PPP Crash while im call PPP.end() and Call WiFi.begin(ssid,pass);

[The3ven]

Board

ESP32S3 Dev Module

Device Description

im using esp32s3 with esp32-3.0.3 core, 16 mb internal memory, i have Quectel EC200CN atteched with gpio 4 and 5.

Hardware Configuration

4 , 5 Quectel EC200UCN
SD card default pin

Version

v3.0.3

IDE Name

Arduino IDE

Operating System

Windows 10 22H2 (OS Build 19045.4717)

Flash frequency

QIO 80MHz

PSRAM enabled

no

Upload speed

921600

Description

my esp32s3 crash when im call WiFi.begin(ssid,pass); after PPP.end(); it crash with network _network_event_task task, idk how to fix this please help me.

Sketch

#include <PPP.h>
#include <WiFi.h>


String ssid = "ssid";
String pass = "pass";

int loop_cnt = 0;
bool quectelOffOnce = true;
bool quackOff = false;

#define PPP_MODEM_APN "AIRTELGPRS.COM" // For SimCard ISP
#define PPP_MODEM_PIN   NULL // or NULL

// EC200U copyed from WaveShare SIM7600 HW Flow Control
#define PPP_MODEM_RST     41 // as vishal sys it will aviliable in next rev
#define PPP_MODEM_RST_LOW true  //active HIGH
#define PPP_MODEM_TX      4
#define PPP_MODEM_RX      5
#define PPP_MODEM_RTS     -1
#define PPP_MODEM_CTS     -1
#define PPP_MODEM_FC      ESP_MODEM_FLOW_CONTROL_NONE
#define PPP_MODEM_MODEL   PPP_MODEM_GENERIC

void onEvent(arduino_event_id_t event, arduino_event_info_t info) {
    switch (event) {
    case ARDUINO_EVENT_PPP_START:
        Serial.println("PPP Started");
        break;
    case ARDUINO_EVENT_PPP_CONNECTED:
        Serial.println("PPP Connected");
        break;
    case ARDUINO_EVENT_PPP_GOT_IP:
        Serial.println("PPP Got IP");
        break;
    case ARDUINO_EVENT_PPP_LOST_IP:
        Serial.println("PPP Lost IP");
        break;
    case ARDUINO_EVENT_PPP_DISCONNECTED:
        Serial.println("PPP Disconnected");
        break;
    case ARDUINO_EVENT_PPP_STOP:
        Serial.println("PPP Stopped");
        break;
    default:
        break;
    }
}

void testClient(const char* host, uint16_t port) {
    NetworkClient client;
    if (!client.connect(host, port)) {
        Serial.println("Connection Failed");
        return;
    }
    client.printf("GET / HTTP/1.1\r\nHost: %s\r\n\r\n", host);
    while (client.connected() && !client.available());
    while (client.available()) {
        client.read();  //Serial.write(client.read());
    }

    Serial.println("Connection Success");
    client.stop();
}


void Quectelbegin() {
    // Listen for modem events
    Network.onEvent(onEvent);

    // Configure the modem
    PPP.setApn(PPP_MODEM_APN);
    PPP.setPin(PPP_MODEM_PIN);
    PPP.setResetPin(PPP_MODEM_RST, PPP_MODEM_RST_LOW, 300);
    PPP.setPins(PPP_MODEM_TX, PPP_MODEM_RX, PPP_MODEM_RTS, PPP_MODEM_CTS, PPP_MODEM_FC);

    Serial.println("Starting the modem. It might take a while!");
    PPP.begin(PPP_MODEM_MODEL);

    Serial.print("Manufacturer: ");
    Serial.println(PPP.cmd("AT+CGMI", 10000));
    Serial.print("Model: ");
    Serial.println(PPP.moduleName());
    Serial.print("IMEI: ");
    Serial.println(PPP.IMEI());

    bool attached = PPP.attached();
    if (!attached) {
        int i = 0;
        unsigned int s = millis();
        Serial.print("Waiting to connect to network");
        while (!attached && ((++i) < 600)) {
            Serial.print(".");
            delay(100);
            attached = PPP.attached();
        }
        Serial.print((millis() - s) / 1000.0, 1);
        Serial.println("s");
        attached = PPP.attached();
    }

