Dragonfly MTQ-LAT3 TCP sample code issue

[kevinpei2001@gmail.com]

I used online compiler and compiled TCP sample code for Dragonfly MTQ-LAT3 modem.
When I used screen in Ubuntu and check /dev/ttyACM0 I found it continued showing “radio not registered”. It seems it stuck around very beginning when it created the radio object.

The code is as the following:

// This example program will make a cellular connection, open a TCP socket then
// send and receive data on the socket. After transmission, it will close
// the socket and disconnect the cellular connection.
//
// ** Configure the apn[] value below for MTQ-H5 or MTQ-LAT3 radios.
// ** INTERVAL sets the number of seconds between repeated cycles of this example.

#include “mbed.h”
#include “MTSCellularInterface.h”
#include “MTSLog.h”
#include “example_config.h”

#if ACTIVE_EXAMPLE == TCP_EXAMPLE

// Dragonfly debug port.
Serial debug_port(USBTX, USBRX);

#define INTERVAL 30

int main(){
//Sets the log level to INFO, higher log levels produce more log output.
//Possible levels: NONE, FATAL, ERROR, WARNING, INFO, DEBUG and TRACE.
//For the Dragonfly, installed on the UDK 2.0 board, messages are output on the
// UDK 2.0 USB port “COMxx: STMicroelectronics STLink Virtual COM port (xx)”
// at 9600bps.
mts::MTSLog::setLogLevel(mts::MTSLog::INFO_LEVEL);
//Sets the debug port to 115200bps.
debug_port.baud(115200);

// Create an MTSCellularInterface object. Serial pins for the Dragonfly board that connect
// to the on board cellular radio:
// RADIO_TX = pin PC_7, RADIO_RX = pin PC_6
MTSCellularInterface *radio = new MTSCellularInterface(RADIO_TX, RADIO_RX);

// Print the MTSCellularInterface version
logInfo(“MTSCellularInterface Version %s”, radio->get_library_version().c_str());

//Modify to match your apn if you are using the MTQ-H5 or MTQ-LAT3.
const char apn[] = “internet.telia.iot”;

// Basic HTTP request.
std::string request = “GET / HTTP/1.1\r\nHost: developer.mbed.org\r\n\r\n”;

int cycle_count = 1;

while (true) {
logInfo(“——– CYCLE #%d ——–\r\n”, cycle_count++);
prin
while(!radio->is_registered()){
logWarning(“radio not registered, try again in 2s”);
wait(2);
}

Timer tmr; //mbed Timer has a 30 minute maximum timeout.
tmr.start();
while (radio->connect(apn) != NSAPI_ERROR_OK) {
logWarning(“Radio did not connect”);
while (tmr.read() < 30); //make sure we wait at least 30s.
tmr.reset();
}
tmr.stop();

// Show the network address
const char *ip = radio->get_ip_address();
logInfo(“IP address is: %s\n”, ip ? ip : “No IP”);

// Open a socket on the network interface, and create a TCP connection to mbed.org
TCPSocket socket;

// Open a socket on the network interface.
if (socket.open(radio) != NSAPI_ERROR_OK) {
logWarning(“socket did not open”);
socket.close();
continue;
}

// Make a socket connection.
if (socket.connect(“developer.mbed.org”, 80) != NSAPI_ERROR_OK) {
logWarning(“socket did not connect”);
socket.close();
continue;
}

// Send tcp data
int scount = socket.send(request.c_str(), request.size());
logInfo(“sent %d bytes: %s”, scount, request.c_str());

// Recieve and print. Give a couple seonds to receive.
int size = 512;
char rbuffer[size];
memset(rbuffer, 0, size);
bool got_data = false;
Timer rcv_timer;
rcv_timer.start();
do {
int rcount = socket.recv(rbuffer, size-1); //leave room for a null character
if (rcount > 0) {
got_data = true;
while (rcount > 0) {
logInfo(“recv %d bytes: %s”, rcount, rbuffer);
memset(rbuffer, 0, size);
rcount = socket.recv(rbuffer, size-1);
}
}
} while (rcv_timer < 2 && !got_data);

// Close the socket to return its memory and bring down the network interface
socket.close();

radio->disconnect();

logInfo(“waiting %d seconds\r\n”, INTERVAL);
wait(INTERVAL);
}

}

#endif

Thanks for your help!

Kevin

[kevinpei2001@gmail.com]

Hello, please kindly help regarding this radio no registered issue.

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