I checked the procedure (** Factory reset **) to restore the BX1 of the OpenBlocks IoT family to the factory default state. Make a note for your work.

Serial connection

Connect the BX1 and the Windows terminal with a USB-UART conversion cable, and log in to the console with terminal software such as TeraTerm that enables serial communication. The baud rate and data bit settings are as shown in the figure below.

Wi-Fi settings

BX1's Wi-Fi includes Client Mode (connects to an existing Wi-Fi network) and AP Mode (BX1 itself becomes an access point). It's the same as a general Wi-Fi router. I want to download the factory firmware, so I connect to the Internet in Client Mode.

Encrypt passphrase with PSK

`command`


wpa_passphrase [SSID] [Passphrase]

`Standard output`


network={
    ssid="[SSID]"
    #psk="[Passphrase]"
    psk=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
}

Network settings

Set the above SSID and encryption key.

`/etc/network/interfaces`


auto wlan0
iface wlan0 inet dhcp
    wpa-ssid [SSID]
    wpa-psk XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    wpa-ap-scan 1
    wpa-key_mgmt WPA-PSK
    wpa-proto WPA RSN
    wpa-pairwise CCMP TKIP
    wpa-group CCMP TKIP

NIC reboot

ifdown wlan0 && ifup wlan0

Firmware download

Plat'Home's site shows the firmware for the latest kernel of ** Intel Edison **. Since there is image data, download it.

cd /root
wget http://ftp.plathome.co.jp/pub/BX1/wheezy/3.10.17-17/bx1_userland_web1.0.14-1.tgz

Check the output of the Web UI to see which version of BX1 to download.

curl -sL localhost:880 | grep Version

Boot in ramdisk mode

The BX1 has a RAM disk mode that does not use storage and a storage combined mode that uses storage. In the display of the df command, what is mounted on /. Rw is the storage mode if it is / dev / mmcblk0p10, and the RAM disk mode if it is tmpfs.

e2label /dev/mmcblk0p10 ""
reboot

After rebooting, log in as root / root.

Format the partition where the firmware will be placed

yes | mkfs -t ext4 -L DEBIAN /dev/mmcblk0p10
sync

Development of factory shipping image

It takes about 3 minutes.

mount /dev/mmcblk0p10 /mnt
tar zxf /root/bx1_userland_web1.0.14-1.tgz -C /mnt 2> /dev/null
umount /mnt
rm -f /root/bx1_userland_web1.0.14-1.tgz

Start in storage combined mode

e2label /dev/mmcblk0p10 DEBIAN
reboot

If you can't connect to Wi-Fi

If you cannot connect to Wi-Fi from ** Debian GNU / Linux **, connect from ** Yocto Linux **, which is Intel Edison's embedded Linux.

Serially connect to the PC and perform the following operations.

Turn off the power
Hold down the INIT switch and hold down the power switch, and release the power switch when the LED flashes for a moment.

******* PSH loader *******
PCM page cache size = 192 KB
Cache Constraint = 0 Pages
Arming IPC driver ..
Adding page store pool ..
PagestoreAddr(IMR Start Address) = 0x04899000
pageStoreSize(IMR Size)          = 0x00080000

*** Ready to receive application ***

Is displayed, press the space key repeatedly, and when the boot prompt appears, enter the following command.

boot > run bootYocto

In the default low power consumption mode, the first character of the serial console may be missed, so the serial communication power is always on.

echo on > /sys/devices/pci0000:00/0000:00:04.3/power/control

Connect to existing Wi-Fi.

wpa_passphrase [SSID] [Passphrase] > /etc/wpa_supplicant/wpa_supplicant.conf
wpa_supplicant -i wlan0 -c /etc/wpa_supplicant/wpa_supplicant.conf &
udhcpc -i wlan0

[LINUX] Notes on how to restore OpenBlocks IoT to factory default