    Serial.print("Attached: ");
    Serial.println(attached);
    Serial.print("State: ");
    Serial.println(PPP.radioState());
    if (attached) {
        Serial.print("Operator: ");
        Serial.println(PPP.operatorName());
        Serial.print("IMSI: ");
        Serial.println(PPP.IMSI());
        Serial.print("RSSI: ");
        Serial.println(PPP.RSSI());
        int ber = PPP.BER();
        if (ber > 0) {
            Serial.print("BER: ");
            Serial.println(ber);
            Serial.print("NetMode: ");
            Serial.println(PPP.networkMode());
        }

        Serial.println("Switching to data mode...");
        PPP.mode(ESP_MODEM_MODE_CMUX);  // Data and Command mixed mode
        if (!PPP.waitStatusBits(ESP_NETIF_CONNECTED_BIT, 1000)) {
            Serial.println("Failed to connect to internet!");
        }
        else {
            Serial.println("Connected to internet!");
        }
    }
    else {
        Serial.println("Failed to connect to network!");
    }
}

bool queConnected() {
    return PPP.connected();
}

String getIP() {
    return String(PPP.localIP().toString());
}

void setup()
{
    Serial.begin(115200);
    Quectelbegin(); // begin quectel to get connect to internet
    while (!queConnected()) // check if quectel connect to internet if not wait for it
    {
        // boo!
    }
    if (queConnected())
    {
        String IP = getIP();
        if (IP != "0.0.0.0")
        {
            Serial.println("PPPOS CONNECTED !");
            Serial.println("IP : " + IP);
        }
    }
}


void resetQuectel()
{
    if (quectelOffOnce)
    {
        if (PPP.connected() && WiFi.status() != WL_CONNECTED)
        {
            Serial.println("PPP.connected() : " + String(PPP.connected()));
            Serial.println("WiFi.status() == WL_DISCONNECTED : " + String(WiFi.status() == WL_DISCONNECTED));
            Serial.println("+PPP END #1");
            PPP.end();
            Serial.println("+PPP END #2");
        }

        Serial.println("PPP end here !");
        pinMode(PPP_MODEM_RST, OUTPUT);
        digitalWrite(PPP_MODEM_RST, true);
        delay(3000);
        digitalWrite(PPP_MODEM_RST, false);
        delay(100);
        Serial.println("Modem Reset Done");
        quectelOffOnce = false;
    }
}


void connectAndCheckWiFiStatus()
{
    if (WiFi.status() != WL_CONNECTED)
    {
        WiFi.begin(ssid, pass);
        delay(200);
        while (WiFi.status() != WL_CONNECTED)
        {
            Serial.print(".");
            delay(100);
        }
        if (WiFi.status() == WL_CONNECTED)
        {
            return;
        }
    }
}



void loop()
{
    if (!quackOff)
    {
        if (!queConnected())
        {
            Quectelbegin();
        }
        while (!queConnected())
        {
        }; // check if quectel connect to internet if not wait for it
    }
    delay(100);
    testClient("google.com", 80);
    if (loop_cnt >= 200)
    {
        if (!quackOff)
        {
            resetQuectel();
            quackOff = true;
        }
    }
    if (quackOff)
    {
        connectAndCheckWiFiStatus();
    }
    loop_cnt++;
    delay(2000);
}

Debug Message

Core  1 register dump:
PC      : 0x00000000  PS      : 0x00060530  A0      : 0x82089248  A1      : 0x3fca8700  
A2      : 0x00000001  A3      : 0x3fca23c0  A4      : 0x3fca1600  A5      : 0x3fca8710  
A6      : 0x3fca87e0  A7      : 0x3fce9ff0  A8      : 0x82089219  A9      : 0x3fca86f0  
A10     : 0x3fca8710  A11     : 0x3fca8704  A12     : 0x3fca8728  A13     : 0x3fca87dc  
A14     : 0x00000032  A15     : 0x00000000  SAR     : 0x00000019  EXCCAUSE: 0x00000014  
EXCVADDR: 0x00000000  LBEG    : 0x40056f5c  LEND    : 0x40056f72  LCOUNT  : 0x00000000  


Backtrace: 0xfffffffd:0x3fca8700 0x42089245:0x3fca8800 0x40380e36:0x3fca8820



ELF file SHA256: c90df16c60dd61c6

Other Steps to Reproduce

i have only windows.

