sim300 INTERFACING WITH ARM

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A.Rashad

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I need to interface sim300 to ARM lpc2148, sIM300 gsm MODEM is working fine on hyperterminal , but as soon as I connect Tx RX of lpc2148 to Tx Rx of Modem , Its not working, means simultaneously I have connected RS232 cable to GSM modem, I am not able to see any response or command from ARM to Modem on Hyperterminal..
 

U have to connect a RS232 RX to LPC TX, And RX232 TX to LPC RX
Bettre try it like this.....
LAst time i also made this king=d of mistakes.

- - - Updated - - -

U have to connect a RS232 RX to LPC TX, And RX232 TX to LPC RX
Bettre try it like this.....
LAst time i also made this kind of mistakes.
 

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