RICM4 2017 2018 - UltraTeamMV : UML

This page contains UltraTeamMV's UML description of the project.

It is important to better understand it to remember that UltraTeam is this year divided into two teams and that this document concerns only one of them. Hence, the server part of the whole solution will not be depicted here (for further reading about it, see the other team's UML). This page will only develop a smartphone application centered study.

One might be surprised not to encounter lots of mentions of ESP32, LoRa and BLE. We might want to recommend then to read the SRS page of the project for a more specification oriented approach.

Usecase

Use case are here divided into two parts :

• A higher level one (referred to as H), more user centered and especially understandable by the client. It will be called H.
• A lower level one (referred to as L), centered on in-solution communication, depicting how users (ESP32, smartphone) make use of the implemented protocol. It will

Graphs

H

Case details

End user → Read self geolocation on map

Pre-conditions

• Smartphone should be on, with a loaded map into the app,
• The geolocation should be stored in the app.

Start

The smartphone displays another page.

End

The smartphone displays the map page with a marker on end user's geolocation.

Normal execution

1. User clicks on "map page" in menu,
2. Smartphone loads geolocation from application,
3. Smartphone loads relevant map part,
4. Smartphone displays map,
5. Smartphone displays end user's geolocation as a marker.

Alternative executions

• If map can't be loaded or displayed, redirect to another page and display an error message,
• If geolocation can't be loaded, display a loaded map and display an error message.

Non-functional constraints

• Loading should take less than 2 seconds as it is a main feature hence frequently used,
• Map should be readable even in a non urban area (a acceptable default zoom level shall be used).

End user → Read other hikers’ geolocation on map

Pre-conditions

• Smartphone should be on, with a loaded map into the app
• Other hikers’ geolocation should be stored in the app

Start

The smartphone displays another page.

End

The smartphone displays the map page with a marker on every other hikers’ geolocation.

Normal execution

1. User clicks on "map page" in menu,
2. Smartphone loads other hikers’ geolocation from application,
3. Smartphone loads relevant map part,
4. Smartphone displays map,
5. Smartphone displays other hikers’ geolocation as a marker,
6. User scrolls map → smartphone restarts loading and displaying steps.

Alternative execution

• If map can't be loaded or displayed, redirect to another page and display an error message
• If an other hikers’ geolocation can't be loaded or displayed, proceed as if it did not exists

Non-functional constraints

• Loading should take less than 2 seconds as it is a main feature hence frequently used,
• Map should be readable even in a non urban area (a acceptable default zoom level shall be used).

End user → Read specific hiker's geolocation on map

Pre-condition

• Smartphone should be on, with a loaded map into the app
• The other hiker’s geolocation should be stored in the app
• The UI should be on map page

Start

The smartphone does not display anything, the page is blank.

End

The smartphone displays the map centered on a marker displaying other hiker’s geolocation

Normal execution

1. Smartphone loads specific hiker’s geolocation from application
2. Smartphone loads map
3. Smartphone displays map centered on
4. Smartphone displays other hikers’ geolocation as a marker

Alternative execution

• If map can't be loaded or displayed, redirect to another page and display an error message
• If an other hikers’ geolocation can't be loaded or displayed, proceed as if it did not exists

Non-functional constraint

• Loading should take less than 2 seconds as it is a main feature hence frequently used.
• Map should be readable even in a non urban area (a acceptable default zoom level shall be used).

End user → Create a course

Pre-condition

• Application is launched on home page.

Start

Course does not exist.

End

A course was created. Application generated an AES encryption key.

Normal execution

1. User clicks on "Create course"
2. AES encryption key is generated
3. A QRCode is displayed on screen or smartphone starts to send data via NFC

Alternative execution

• If something goes wrong, smartphone should display a "cancel | recreate course" button

Non-functional constraint

• Course should be under 10 seconds
• Smartphone display should be large and bright enough for other users to flash it or smartphone should be equipped of an NFC chip

End user → Join a course

Pre-condition

• Another physically near user shall have created a course,
• Application is launched on home page.

Start

End user is not enrolled in the given course.

End

End user is enrolled in the given course.

