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Arduino Yun and Dragino Yun Shield

There are 3 types of applications that Room software suits very well and which require none or more or less advanced electronics knowledge (IoT, Raspberry Pi or Arduino):

  1. Default passwords
  2. Reboot and reset
  3. Recover broken Bridge (bridge.py)
  4. Upgrade linino (OpenWRT) not recommended
  5. Install SD card
  6. Install pip (SD card required)

1. Default passwords

  • arduino
  • doghunter
  • dragino

2. Reboot and reset

Relaunch sketch:

$ /usr/bin/reset-mcu
$ mcu-reset
$ reset-mcu

Reboot:

$ /sbin/reboot -n -f
$ reboot -n -f

Reset to factory settings:

$ reset-to-factory-anyway
$ reboot

3. Recover broken Bridge (bridge.py)

bridge.py must be running, test:

Using username "root".


BusyBox v1.19.4 (2015-01-06 10:25:28 CST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

 ____  ____      _    ____ ___ _   _  ___
|  _ \|  _ \    / \  / ___|_ _| \ | |/ _ \
| | | | |_) |  / _ \| |  _ | ||  \| | | | |
| |_| |  _ <  / ___ \ |_| || || |\  | |_| |
|____/|_| \_\/_/   \_\____|___|_| \_|\___/

W i F i, L i n u x, M C U, E m b e d d e d

Model: Dragino v2
Version: Dragino-v2 common-2.0.7
Build Tue Nov 24 19:39:50 CST 2015

www.dragino.com
----------------------------------------------------

root@dragino-18333d:~# ps | grep .py
 1593 root       796 S    /usr/sbin/thd --socket /tmp/triggerhappy.socket --tr
15854 root      1496 S    grep .py
28578 root      5844 S    python -u bridge.py
root@dragino-18333d:~#

If bridge.py is broken (not running), reinstall cpu-mcu-bridge package:

$ opkg install --force-reinstall cpu-mcu-bridge

4. Upgrade linino (OpenWRT) not recommended

DON'T DO UPGRADE because python/python-mini won't have enough free space even with 4.3M available.

Upgrade linino:

$ opkg list-upgradable | awk -F ' - ' '{print $1}' | xargs opkg upgrade

5. Install SD card

Install SD card:

opkg update
opkg install e2fsprogs mkdosfs fdisk rsync
;clears partition table
dd if=/dev/zero of=/dev/sda bs=4096 count=10
fdisk /dev/sda -> n, p 1, +500M,; w
umount twice with:
   umount /dev/sda?
   rm -rf /mnt/sda?
fdisk /dev/sda -> n, p 2, all available; w
umount twice with:
umount /dev/sda?
   rm -rf /mnt/sda?
   mkfs.vfat /dev/sda1
mkfs.ext4 /dev/sda2
reboot (very long > 5 min, building overlay I guess)
unpower, repower...
overlay is done, linino is resetted (old password back):
   df -h
   Filesystem                Size      Used Available Use% Mounted on
   rootfs                   14.3G    343.9M     13.2G   2% /
   /dev/root                 9.8M      9.8M         0 100% /rom
   tmpfs                    29.9M    120.0K     29.7M   0% /tmp
   tmpfs                   512.0K         0    512.0K   0% /dev
   /dev/sda2                14.3G    343.9M     13.2G   2% /overlay
   overlayfs:/overlay       14.3G    343.9M     13.2G   2% /
   /dev/sda1               499.7M         0    499.7M   0% /mnt/sda1

6. Install pip (SD card required)

Install pip (SD card required):

opkg update  
opkg install distribute  
opkg install python-openssl  
easy_install pip
pip install crcmod
pip install trollius

Make Python code run much faster by pre-compiling python py modules into pyc, to compile all python modules into pyc issue this command:

python -m compileall

Not tested yet: Python3 on OpenWrt: Python is part of the package feeds, so you need to make sure you have the Packages feed configured in feeds.conf or feeds.conf.default:

src-git packages https://github.com/openwrt/packages.git

And then:

cd <your-openwrt-folder>
./scripts/feeds update packages 
./scripts/feeds install python <or python3 if you want that too>

Author

Faure Systems (Oct 9th, 2019)