static int sim800_attach(struct cellular *modem)
{
at_set_callbacks(modem->at, &sim800_callbacks, (void *) modem);
at_set_timeout(modem->at, 2);
/* Perform autobauding. */
for (int i=0; i<SIM800_AUTOBAUD_ATTEMPTS; i++) {
const char *response = at_command(modem->at, "AT");
if (response != NULL)
/* Modem replied. Good. */
break;
}
/* Disable local echo. */
at_command(modem->at, "ATE0");
/* Disable local echo again; make sure it was disabled successfully. */
at_command_simple(modem->at, "ATE0");
/* Initialize modem. */
static const char *const init_strings[] = {
// "AT+IPR=0", /* Enable autobauding if not already enabled. */
"AT+IFC=0,0", /* Disable hardware flow control. */
"AT+CMEE=2", /* Enable extended error reporting. */
"AT+CLTS=0", /* Don't sync RTC with network time, it's broken. */
"AT+CIURC=0", /* Disable "Call Ready" URC. */
"AT&W0", /* Save configuration. */
"AT+BTSPPCFG=\"TT\",1",
"AT+BTPAIRCFG=0",
"AT+BTSPPGET=1",
"AT+BTPOWER=1",
NULL
};
for (const char *const *command=init_strings; *command; command++)
at_command_simple(modem->at, "%s", *command);
/* Configure IP application. */
// /* Switch to multiple connections mode; it's less buggy. */
// if (sim800_config(modem, "CIPMUX", "1", SIM800_CIPCFG_RETRIES) != 0)
// return -1;
// /* Receive data manually. */
// if (sim800_config(modem, "CIPRXGET", "1", SIM800_CIPCFG_RETRIES) != 0)
// return -1;
// /* Enable quick send mode. */
// if (sim800_config(modem, "CIPQSEND", "1", SIM800_CIPCFG_RETRIES) != 0)
// return -1;
return 0;
}
static int telit2_attach(struct cellular *modem)
{
at_set_callbacks(modem->at, &telit2_callbacks, (void *) modem);
at_set_timeout(modem->at, 1);
at_command(modem->at, "AT"); /* Aid autobauding. Always a good idea. */
at_command(modem->at, "ATE0"); /* Disable local echo. */
/* Initialize modem. */
static const char *const init_strings[] = {
"AT&K0", /* Disable hardware flow control. */
"AT#SELINT=2", /* Set Telit module compatibility level. */
"AT+CMEE=2", /* Enable extended error reporting. */
NULL
};
for (const char *const *command=init_strings; *command; command++)
at_command_simple(modem->at, "%s", *command);
return 0;
}
int main(int argc, char *argv[])
{
assert(argc-1 == 1);
const char *devpath = argv[1];
printf("allocating channel...\n");
struct at *at = at_alloc_unix(devpath, B115200);
printf("opening port...\n");
assert(at_open(at) == 0);
printf("attaching callbacks\n");
at_set_callbacks(at, &generic_modem_callbacks, NULL);
const char *commands[] = {
"AT",
"ATE0",
"AT+CGMR",
"AT+CGSN",
"AT+CCID",
"AT+CMEE=0",
"AT+BLAH",
"AT+CMEE=2",
"AT+BLAH",
NULL
};
printf("sending commands...\n");
at_set_timeout(at, 10);
for (const char **command=commands; *command; command++) {
const char *result = at_command(at, *command);
printf("%s => %s\n", *command, result ? result : strerror(errno));
}
printf("freeing resources...\n");
at_free(at);
return 0;
}
static int telit2_detach(struct cellular *modem)
{
at_set_callbacks(modem->at, NULL, NULL);
return 0;
}
