4G Raspbery pi router with usefull info displayed on oled display using: nodejs, docker, archlinux and some magic :). isnpired by

4G modem

• zte unlock code

MF 825

• telnet it
  • telnet 192.168.0.1
  • Login: root
  • Pwd: zte9x15
• links
  • https://wiki.archlinux.org/index.php/ZTE_MF_823_(Megafon_M100-3)_4G_Modem
  • https://www.development-cycle.com/2017/04/27/zte-mf823-inside/
  • detect i2c led and get id https://www.raspberrypi.org/forums/viewtopic.php?t=26784
  • https://www.rbit.at/wordpress/modem-router/zte-mf831-auf-modembetrieb-umstellen/
  • https://archlinuxarm.org/platforms/armv6/raspberry-pi

MF 831

• links
  • https://4pda.ru/forum/index.php?showtopic=555876&st=1400
  • https://technicalexperiments.wordpress.com/2015/10/30/zte-mf831-for-use-with-openwrt-serial-modem-instead-of-cdc_ether/
  • https://www.rbit.at/wordpress/uncategorized/zte-modem-mf831-telnet-ssh-zugang/

Screen - SSD1351

Links

• rm-hull/luma.oled#174
• https://www.waveshare.com/w/upload/5/5b/1.5inch_RGB_OLED_Module_User_Manual_EN.pdf
• https://www.raspberrypi-spy.co.uk/wp-content/uploads/2012/06/Raspberry-Pi-GPIO-Layout-Model-B-Plus-rotated-2700x900.png
• https://www.freetronics.com.au/pages/oled128-quickstart-guide-raspberry-pi
• https://gitlab.com/ftmazzone/ssd1351
• https://github.com/GoogleChrome/puppeteer/blob/v1.17.0/docs/api.md#browsernewpage

Wiring

SSD1351 pin	RPi pin	RPi func
VCC	2	5V
GND	6	GND
DC	18	GPIO24
DIN	19	GPIO10(SPI0_MOSI)
RST	22	GPIO25
CLK	23	GPIO11(SPI0_SCLK)
CS	24	GPIO8(SPI0_CEO_N)

Docker

• enable memory limit in containers: append this to /boot/cmdline.txt cgroup_enable=memory cgroup_memory=1
• https://stackoverflow.com/questions/40265984/i2c-inside-a-docker-container

back up

• make: sudo dd bs=4M if=/dev/mmcblk0 status=progress | gzip > /home/your_username/today.gz
• unmake: sudo gzip -dc /home/your_username/image.gz | dd bs=4M of=/dev/mmcblk0 status=progress