Introduction
Inside the Meditech architecture the platform RPImaster is the deviced that has the main role of server coordinating the system of probes, storing data, streaming and more. In few word the RPImaster device will assolve the following tasks:
- Bridging between the internal network and the external internet connection
- Apache web server with http and https protocols implementing the php support
- MySQL database server
- Unique exit point to the WiFi access point
- High level probes using the Bitscope Micro in inverted mode
- Handle microscope inspection camera
Based on the Qt 5.3 environment the RPImaster unit will include also the custom User Interface, with the option of many simplifications and a more ergonomic usage
An important change in the UI strategy
(more details on the UI design and features, based on Qt5, will be discussed in further documents)
The successfully adoption of the Qt 5.3 environment installed in the device got the option to improve the original UI design strategy. As a matter of fact this means that instead of an external tablet dedicated to acquire the visual information from the Meditech unit, showing them to the local operator and eventually when needed sending them to a remote support unit has been eliminated: At this point any mobile Android device will be useful for the remote connection sharing its internet connection.
Production costs reduction
The choice of the Qt 5.3 version has been conditioned by the availability of all the libraries needed to assemble a well working environment that has demonstrated to be stable and very well responsive. Due the relatively limited resources of the Raspberry PI and other factors has conditioned the choice to use the Qt C++ bare environment also for the UI graphic design.
This change has also a positive impact on the costs:
- Can be used any mobile device as the only granted feature should be Internet tethering (WiFi to 3G/4G)
- Can be used any available WiFi access point
- The average cost of a Android tablet (about 150$-200$) is replaced by a HDMI or - in the cheaper case - a LCD AV device
Data exchange security improvement
The RPImaster device will comunicate P2P with the remote assistance unit with a set of tools provided by another Meditech dvice with some modifications. The secured communication between the two units Through the Internet gives a lot of options to better secure the communication protocol while exchanging sensitive data (patient information, data analysis, location information etc.)
Qt 5.3 testing
The following video shows some calculation and graphic tests of Qt 5.3 C++ sample applications running on the Raspberry PI 2
