This adds the hw_screen module which is responsible for receiving
rendered HTML from a POS client and sending it to a running Chromium
browser. This is done by sending Remote Debugging Protocol messages over
a WebSocket provided by Chromium. This allows hw_screen to evaluate
arbitrary JS. This is used to seamlessly (without flickering) update the
browser.
This also includes changes to the POSBox. X, Chromium and some
miscellaneous other programs were added. Functionality was added that
automatically displays a fullscreen, UI-less Chromium browser when the
POSBox starts up. This is accomplished through x_application.sh, which
gets executed only when a display is detected. After the browser starts,
it will display a specific screen until it receives the first order update
from a POS client.
Creates a public controller to be able to display the interface on an external
device not connected to the posbox (e.g. tablet)
Courtesy of JOV, LPE, ODO and MAT
- ngrok download URL has changed
- default kernel for raspbian image has changed and needs to match
- remove pre-existing git checkout to avoid conflicting
- wait a few seconds after setting up loop dev with kpartx to access image
contents - sometimes required to let the device appear in /dev
The main reason for doing this is supporting the new Raspberry Pi 3. No
functional changes where made.
For Raspbian Wheezy we used to download the full image and strip it as
best we could to obtain a reasonable image size for people to
download. Since Raspbian Jessie the Raspberry Pi Foundation has started
releasing an official minimal image (Raspbian Jessie Lite) which we will
use from now on to build our image. One downside of this is that the
minimal image is a 1.3 GiB image which is too small for our
purposes so it has to be resized.
Because Raspbian Jessie migrated to systemd we cannot rely on
/etc/init.d/rcS to set up the ramdisks anymore. Jessie provides a
compatibility layer so old SysVinit scripts still work but rcS does not
block like it does in a SysVinit system, it is run in parallel with
other startup services. In our case this is a bad thing as setting up
the ramdisks has to be done before any other services are started. To
accomplish this the rcS hack has been migrated to a systemd service
running before basic.target and with DefaultDependencies=no. This has a
similar effect as the rcS hack because normal systemd services (with
DefaultDependencies=yes) all require basic.target by default.
Sometimes it's useful to ssh into a posbox to quickly troubleshoot an
issue. Talking customers through port forwarding is very difficult
however. We use ngrok to solve this issue.
This implements an interface that allows a user to enter an ngrok
authentication token. After this, ngrok can be started and we should be
able to remotely connect.
Note that ngrok does NOT run by default on the posbox. It can only be
started manually by the user.
This allows people to connect the posbox to networks using a wireless
network adapter.
When plugging in a USB Wi-Fi adapter and no network cable, the posbox
will boot and host its own Access Point called "Posbox". Users can
connect their device to this network and can then connect to the posbox
the usual way.
An interface for has been provided that also allows users to instruct
the posbox to connect to a different Wi-Fi network. This is useful when
the client is not running Odoo locally.
It is also possible to make this configuration persistent. With a
persistent Wi-Fi network configuration, the posbox will always try to
connect to the specified network after a reboot.
Attempts have been made to make the Wi-Fi connection as robust as
possible. Upon connection loss, the posbox will automatically attempt to
reconnect.
- don't add comments in posbox ld.so.preload, it causes the second line to be
interpreted as a library.
- allow image creation in headless environment. This checks whether or not X is
running and runs qemu-system-arm with or without graphics.
Instead of continuing to build upon the old images, these scripts
implement a reproducable way to generate new posbox images. The
generated images will be based on the latest stable Raspbian
release. The image will be created with the help of qemu-system-arm,
which will boot up the image and execute a script that will set up the
posbox image.
This way everything necessary to set up a posbox is readable in the
scripts and accompanying files, instead of being hidden in an image.
Lucas Perais
Olivier Dony
Joren Van Onder