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[me-no-dev]

please simplify the sketch to minimum necessary and decode the backtrace with ExceptionDecoder

[The3ven]

please simplify the sketch to minimum necessary and decode the backtrace with ExceptionDecoder

https://github.com/espressif/arduino-esp32/blob/3.0.3/libraries/Network/src/NetworkEvents.cpp#L28

[The3ven]

this is minimum sketch code from my project, it just have WiFi, ppp and a testclient function, all of them handled by flags

[me-no-dev]

What is the exception reason? Can you simplify the sketch? Maybe also try this:

[me-no-dev]

his is minimum ketch code from my project

it contains a lot of calls that are not necessary to show that "PPP Crash while im call PPP.end() and Call WiFi.begin(ssid,pass);"

[The3ven]

it like when PPP.end() called it didnt end event task which is begin by NetworkEvent which is called by PPP.begin()
i have also checked PPP and WiFi both libraries called NetworkManager.h

[The3ven]

his is minimum ketch code from my project

it contains a lot of calls that are not necessary to show that "PPP Crash while im call PPP.end() and Call WiFi.begin(ssid,pass);"

after PPP.end() im call WiFi.begin()

[me-no-dev]

That sketch above is too complicated to display and replicate the issue. I am not sure how to say that better. Please simplify it to something like starting PPP, stopping PPP and starting WIFI. Code above has many ifs and tracks divferent things that are in no way connected to the issue.

[The3ven]

That sketch above is too complicated to display and replicate the issue. I am not sure how to say that better. Please simplify it to something like starting PPP, stopping PPP and starting WIFI. Code above has many ifs and tracks divferent things that are in no way connected to the issue.

i got it let me simplify it

[The3ven]

#include <PPP.h>
#include <WiFi.h>


String ssid = "ssid";
String pass = "pass";

int loop_cnt = 0;
bool quackOff = false;

#define PPP_MODEM_APN "AIRTELGPRS.COM" // For SimCard ISP
#define PPP_MODEM_PIN   NULL // or NULL

// EC200U copyed from WaveShare SIM7600 HW Flow Control
#define PPP_MODEM_RST     41 // as vishal sys it will aviliable in next rev
#define PPP_MODEM_RST_LOW true  //active HIGH
#define PPP_MODEM_TX      4
#define PPP_MODEM_RX      5
#define PPP_MODEM_RTS     -1
#define PPP_MODEM_CTS     -1
#define PPP_MODEM_FC      ESP_MODEM_FLOW_CONTROL_NONE
#define PPP_MODEM_MODEL   PPP_MODEM_GENERIC

void onEvent(arduino_event_id_t event, arduino_event_info_t info) {
    switch (event) {
    case ARDUINO_EVENT_PPP_START:
        Serial.println("PPP Started");
        break;
    case ARDUINO_EVENT_PPP_CONNECTED:
        Serial.println("PPP Connected");
        break;
    case ARDUINO_EVENT_PPP_GOT_IP:
        Serial.println("PPP Got IP");
        break;
    case ARDUINO_EVENT_PPP_LOST_IP:
        Serial.println("PPP Lost IP");
        break;
    case ARDUINO_EVENT_PPP_DISCONNECTED:
        Serial.println("PPP Disconnected");
        break;
    case ARDUINO_EVENT_PPP_STOP:
        Serial.println("PPP Stopped");
        break;
    default:
        break;
    }
}

void testClient(const char* host, uint16_t port) {
    NetworkClient client;
    if (!client.connect(host, port)) {
        Serial.println("Connection Failed");
        return;
    }
    client.printf("GET / HTTP/1.1\r\nHost: %s\r\n\r\n", host);
    while (client.connected() && !client.available());
    while (client.available()) {
        client.read();  //Serial.write(client.read());
    }

    Serial.println("Connection Success");
    client.stop();
}

void setup()
{
    Serial.begin(115200);
    Network.onEvent(onEvent);

    // Configure the modem
    PPP.setApn(PPP_MODEM_APN);
    PPP.setPin(PPP_MODEM_PIN);
    PPP.setResetPin(PPP_MODEM_RST, PPP_MODEM_RST_LOW, 300);
    PPP.setPins(PPP_MODEM_TX, PPP_MODEM_RX, PPP_MODEM_RTS, PPP_MODEM_CTS, PPP_MODEM_FC);

    Serial.println("Starting the modem. It might take a while!");
    PPP.begin(PPP_MODEM_MODEL);

