Bluetooth problems for voting system using J2ME

By izzahmeor ·
I am now on a project developing an application for mobile devices. A java based voting system through bluetooth. So, i am fully utilized the J2ME and the bluetooth technology. Both Server and Clients are using mobile devices - j2me.

Upon developing the system, i faced some problems that urgently need to be solved. The problems are:

1)As a SERVER, it can only RECEIVE...and as a CLIENT, it can only SENDING. How I can make the SERVER to RECEIVE (eg:receive voters' database, voters' voting) and also SEND(eg: send questions and other notifications to clients)..?? And same goes to CLIENT. How I can make it to be able to SEND (database and votes) and RECEIVE(questions)..??

2)How I can make the Server to find the list of Clients first before they can start to communicate (sending+receiving)..??

3)As for current system, I can only make the Admin to be Server/Client.. How I can make voters (other than log in as Admin) to be Client..??

4) When in Synchronize page, after select "OK" for the first time (Bluetooth connection on and server+client communicate), then the application hang and i have to restart it back. How it can be solved...???

5)Before the Server and Client can start to communicate, how I can improve on the security part by providing password before it starts communicate?

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