http://gtataranni.github.io/remote-access/
University project for MobServ class at Eurecom.
The purpose of the project is to build a chatbot application that allows to send remote commands between Android devices, having one (or more) of them onboard on drones. The server is a simple chat server in Python/Twisted, and the client is an Android app that sends/receives messages and performs actions described there.
In order to use the application, download the code and compile it using Android Studio.
For the server, python and the Twisted protocol are required. To launch the server use command
$ python server.py
When the server is up and running it will show the ip address to insert in the application.
In order to use the application you need to run the server. The server will provide you with an ip address, which you need to insert into the first page of the app and click connect to server. Once you are connected you can choose a name, if you choose a name already taken you will be asked to provide a different one. If you do not choose a name, the first thing you write in the application will be your name.
Now you can start sending requests, request for periodic messages or provide your own GPS position.
This is done by first selecting the name of the device you would like to communicate with, or choosing all in order to broadcast. After doing this you will be provided with the option of sending a request, recuesting for periodic messages or send your own GPS position. When you for example choose to send a request, options on what you can request will appear. When the only option that remains is ;, your message is ready to be send and you click SEND, do not include ; before SEND.
You can also add more actions to your message by adding ; an action message. After choosing ; you continue as explained over, starting by selecting a device which will recive the action.
When you click SEND your request will be sent through the server to the devise you choose and you will recive a response with the data you requested.
The syntaxt of the messages beeing sent over the server is of the form
/recipient_user/command/action/params/moreparams
The recipient_user field is used for the username of the user the command is beeing sent to. recipient_user can also be set to all in case of broadcast.
The command field is used for commands, like requests (Req), responses or execute (Exec).
The action field is used for the specific action of the command. E.g. Gps, Photo, Live stream or Network.
The params and moreparams field is used for any parameters that the action migth need. This field will be specific for every different action.
The server forward the message m by sending “< sendername >, m” to the recipient, where sendername is the name of the message sender.
Examples of messages:
/user1/req/photo```
Here user3 requests a photo from user1
```< server >
/all/resp/clientlist/2/user1/user3```
Here the server broadcast the clientlist
### Features
##### Already implemented
Supported features so far are
- Properly connect/disconnect from the server
- Proper interpretation of server messages
- Easy message composability/suggestions
- List of connected users
- Ask/send GPS coordinates in plaintext
- Show received GPS position on a map
- Send GPS position through clicking on a map
- Ask/Send pictures to/from other clients
- Save received pictures to memory
- Save received pictures in app gallery
- Stream video
- Log activity to file
##### Ideas on features that can be added
A potential new feature that can be implemented is the ability to interact with the drone API. Making it possible to control the drone with your android device, sending commands for it to e.g. move left, right, up, down, etc. There is also a possibility to implement the possibility to send a position by clicking on the map, making the drone fly to the given position.
Another feature that can be added include event-based subscription for batch commands.
There is also the possibility to implement a request for data from various sensors, e.g. a humidity or temperature sensor connected to the application. You will then be able to monitor the environment where the sensors are located, if the sensors allow it, it is possible to implement a command to change e.g. the temperature.
##### How to implement new features
In order to implement new features you just need to add a new case in the switch case for `messageIsReq()` and `messageIsResp()`. If you want to implement a new feature which need to deal with the GUI, you need to add a callback and implement it in the activity in charge of the GUI.
If you want to, you can also rewrite the GUI. You do this by rewriting the class ChatActivity.
### License
Apache License, Version 2.0, January 2004
http://www.apache.org/licenses/
### Support
If you are having issues, please let us know by posting an issue on this github page.
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