    Serial.print("Manufacturer: ");
    Serial.println(PPP.cmd("AT+CGMI", 10000));
    Serial.print("Model: ");
    Serial.println(PPP.moduleName());
    Serial.print("IMEI: ");
    Serial.println(PPP.IMEI());

    bool attached = PPP.attached();
    if (!attached) {
        int i = 0;
        unsigned int s = millis();
        Serial.print("Waiting to connect to network");
        while (!attached && ((++i) < 600)) {
            Serial.print(".");
            delay(100);
            attached = PPP.attached();
        }
        Serial.print((millis() - s) / 1000.0, 1);
        Serial.println("s");
        attached = PPP.attached();
    }

    Serial.print("Attached: ");
    Serial.println(attached);
    Serial.print("State: ");
    Serial.println(PPP.radioState());
    if (attached) {
        Serial.print("Operator: ");
        Serial.println(PPP.operatorName());
        Serial.print("IMSI: ");
        Serial.println(PPP.IMSI());
        Serial.print("RSSI: ");
        Serial.println(PPP.RSSI());
        int ber = PPP.BER();
        if (ber > 0) {
            Serial.print("BER: ");
            Serial.println(ber);
            Serial.print("NetMode: ");
            Serial.println(PPP.networkMode());
        }

        Serial.println("Switching to data mode...");
        PPP.mode(ESP_MODEM_MODE_CMUX);  // Data and Command mixed mode
        if (!PPP.waitStatusBits(ESP_NETIF_CONNECTED_BIT, 1000)) {
            Serial.println("Failed to connect to internet!");
        }
        else {
            Serial.println("Connected to internet!");
        }
    }
    else {
        Serial.println("Failed to connect to network!");
    }
}


void loop()
{
    if (loop_cnt >= 200 && PPP.connected() && WiFi.status() != WL_CONNECTED)
    {
        PPP.end();
        pinMode(PPP_MODEM_RST, OUTPUT);
        digitalWrite(PPP_MODEM_RST, true);
        delay(3000);
        digitalWrite(PPP_MODEM_RST, false);
        delay(100);
        quackOff = true;
    }

    if (quackOff)
    {
        if (WiFi.status() != WL_CONNECTED)
        {
            WiFi.begin(ssid, pass);
            delay(200);
            while (WiFi.status() != WL_CONNECTED)
            {
                Serial.print(".");
                delay(100);
            }
        }
    }

    testClient("google.com", 80);
    loop_cnt++;
    delay(2000);
}

Here we go

[Jason2866]

Using the example sketch (modified for Lilygo T-SIMCAM with mPCIe SIM7600G LTE module) works fine with the S3

#include <PPP.h>

#define PPP_MODEM_APN "internet"
#define PPP_MODEM_PIN "0000"  // or NULL

// Lilygo T-SIMCAM with mPCIe SIM7600G LTE module
#define PPP_MODEM_RST     48
#define PPP_MODEM_RST_LOW false  //active HIGH
#define PPP_MODEM_TX      45
#define PPP_MODEM_RX      46
#define PPP_MODEM_RTS     -1
#define PPP_MODEM_CTS     -1
#define PPP_MODEM_FC      ESP_MODEM_FLOW_CONTROL_NONE
#define PPP_MODEM_MODEL   PPP_MODEM_SIM7600

// SIM800 basic module with just TX,RX and RST
// #define PPP_MODEM_RST     0
// #define PPP_MODEM_RST_LOW true //active LOW
// #define PPP_MODEM_TX      2
// #define PPP_MODEM_RX      19
// #define PPP_MODEM_RTS     -1
// #define PPP_MODEM_CTS     -1
// #define PPP_MODEM_FC      ESP_MODEM_FLOW_CONTROL_NONE
// #define PPP_MODEM_MODEL   PPP_MODEM_SIM800

void onEvent(arduino_event_id_t event, arduino_event_info_t info) {
  switch (event) {
    case ARDUINO_EVENT_PPP_START:        Serial.println("PPP Started"); break;
    case ARDUINO_EVENT_PPP_CONNECTED:    Serial.println("PPP Connected"); break;
    case ARDUINO_EVENT_PPP_GOT_IP:       Serial.println("PPP Got IP"); break;
    case ARDUINO_EVENT_PPP_LOST_IP:      Serial.println("PPP Lost IP"); break;
    case ARDUINO_EVENT_PPP_DISCONNECTED: Serial.println("PPP Disconnected"); break;
    case ARDUINO_EVENT_PPP_STOP:         Serial.println("PPP Stopped"); break;
    default:                             break;
  }
}

void testClient(const char *host, uint16_t port) {
  NetworkClient client;
  if (!client.connect(host, port)) {
    Serial.println("Connection Failed");
    return;
  }
  client.printf("GET / HTTP/1.1\r\nHost: %s\r\n\r\n", host);
  while (client.connected() && !client.available());
  while (client.available()) {
    client.read();  //Serial.write(client.read());
  }

