u-blox Nina b112 error + Sara G350

[tcpipchip]

Sir,
How are you ?
After config

    "nsapi.default-cellular-apn": "\"java.com.br.br\"",
        "nsapi.default-cellular-username":  "\"claro\"",
        "nsapi.default-cellular-password":  "\"claro\"",
        "GENERIC_AT3GPP.tx": "p8",
    "GENERIC_AT3GPP.rx": "p11",
"GENERIC_AT3GPP.baudrate":115200
    },
    "NRF52_DK": {
        "target.macros_add": ["UBX_MDM_SARA_G3XX", "UBX_MDM_SARA_G350"]
    }

I am getting the error

mbed-os-example-cellular
Failed to get_default_instance()

Can you help me ?

[0xc0170]

The error comes from the example

#if MBED_CONF_APP_SOCK_TYPE == NONIP
    NetworkInterface *net = CellularContext::get_default_nonip_instance();
#else
    NetworkInterface *net = CellularContext::get_default_instance();
#endif

You should check what is being returned inside this default instance function (I assume you get into ip one).

[AnttiKauppila]

Have you configured the modem to provide the default instance?
You need to override and set one of the following to true in your mbed_app.json:
https://github.com/ARMmbed/mbed-os/blob/master/connectivity/drivers/cellular/UBLOX/PPP/mbed_lib.json#L24-L26 for PPP mode or
https://github.com/ARMmbed/mbed-os/blob/master/connectivity/drivers/cellular/UBLOX/AT/mbed_lib.json#L24-L26 for AT mode

[ciarmcom]

@tcpipchip This issue has an incomplete or old issue template.For future reference please use an up to date clone of the repository before raising issues. Many thanks.

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-4068

[tcpipchip]

Team!!!!
Thank you for the fast help! I hope soon test in 4 u-blox modem models that i have here! I intend to make blogs about then using the PPP.
Well, getting progress here!

[tcpipchip]

getting more progresss!
But i need some TIP

[tcpipchip]

Here a link
https://youtu.be/FVG1x1xtzto

I am not using handshaking!
DNS is resolving!

[tcpipchip]

Hi, i tried too other servers...got connection to the server, but cant send and receive data

some suggestion team ?

[tcpipchip]

Sir
Can you see if am i doing something wrong ?
`/*

• Copyright (c) 2017 ARM Limited. All rights reserved.
• SPDX-License-Identifier: Apache-2.0
• Licensed under the Apache License, Version 2.0 (the License); you may
• not use this file except in compliance with the License.
• You may obtain a copy of the License at
• http://www.apache.org/licenses/LICENSE-2.0
• Unless required by applicable law or agreed to in writing, software
• distributed under the License is distributed on an AS IS BASIS, WITHOUT
• WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
• See the License for the specific language governing permissions and
• limitations under the License.
  */

#include "mbed.h"
#include "CellularNonIPSocket.h"
#include "UDPSocket.h"
#include "TCPSocket.h"
#include "cellular_demo_tracing.h"

/* configuration choices in mbed_app.json */
#define UDP 0
#define TCP 1
#define NONIP 2

#if MBED_CONF_APP_SOCK_TYPE == TCP
static constexpr char SOCKET_TYPE[] = "TCP";
#elif MBED_CONF_APP_SOCK_TYPE == UDP
static constexpr char SOCKET_TYPE[] = "UDP";
#elif MBED_CONF_APP_SOCK_TYPE == NONIP
static constexpr char SOCKET_TYPE[] = "CellularNonIP";
#endif
static const char ECHO_HOSTNAME[] = MBED_CONF_APP_ECHO_SERVER_HOSTNAME;

class CellularDemo {
static constexpr uint8_t RETRY_COUNT = 3;

public:
CellularDemo(NetworkInterface &network)
: _net(network)
{ }

~CellularDemo() { }

/** Run the cellular demo. */
void run()
{
    /* sim pin, apn, credentials and possible plmn are taken automatically from json
     * when using NetworkInterface::set_default_parameters() */
    _net.set_default_parameters();

    nsapi_size_or_error_t ret = NSAPI_ERROR_NO_CONNECTION;

    if (connect_cellular()) {
        /* ping echo server */
        if (!test_send_and_receive()) {
            printf("Sending and received data failed.\n");
            wait_us(1000000);
        }

        ret = _net.disconnect();

        if (ret != NSAPI_ERROR_OK) {
            printf("Disconnect failed (error: %d).\n", ret);
            wait_us(1000000);
        }
    }

    if (ret == NSAPI_ERROR_OK) {
        printf("Success. Exiting\n");
        wait_us(1000000);
    } else {
        printf("Failure. Exiting\n");
        wait_us(1000000);
    }
}

private:
/**
* For UDP or TCP it opens a socket with the given echo server and performs an echo transaction.
* For Cellular Non-IP it opens a socket for which the data delivery path is decided
* by network's control plane CIoT optimisation setup, for the given APN.
*/
bool test_send_and_receive()
{
nsapi_size_or_error_t ret;

    ret = _socket.open(&_net);

    if (ret != NSAPI_ERROR_OK) {
        printf("%sSocket.open() fails, code: %d\n", SOCKET_TYPE, ret);
        wait_us(1000000);
        return false;
    }

