln -s <buildroot>/env/files <buildroot>/files
  2. in there you can create the folder as you will later find it in the device:
    <buildroot>/files/etc/uci-default/<your_file>
    subfolders like uci-default/<some_folder>/<your_file> will be ignored.
    so my solution is this file:
    <buildroot>/files/etc/uci-default/wireless
    with this content:
#!/bin/sh
uci set wireless.@wifi-device[0].disabled=0
uci commit wireless
exit 0

_

still have to figure out 3 things:

  • to to get Wifi to not be an bridge AP because my wifi now does not have connection to Internet but gets a ip an is able to route my Laptop over his wifi to internet. (strange)

  • why i get a LUCI error when entering the IP because of a strange path /usr/lib/lua/luci/controller/arduino/index.lua (no idea what Arduino has to do here)

  • set dhcp on LAN interface