Normal execution

1. Users clicks on "Join course" button,
2. Users clicks on "Via QRCode" or "Via NFC" button,
3. Camera opens or NFC starts to listen, and code is received,
4. Received code is stored into the application.

Alternative execution

• If nothing is received in a given time, display a help message

End user → Display connected devices list

Pre-condition

• Smartphone is on and on "display devices" page

Start

The page is blank.

End

The page is filled with connected (or not) devices information.

Normal execution

1. Smartphone sniffs connected devices and their relevant info,
2. Smartphone displays those information.

End user → Send a distress state signal

Start

User is in a distress state. Only him knows about it.

End

User is in a distress state. The smartphone or ESP32 is aware of this situation.

Normal execution

1. User clicks on ESP's button or Smartphone SOS button

Non-functional constraint

• User should be physically able to click button

Administrator → Update application

Pre-condition

• Administrator is able to push version to user's smartphone.

Start

Application version is at level X on user's smartphone.

End

Application version is at level Y with Y > X on user's smartphone.

Normal execution

1. Administrator detects a possible enhancement in application (debug, new feature,...),
2. Administrator develops this enhancement,
3. Administrator sends new version to end user,
4. User updates application.

Non-functional constraint

• Update should be as transparent to user as possible,
• Bugfixes should be done as fast as possible,
• New version should allow retro-compatibility.

---

ESP32 BLE connection establishment with smartphone

Pre-condition

• ESP32 & Smartphone are on, with BLE running,
• ESP32 & Smartphone are near enough to communicate via BLE.

Start

ESP32 and smartphone are disconnected.

End

ESP32 and smartphone are connected via BLE.

Normal execution

1. User pairs devices via its smartphone's OS settings, as any other BLE device.

Non-functional constraint

• BLE on ESP32 & on smartphone should be technologically able to communicate

Distress signal transmission from ESP32 to smartphone via BLE

Pre-condition

• ESP32 & Smartphone should be connected via BLE,
• The end user has generated a distress signal on its ESP.

Start

ESP32 is aware of a user distress state. Smartphone is not aware of this situation.

End

Both ESP32 and smartphone are aware of a user distress state.

Normal execution

1. ESP32 sends a BLE packet to smartphone to inform it of distress state.

Distress signal transfer from another ESP32 to smartphone via BLE

Pre-condition

• ESP32 & Smartphone should be connected via BLE
• Another ESP32 sent a distress signal

Start

ESP32 is aware of another user's distress state.

End

Both smartphone and ESP32 are aware of the other user's distress state.

Normal execution

1. ESP32 receives signal, detects that it is a distress,
2. ESP32 sends a BLE packet to smartphone to inform it of distress state.

Geolocation information sending by ESP32 via LoRa

Pre-condition

• ESP32 is on and has a geolocation information to send.

Start

∅

End

The geolocation information was sent by LoRa.

Normal execution

1. ESP32 sends a LoRa packet containing geolocation information, by broadcast.

Non-functional constraint

• ESP can not talk more than 1% of the time via LoRa.

Geolocation signal forward from another ESP32 to smartphone via BLE

Pre-condition

• ESP32 & smartphone are connected.

Start

ESP32 is aware of a geolocation information received from another ESP32 via LoRa;

End

Smartphone is aware of this information.

Normal execution

1. ESP32 parses received geolocation signal.
2. ESP32 sends BLE packet to smartphone.
3. Smartphone parses received packet.
4. Smartphone adds given information to its database.

Distress signal transfer from another ESP32 to broadcast via LoRa

Start

ESP32 is aware of a distress signal.

End

A distress signal was sent by broadcast via LoRa.

Normal execution

1. ESP32 parses a received LoRa distress signal.
2. ESP32 sends a LoRa packet in broadcast with same data.

Non-functional constraint

• ESP can not talk more than 1% of the time via LoRa.

Template

Pre-condition

Start

End

Normal execution

Alternative execution

Non-functional constraint

[Suggestions :]

• Time
• Cost
• Direct environment constraints (physical environment, connections, interfaces, safety, testability, deployment...)
• Indirect environment constraints : PESTLE analysis (Political, Economic, Social, Technological, Environmental, Legal)