I'm developing an SMS application using a third-party API (JSMS) to connect to my GSM Phone (Nokia 3310) via Serial Cable (COM1). The JSMS API is using AT command to send and receive the SMS.
I found that the application is able to connect to the COM port, but failed to send the AT command. Does anybody encounter this problem before? Is it caused by the incompatibility of the phone?
Thanx in advance.