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Connecting a mobile to a microcontroller using an FBUS

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advy

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i want to connect a mobile to a microcontroller using an fbus for our project...its baud rate requirement is 115200bps....is it necessary to use PIC micro controller or can i do the above using some other microcontroller based on 8051...also what is the distinct advantage of using a PIC over other micro controllers in terms of serial data transfer..


thank you..
 

Re: urgent

115200 bps is maximum baudrate for FBUS, its doesn't mean its baud rate requirement is 115200bps, you can run FBUS on 9600 bps!

You can use any uC which has UART to control cell phone
 

    advy

    Points: 2
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Re: urgent

advy mail me:
thank you for the reply...also i have a doubt that whether the microcontroller will receive the message sent to the mobile on its pins directly after connecting or we have to request the 3310 to send the message...

uC-3310 communication is done with AT Command, uC have to ask 3310 to transfer received message to uC.
Please tak a look at
AT Command Set For Nokia GSM And WCDMA Products v1.2 English to understand what AT Command is.

i have seen the embeddtronics webpage but still have a doubt rearding this...also can u tell why we send 'U' 128 times for syncronisation.
I don't know what do you mean with send 'U' 128 times... Please tell me what is the URL of embeddtronics webpage you mentioned
 

Re: urgent

hi
here the sample for u i hope it can help u to solve ur problam


thank
buntheun
 
urgent

**broken link removed** this is the website i was referring to previously/
 

Re: urgent

Do you mean this?
The next step is to synchronize the UART in the phone with your PC or microcontroller. This is done by sending a string of 0x55 or 'U' 128 times. Simple! The bus is now ready to be used for sending frames.

That is a optional process, you can ignore it
 

urgent

Hey thanks i will try that...i wanted to know that can i use a voltage

divider circuit to reduce the microcontroller voltage output from 5 to

3.3 V by a voltage divider circuit ?or is it necessary to use

Fbus..Also are AT commands supported by all the Nokia phones including

3310 as the way i understand its for higher Models in NOKIA..

I am having some problems in the circuit for IR transmission and

reception.I have designed the 555 Timer for 38KHz but the o/p doesnot

go to 0V when a object is detected,rather the voltage drops to just

about 3.8V...i am not able to find what the problem is...i am using a 5

V regulator also...

Can u also tell me how can i download stuff i need as i have no points

Thanks Again
 

Re: urgent

i wanted to know that can i use a voltage divider circuit to reduce the microcontroller voltage output from 5 to 3.3 V by a voltage divider circuit ?
Please take a look at this discussion : :arrow:

or is it necessary to use Fbus..
What do you mean?

Also are AT commands supported by all the Nokia phones including 3310 as the way i understand its for higher Models in NOKIA..
AT Command for SMS is a standard set of AT Command, that command is same for all brand of GMS cellphone!

I am having some problems in the circuit for IR transmission and reception.I have designed the 555 Timer for 38KHz but the o/p doesnot go to 0V when a object is detected,rather the voltage drops to just about 3.8V...i am not able to find what the problem is...i am using a 5 V regulator also...
Show your circuit

Can u also tell me how can i download stuff i need as i have no points
How much point do you need, I donate it to you
 

Re: urgent

this is the circuit by which i am generating the 38Khz frequency for ir emitter...but i don't know where i am going wrong...the detector senses the voltage drop but only to 3.8V...its output is never 0 even when emitter is aligned to the receiver...i am using 7805 voltage regulator for both emitter and detector with different power supply...should i give timer output to receiver also?
 

urgent

i have connected the fbus tothe computer using serial port and the other end is Nokia 3310..i tried connecting via Windows Hyper Terminal...But the mobile does not respond when i give "AT" in main window.i tried some other commands as well but i don't get any output...i checked using portmon software(sniffer) it gives writing successful but reading failed...what should i do...which other software can i use for interaction and where can i get it..
 

Re: urgent

i have connected the fbus tothe computer using serial port and the other end is Nokia 3310..i tried connecting via Windows Hyper Terminal.
How do you connect 3310 to PC?

Try this one
23_1166413467.jpg

Note : ignore MBUS from above circuit
 

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