When using the response codes method, you only have to wait for a single string from the modem. The disadvantage of this method is that you have to query for the status multiple times until the receiver picks up the line. Using the query method, you can be sure that your code will work on any mobile, because you can use standardized AT commands (ETSI GSM 07.07)to do this. Dialing the number itself is very easy, but you probably want to know Basics of automating outgoing phone calls using a GSM modem and a computer DialingĪutomating outgoing calls is not a simple matter.
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