  Serial.println("Connection Success");
  client.stop();
}

void setup() {
  Serial.begin(115200);

  // Listen for modem events
  Network.onEvent(onEvent);

  // Configure the modem
  PPP.setApn(PPP_MODEM_APN);
  PPP.setPin(PPP_MODEM_PIN);
  PPP.setResetPin(PPP_MODEM_RST, PPP_MODEM_RST_LOW);
  PPP.setPins(PPP_MODEM_TX, PPP_MODEM_RX, PPP_MODEM_RTS, PPP_MODEM_CTS, PPP_MODEM_FC);

  Serial.println("Starting the modem. It might take a while!");
  PPP.begin(PPP_MODEM_MODEL);

  Serial.print("Manufacturer: ");
  Serial.println(PPP.cmd("AT+CGMI", 10000));
  Serial.print("Model: ");
  Serial.println(PPP.moduleName());
  Serial.print("IMEI: ");
  Serial.println(PPP.IMEI());

  bool attached = PPP.attached();
  if (!attached) {
    int i = 0;
    unsigned int s = millis();
    Serial.print("Waiting to connect to network");
    while (!attached && ((++i) < 600)) {
      Serial.print(".");
      delay(100);
      attached = PPP.attached();
    }
    Serial.print((millis() - s) / 1000.0, 1);
    Serial.println("s");
    attached = PPP.attached();
  }

  Serial.print("Attached: ");
  Serial.println(attached);
  Serial.print("State: ");
  Serial.println(PPP.radioState());
  if (attached) {
    Serial.print("Operator: ");
    Serial.println(PPP.operatorName());
    Serial.print("IMSI: ");
    Serial.println(PPP.IMSI());
    Serial.print("RSSI: ");
    Serial.println(PPP.RSSI());
    int ber = PPP.BER();
    if (ber > 0) {
      Serial.print("BER: ");
      Serial.println(ber);
      Serial.print("NetMode: ");
      Serial.println(PPP.networkMode());
    }

    Serial.println("Switching to data mode...");
    PPP.mode(ESP_MODEM_MODE_CMUX);  // Data and Command mixed mode
    if (!PPP.waitStatusBits(ESP_NETIF_CONNECTED_BIT, 1000)) {
      Serial.println("Failed to connect to internet!");
    } else {
      Serial.println("Connected to internet!");
    }
  } else {
    Serial.println("Failed to connect to network!");
  }
}

void loop() {
  if (PPP.connected()) {
    testClient("google.com", 80);
  }
  delay(20000);
}

[The3ven]

Using the example sketch (modified for Lilygo T-SIMCAM with mPCIe SIM7600G LTE module) works fine with the S3

#include <PPP.h>

#define PPP_MODEM_APN "internet"
#define PPP_MODEM_PIN "0000"  // or NULL

// Lilygo T-SIMCAM with mPCIe SIM7600G LTE module
#define PPP_MODEM_RST     48
#define PPP_MODEM_RST_LOW false  //active HIGH
#define PPP_MODEM_TX      45
#define PPP_MODEM_RX      46
#define PPP_MODEM_RTS     -1
#define PPP_MODEM_CTS     -1
#define PPP_MODEM_FC      ESP_MODEM_FLOW_CONTROL_NONE
#define PPP_MODEM_MODEL   PPP_MODEM_SIM7600

