//------------------------------------- main ---------------------------------------------------------------- int main(void) { int fd; showversion(); printf("\nGSM/GPRS TESTS\n\n"); // open seriel port fd = open(DEVICE_TTYS, O_RDWR); if (fd == -1) {
Introduction This document describes the hardware interface of the MD231 GSM/GPRS module which can be integrated with a wide range of applications. This document can help you quickly understand MD231 interface specifications, electrical and mechanic
