Establish PPP Network Connection on Raspberry Pi via Serial Console

16 Aug 2016

Preparations

1. Download Raspbian and install to SD card.
2. Download Debian packages:
   • libpcap0.8_1.7.4-2_armhf.deb
   • ppp_2.4.7-1+2_armhf.deb
3. Copy *.deb to SD cards boot partition.
4. Boot Raspberry Pi and connect to console: screen /dev/ttyUSB0 115200

On Raspberry Pi

1. Install packages:

   dpkg -i /boot/libpcap0.8_*.deb
   dpkg -i /boot/ppp_*.deb
   

2. Remove console=serial0,115200 from /boot/cmdline.txt.
3. Edit /etc/rc.local:

   ...
   stty -F /dev/ttyAMA0 raw
   stty -F /dev/ttyAMA0 -a
   pppd /dev/ttyAMA0 115200 10.0.0.2:10.0.0.1 noauth local debug dump defaultroute nocrtscts persist maxfail 0 holdoff 1
   exit 0
   

4. Reboot

On host

1. Run pppd:

   stty -F /dev/ttyUSB0 raw
   sudo pppd /dev/ttyUSB0 115200 10.0.0.1:10.0.0.2 proxyarp local noauth debug nodetach dump nocrtscts passive persist maxfail 0 holdoff 1 &
   

2. Enable Routing and NAT:

   sudo sysctl -w net.ipv4.ip_forward=1
   sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
   

3. Connect to Raspberry Pi via SSH: ssh pi@10.0.0.2
4. Download files from the Internet with ~12KB/s like it’s 1998.

1. http://statusorel.ru/technology/connect-the-raspberry-pi-to-network-using-uart.html