#This SOFTWARE is distributed is provide "AS IS" in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
#without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
#Dragos Iosub, Bucharest 2017.
#http://itbrainpower.net

Bellow are the patches applied in the "2017-01-11-rasp-jessie-lite-configured-itbp-modems.zip" image, starting from 
the original Jessie Lite image [downloaded from the https://www.raspberrypi.org/downloads/ at 2017-01-11].

1. Additional packages installed:
sudo apt-get update
sudo apt-get install ppp
sudo apt-get install python-serial
sudo apt-get install mc
sudo apt-get install mtr

2. Enable sshd & disable serial console. Made via:
sudo raspi-config 

3. Edit /etc/rc.local, add following lines, before "# Print the IP address" line:
sleep 10
/sbin/ifconfig eth0:0 192.168.122.200 up > /dev/null# supplementary static IP address 

4. Edit /boot/config.txt, and comment line "enable_uart=0", like bellow [in this way you enable the /dev/ttyAMA0 port]:
#enable_uart=0

5. In same file [/boot/config.txt] add following 3 lines[1'st. disable BLE on /dev/ttyAMA0; 2'th. enable BLE on SERIAL1; 3'th fix proper frequency to be used in conjuction with SERIAL1]:
dtoverlay=pi3-disable-bt
dtoverlay=pi3-miniuart-bt
core_freq=250

6. Disable serial getty via following two commands: 
sudo systemctl stop serial-getty@ttyAMA0.service
sudo systemctl disable serial-getty@ttyAMA0.service

7. Patch the hciuart service. Edit the SERVICE section in /lib/systemd/system/hciuart.service, like bellow [comment the original line, add the second one]:
#ExecStart=/usr/bin/hciattach /dev/serial1 bcm43xx 921600 noflow -
ExecStart=/usr/bin/hciattach /dev/serial1 bcm43xx 115200 noflow -

8. Set root password [default root passord set to 1234] 
sudo passwd

9. Enable root remote login via ssh. Edit /etc/ssh/sshd_config [Authentication section]. Comment first line, add the second one
#PermitRootLogin without-password
PermitRootLogin yes


Enjoy!