I’ve written a SPP client-server program (I mean a program that serves both of client and server chat application) by Java Me in NetBeans. It works in emulator perfectly. But when I launch it on a phone, it doesn’t work.
In my program, the application searches remote devices and add them without searching services. For making the connection, the application makes the URL based on the remote address and a channel, for example: “btspp://001B3372D6A5:3”.
As I mentioned, in emulator, the application finds the remote devices, sends a text to the selected device as the client part of the app, and waits for the receiving data as the server part of the app; it works perfectly.
But on the phone (Nokia 5800 XpressMusic and Nokia 3110c) the story is different. These steps happen and at the end, no data is transferred:
1- After running the application, the phone asks whether the user want to turn on the Bluetooth: is there any way to turn on the Bluetooth programmatically without asking a confirmation?
2- Next, it phone asks for the confirmation to java making a connection: is there any way to make a connection without asking the confirmation?
3- It finds the visible devices. After selecting a device (Nokia 3110c), the app shows the friendly name and the address of the remote and local device. But when the client wants to send a text these steps happen:
4- The server phone asking for the accepting the serial port connection: any way to bypass this question?
5- After accept, the server phone asks to generate a password: how can I manage it to ask for a password or not?
6- After generating, client phone prompts “Accept pairing request from Nokia 3110c?” and then the client phone asking the password: why pairing? How to bypass this question?
7- At the end, by the inserting the password, no data is transferred. What is the problem?
In addition, how can I solve these problems:
1- When I want to install the application, the phone prompts this application is untrusted and can be harmful for your mobile phone and asks for the confirmation.
2- Is there any specified SPP channel? And if there is, is it different in various phones? If yes, how the application can detect the number of the remote device SPP channel?
3- How to use AT commands?
I would appreciate your help to solve the above questions.
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