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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <gpio.h>
#include <serial.h>
int main() {
char *commandList[] = {"AT", "ATI", "AT+COPS?", "AT+COPS=?"},
serialFilePath[] = "/dev/serial0", *output;
int serialPort, moduleStatus;
unsigned long idx;
time_t pwrKeyTime;
moduleStatus = checkPinVal(27);
if (0 > moduleStatus) {
printf("Error checkPinVal()\n");
return 1;
} else if (moduleStatus == 0) {
printf("Module is off\nPowering on\n");
if (0 != modemPowerToggle(17)) {
printf("Error toggling modem power\n");
return 1;
}
pwrKeyTime = time(NULL);
while (!checkPinVal(27)) {
sleep(1);
if (time(NULL) - pwrKeyTime > 10) {
printf("Modem power on takes longer than 10s\nAborting\n");
return 1;
}
}
}
serialPort = openSerialPort(serialFilePath);
if (serialPort < 0) {
printf("Error openSerialPort()\n");
return 1;
}
output = malloc(1);
for (idx = 0; idx < sizeof(commandList) / sizeof(*commandList); idx++) {
if (0 != querySerialPort(&output, serialPort, commandList[idx])) {
printf("Error querySerialPort()\n");
close(serialPort);
free(output);
return 1;
}
printf("%s\n", output);
}
close(serialPort);
free(output);
return 0;
}
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