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Changes
→Connect to Network via GSM
serial_init(fd);<br>
<br>
printf("************************************************\n");<br>
printf("\tWelcome to OrangePi 2G-IoT\n");<br>
printf("\tModem version %s\n", VERSION);<br>
printf("************************************************\n");<br>
printf("Entry your select:\n");<br>
printf("1. Send Message\n");<br>