USB GSM modem (Siemens TC35i) interface with PIC18F4550

[DDDD]

Hi all ,

 

I am doing project on PIC18F4550 with USB GSM modem(Siemens TC35i) using RS232 serial port and PC.

That is all i have this USB GSM modem.

 

 

– controlling the 8 relays turning on/off via sending SMS from my phone to USB GSM modem

 

 

My first problem is how to connect USB GSM Modem with PIC18F4550.

 

 

 

Does this connect is correct or wrong?

 

USB GSM modem <—> USB to RS232 converter <—> PIC18F4550

 

 

 

 

 

I need immediate help in writing the code in C. I’m currently using PIC CCS C Compiler. 

  

                           pls, pls, pls help me…

 

 

[AJISH ALFRED]

That connectio is correct. Could you please tell us why you need this connection connect the PC<—>usb<—>PIC

[Author]

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