Help me in the FBUS protocol

Hello, My present project is with the Message transmitting with the Nokia 3310 and the 8052 microcontroller. I followed the protocol there in the "www.embeddedtronics.com"
but i am not getting it.

Pls help me it is urgent

what part you did not understand? please be clear with it..

Posting in another thread will not help.

Saying "but i am not getting it" will not help either.

You need to say exactly what you have done,
and what, if anything does work.

Once we know that someone may be able to help.
You can never give too much detail when asking for help.

I know it may not be my place to comment..
but I thought it needed saying and the mods may be too polite to say it

Thanks sir,
The msg receiving has been completed. But the Msg transmitting i am not getting.
I followed the frame which is there in the 'embeddedtronics.com'.

1. First i transmitted the Software version request to the phone, then i have received the version.

2. Next I framed a msg to transmit as follows


char RData1[]={0x1E,0x00,0x0C,0x02,0x00,0x32,0x00,0x01,0x00,0x01,
0x02,0x00,0x07,0x91,0x19,0x89,0x58,0x00,0x45,0x44, //MSC no
0x00,0x00,0x00,0x00,0x15,0x00,0x00,0x00,0x04,0x0C, 0x91,0x19,0x99,0x98,0x62,0x13,0x62,0x00,0x00,0x00, //MOB no
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC7,0xB4, 0x3C,0x0D,0x01,0x00,0x43,0x00,0x7A,0x52};

Here the Msg Centre No: 988500544
and Mobile no is: 9989263126
and msg is: Giri

thanks

Now that's much better
Sorry if my earlier post seemed a bit harsh.

Did you send an acknowledge frame back to the phone to
acknowledge the version info it sent you,
before moving on to item 2
"2. Next I framed a msg to transmit as follows"


Can you send other commands to the phone and get the right answer ?

It's always a good idea to try simple things first to be sure your
setup works.

The URL is
http://www.embedtronics.com/nokia/fbus.html

did you convert the msg to pdu format? to check if you have done right or wrong, download pdu converter utility from download section -> vb projects.

Now i just want to ask you few question:

how did you calculate the block/frame length?
i found the count for destination mobile number is not appropriate, i.e. you are using 0C where as it is 0A, did you check it?
padding byte needed or not?
checksum calculation may change after above changes.

Hello Sir,

The mobile number length is 0x0A in website, but when i m receiving msg there i found it as 0x0c so that i have used the 0C.

Yes, i have forwarded the ack frame also, and my PDU conversion is also currect.

as the total frame length is odd it needs a padding byte (i.e 0x00 in my frame).

One doubt is the order of checksums is even, odd or odd,even????

Is there any exact command manual for the FBUS, if it is there let me know about it.

Otherwise I will forward the code so that let me know the corrections.

You do realise you must calculate your own the checksum for each message.


I think your data size should be 31 not 32 as padding byte don't seem to count as data.
If you change to 31 then I think your checksum should be 0xb3,0x48 instead of 0x7a, 0x52

"One doubt is the order of checksums is even, odd or odd,even????"
Here 0xb3 comes XOR ing bytes 0,2,4,6 etc and 0x48 from bytes 1,3,5,7 etc

I could easily be wrong, but it's worth a try



"Is there any exact command manual for the FBUS, if it is there let me know about it."
No, just lists complied from what has been seen to work. Google FBUS

Thanks,
I will try with your suggestions and i will get back to you

if you want complete info on FBUS, visit www.gnokii.org check out the protocol information in www interface to their CVS server.

If you want working example of FBUS packet then use softwares like oxygen or some PC suit kind of software to send sms and use a serial monitor software to see it..