// SIM800 basic module with just TX,RX and RST
// #define PPP_MODEM_RST     0
// #define PPP_MODEM_RST_LOW true //active LOW
// #define PPP_MODEM_TX      2
// #define PPP_MODEM_RX      19
// #define PPP_MODEM_RTS     -1
// #define PPP_MODEM_CTS     -1
// #define PPP_MODEM_FC      ESP_MODEM_FLOW_CONTROL_NONE
// #define PPP_MODEM_MODEL   PPP_MODEM_SIM800

void onEvent(arduino_event_id_t event, arduino_event_info_t info) {
  switch (event) {
    case ARDUINO_EVENT_PPP_START:        Serial.println("PPP Started"); break;
    case ARDUINO_EVENT_PPP_CONNECTED:    Serial.println("PPP Connected"); break;
    case ARDUINO_EVENT_PPP_GOT_IP:       Serial.println("PPP Got IP"); break;
    case ARDUINO_EVENT_PPP_LOST_IP:      Serial.println("PPP Lost IP"); break;
    case ARDUINO_EVENT_PPP_DISCONNECTED: Serial.println("PPP Disconnected"); break;
    case ARDUINO_EVENT_PPP_STOP:         Serial.println("PPP Stopped"); break;
    default:                             break;
  }
}

void testClient(const char *host, uint16_t port) {
  NetworkClient client;
  if (!client.connect(host, port)) {
    Serial.println("Connection Failed");
    return;
  }
  client.printf("GET / HTTP/1.1\r\nHost: %s\r\n\r\n", host);
  while (client.connected() && !client.available());
  while (client.available()) {
    client.read();  //Serial.write(client.read());
  }

  Serial.println("Connection Success");
  client.stop();
}

void setup() {
  Serial.begin(115200);

  // Listen for modem events
  Network.onEvent(onEvent);

  // Configure the modem
  PPP.setApn(PPP_MODEM_APN);
  PPP.setPin(PPP_MODEM_PIN);
  PPP.setResetPin(PPP_MODEM_RST, PPP_MODEM_RST_LOW);
  PPP.setPins(PPP_MODEM_TX, PPP_MODEM_RX, PPP_MODEM_RTS, PPP_MODEM_CTS, PPP_MODEM_FC);

  Serial.println("Starting the modem. It might take a while!");
  PPP.begin(PPP_MODEM_MODEL);

  Serial.print("Manufacturer: ");
  Serial.println(PPP.cmd("AT+CGMI", 10000));
  Serial.print("Model: ");
  Serial.println(PPP.moduleName());
  Serial.print("IMEI: ");
  Serial.println(PPP.IMEI());

  bool attached = PPP.attached();
  if (!attached) {
    int i = 0;
    unsigned int s = millis();
    Serial.print("Waiting to connect to network");
    while (!attached && ((++i) < 600)) {
      Serial.print(".");
      delay(100);
      attached = PPP.attached();
    }
    Serial.print((millis() - s) / 1000.0, 1);
    Serial.println("s");
    attached = PPP.attached();
  }

  Serial.print("Attached: ");
  Serial.println(attached);
  Serial.print("State: ");
  Serial.println(PPP.radioState());
  if (attached) {
    Serial.print("Operator: ");
    Serial.println(PPP.operatorName());
    Serial.print("IMSI: ");
    Serial.println(PPP.IMSI());
    Serial.print("RSSI: ");
    Serial.println(PPP.RSSI());
    int ber = PPP.BER();
    if (ber > 0) {
      Serial.print("BER: ");
      Serial.println(ber);
      Serial.print("NetMode: ");
      Serial.println(PPP.networkMode());
    }

    Serial.println("Switching to data mode...");
    PPP.mode(ESP_MODEM_MODE_CMUX);  // Data and Command mixed mode
    if (!PPP.waitStatusBits(ESP_NETIF_CONNECTED_BIT, 1000)) {
      Serial.println("Failed to connect to internet!");
    } else {
      Serial.println("Connected to internet!");
    }
  } else {
    Serial.println("Failed to connect to network!");
  }
}

void loop() {
  if (PPP.connected()) {
    testClient("google.com", 80);
  }
  delay(20000);
}

PPP Standalone Work like a charm with my board too, but when im add WiFi with it, then i encounter crash, did you check PPP with WiFi ?

[me-no-dev]

I tried your sketch and removed the unnecessary prints. Here is the result:

Starting the modem. It might take a while!
PPP Started
Waiting to connect to network..............................................................................................
Switching to data mode...
PPP Got IP
PPP Connected
Connected to internet!
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
Connection Success
PPP Disconnected
PPP Stopped
..........Connection Success
Connection Success
Connection Success
Connection Success

[The3ven]

thanks a lot it seems my project have issue, i will check my project and get back to you, please don`t close this issue for now