POS Printer for POS

POS Printer for printing Receipt of POS.

Printer base on ESCPOS, and write by python.

Scaner base on Python-evdev.

Quick Start

Printer

Requirements

Install python-escpos

Install printer-service

$ git clone https://github.com/guanbo/pos_printer
$ cd pos_printer
$ sudo ./pos-printer.py &
$ curl -X POST -d "Hello Printer" http://youIPAddress:8000

Bonjour

$ sudo cp extensivepromini.service /etc/avahi/services/
$ sudo /etc/init.d/avahi-daemon restart

Scaner (Deprecated)

Requirements

$ sudo apt-get install python-dev
# sudo apt-get install linux-headers-$(uname -r)
$ wget https://bitbucket.org/pypa/setuptools/raw/bootstrap/ez_setup.py -O - | sudo python

Install python-evdev

$ git clone https://github.com/gvalkov/python-evdev.git
$ cd python-evdev
$ sudo python setup.py install

Troubleshoot

• How to access server by hostname.local

$ sudo apt-get update
$ sudo apt-get install avahi-daemon
$ sudo vi /etc/hostname
# change your hostname and save

• Can't apt-get install pyserial

$ sudo apt-get install python-serial

Update

update firmware and reboot

automatic update

cron

call update script on schedule

export VISUAL=vi
crontab -e 

enter following code into cron file

@daily /home/pi/deploy/pos-printer/update-auto.sh 2>&1 >> /home/pi/deploy/pos-update.log
@yearly rm /home/pi/deploy/pos-update.log	

manual update

$ cd path/to/pos-printer
$ sh update.sh

web update

$ curl -v -X POST http://exprominisrv.local:8000/update

Backup

dump all img to disk for backup

dump image

$ diskutil umount /dev/disk1s1
$ sudo dd if=/dev/rdisk1 of=/tmp/rpi20140301.img bs=1m
$ diskutil umount /dev/disk1s1

restore image

$ diskutil umount /dev/disk1s1
$ sudo dd of=/dev/rdisk1 if=/tmp/rpi20140301.img bs=1m
$ diskutil umount /dev/disk1s1