Ola amigos!

Adquirimos um módulo 3g + gps, e não conseguimos obter resposta do modulo.

Segue o comando utilizado e algumas fotos das placas.

Desde já, agradeço!

int8_t answer;
int onModulePin= 2;
char gps_data[100];
int counter;

void setup(){

pinMode(onModulePin, OUTPUT);
Serial.begin(115200);

Serial.println("Starting...");
power_on();

delay(5000);

// starts GPS session in stand alone mode
answer = sendATcommand("AT+CGPS=1,1","OK",1000);
if (answer == 0)
{
Serial.println("Error starting the GPS");
Serial.println("The code stucks here!!");
while(1);
}
}
void loop(){

answer = sendATcommand("AT+CGPSINFO","+CGPSINFO:",1000); // request info from GPS
if (answer == 1)
{

counter = 0;
do{
while(Serial.available() == 0);
gps_data[counter] = Serial.read();
counter++;
}
while(gps_data[counter - 1] != '\r');
gps_data[counter] = '\0';
if(gps_data[0] == ',')
{
Serial.println("No GPS data available");
}
else
{
Serial.print("GPS data:");
Serial.println(gps_data);
Serial.println("");
}

}
else
{
Serial.println("Error");
}

delay(5000);
}

void power_on(){

uint8_t answer=0;

// checks if the module is started
answer = sendATcommand("AT", "OK", 2000);
if (answer == 0)
{
// power on pulse
digitalWrite(onModulePin,HIGH);
delay(3000);
digitalWrite(onModulePin,LOW);

// waits for an answer from the module
while(answer == 0){
// Send AT every two seconds and wait for the answer
answer = sendATcommand("AT", "OK", 2000);
}
}

}

int8_t sendATcommand(char* ATcommand, char* expected_answer1, unsigned int timeout)
{

uint8_t x=0, answer=0;
char response[100];
unsigned long previous;

memset(response, '\0', 100); // Initialize the string

delay(100);

while( Serial.available() > 0) Serial.read(); // Clean the input buffer

Serial.println(ATcommand); // Send the AT command

x = 0;
previous = millis();

// this loop waits for the answer
do{

if(Serial.available() != 0){
response[x] = Serial.read();
x++;
// check if the desired answer is in the response of the module
if (strstr(response, expected_answer1) != NULL)
{
answer = 1;
}
}
// Waits for the asnwer with time out
}
while((answer == 0) && ((millis() - previous) < timeout));

return answer;
}