by wayne » Sat Dec 08, 2012 4:11 pm
i can making call !!! but cant send sms. am i wrote a wrong AT commend? AT+CSCA=+601xxxxxxxx <my phone number> then AT+CMGS=01xxxxxxxx <target num>. i already ensure the jumper connecting T0 and T1, and GSM is successfully connected the sim card. even i had try to press small letter of 'z', it still error. Then at the hyperterminal setting baud rate=9600, 8 bit,none parity,none flow control,one stop bit. i totally following the instruction provided by cytron, i had no way to solve this problem. is this product got some problem? i just purchase this last 4 days only.