    _socket.set_timeout(15000);

    if (!resolve_hostname()) {
        return false;
    }

    if (!connect_socket()) {
        return false;
    }

    ret = send_test_data();


    if (ret < 0) {
        printf("%sSocket.send() fails, code: %d\n", SOCKET_TYPE, ret);
        wait_us(1000000);
        return false;
    } else {
        printf("%s: Sent %d Bytes to %s\n", SOCKET_TYPE, ret, ECHO_HOSTNAME);
        wait_us(1000000);
    }

    ret = receive_test_data();

    if (ret < 0) {
        printf("%sSocket.recv() fails, code: %d\n", SOCKET_TYPE, ret);
        wait_us(1000000);
        return false;
    } else {
        printf("Received from echo server %d Bytes\n", ret);
        wait_us(1000000);
    }

    _socket.close();

    if (ret != NSAPI_ERROR_OK) {
        printf("%sSocket.close() fails, code: %d\n", SOCKET_TYPE, ret);
        wait_us(1000000);
        return false;
    }

    return true;
}

/** Connects to the Cellular Network */
bool connect_cellular()
{
    printf("Establishing connection\n");
    wait_us(1000000);

    /* check if we're already connected */
    if (_net.get_connection_status() == NSAPI_STATUS_GLOBAL_UP) {
        return true;
    }

    nsapi_error_t ret;

    for (uint8_t retry = 0; retry <= RETRY_COUNT; retry++) {
        ret = _net.connect();

        if (ret == NSAPI_ERROR_OK) {
            printf("Connection Established.\n");
            wait_us(1000000);
            return true;
        } else if (ret == NSAPI_ERROR_AUTH_FAILURE) {
            printf("Authentication Failure.\n");
            wait_us(1000000);
            return false;
        } else {
            printf("Couldn't connect: %d, will retry\n", ret);
            wait_us(1000000);
        }
    }

    printf("Fatal connection failure: %d\n", ret);
    wait_us(1000000);

    return false;
}

/** Connects to the Cellular Network */
bool resolve_hostname()
{

#if MBED_CONF_APP_SOCK_TYPE != NONIP
nsapi_error_t ret = _net.gethostbyname(ECHO_HOSTNAME, &_socket_address);

    if (ret != NSAPI_ERROR_OK) {
        printf("Couldn't resolve remote host: %s, code: %d\n", ECHO_HOSTNAME, ret);
        wait_us(1000000);
        return false;
    }

    _socket_address.set_port(MBED_CONF_APP_ECHO_SERVER_PORT);

#endif
return true;
}

bool connect_socket()
{

#if MBED_CONF_APP_SOCK_TYPE == TCP
nsapi_error_t ret = _socket.connect(_socket_address);
if (ret < 0) {
printf("TCPSocket.connect() fails, code: %d\n", ret);
wait_us(1000000);
return false;
} else {
printf("TCP: connected with %s server\n", ECHO_HOSTNAME);
wait_us(1000000);
}
#endif
return true;
}

nsapi_error_t send_test_data()
{
    const char *echo_string = "TEST";

#if MBED_CONF_APP_SOCK_TYPE == UDP
return _socket.sendto(_socket_address, (void*)echo_string, strlen(echo_string));
#else
return _socket.send((void*)echo_string, strlen(echo_string));
#endif
}

nsapi_error_t receive_test_data()
{
    char receive_buffer[4];

#if MBED_CONF_APP_SOCK_TYPE == UDP
return _socket.recvfrom(&_socket_address, (void*)receive_buffer, sizeof(receive_buffer));
#else
return _socket.recv((void*)receive_buffer, sizeof(receive_buffer));
#endif
}

private:
NetworkInterface &_net;

#if MBED_CONF_APP_SOCK_TYPE == TCP
TCPSocket _socket;
SocketAddress _socket_address;
#elif MBED_CONF_APP_SOCK_TYPE == UDP
UDPSocket _socket;
SocketAddress _socket_address;
#elif MBED_CONF_APP_SOCK_TYPE == NONIP
CellularNonIPSocket _socket;
#endif
};

int main() {
printf("\nmbed-os-example-cellular\n");
wait_us(1000000);

trace_open();

#if MBED_CONF_APP_SOCK_TYPE == NONIP
NetworkInterface *net = CellularContext::get_default_nonip_instance();
#else
NetworkInterface *net = CellularContext::get_default_instance();
#endif

if (net) {
    CellularDemo example(*net);
    example.run();
} else {
    printf("Failed to get_default_instance()\n");
    wait_us(1000000);
}

trace_close();

return 0;

}
`

Getting always this error

Tested in 4 modems

[paul-szczepanek-arm]

Enabling tracing might help you diagnose the problem.

[tcpipchip]

hi @paul-szczepanek-arm

weird that there that PPP CONNECTION is estabilshed, the DNS resolver work, make the SOCKET CONNECTION, but not send and receive.
To me, looks some UART problem, but i dont know what...
Something weird, because in the main.cpp, i had to include after each printf, and wait_us(1000000); otherwise, overrun on my uart receive
printf("Disconnect failed (error: %d).\n", ret);
wait_us(1000000);

Btw something is happeing in the MODEM UART too

If i enable the trace, i have the UART OVERRUN and i can see anything :(

Now i am testing on SARA G450 connected to a NINA B112 (NRF52832)

Do the PPP is using handshacking ?

Thanks!

[tcpipchip]

Must i try to change to PAP or CHAP to works ?
Did you try already with NRF52 ?