我正在尝试使用 Cavlii C16Qs 通过 ESP32 连接互联网。但 ESP32 无法连接互联网

Question

我正在尝试使用 Cavlii C16Qs 进行 ESP32 的 OTA 固件更新。我正在尝试使用 Cavlii C16Qs 将互联网与 ESP32 连接。基本上问题是我无法使用“AT+PPPSTART”和 Cavli C16Qs 调制解调器获得互联网连接。 Cavlii C16Qs 用于提供 LTE 网络。我正在尝试使用“AT+PPPSTART”命令进行互联网连接。 https://cavli.atlassian.net/servicedesk/customer/portal/8/topic/6c7a6bd9-155b-4438-84bb-4807e4f8db19/article/343015460 这是AT命令详细信息文档的链接。那么我应该在下面的代码中更改什么，以便 esp 32 可以通过 Cavlii C16Qs 获得互联网连接？这样我就可以从服务器获取固件文件。

目标：使用外部调制解调器互联网连接、HTTP.h 和 Update.h 库的 ESP32 OTA。

Arduino IDE版本：1.8.19 ESP32 开发板版本：2.0.0

Serial 用于调试，Serial1 用于与 Cavlii C16Qs 进行串行通信。

#include <HTTPClient.h>
#include <update.h>

/* Cavli_C16QS */
String response = "";
const char *ipAddr;
String st1;
int value1, value2;
int clientID;

void setup() {
 // Power up the ESP32 by toggling the PWRKEY pin
  pinMode(2, OUTPUT);
  digitalWrite(2, LOW);
  delay(100);
  digitalWrite(2, HIGH);

  Serial.begin(115200);
  Serial1.begin(115200, SERIAL_8N1, 32, 33);  // RX, TX

  //////////////////////////////////
  // Send AT command via Serial to Cavli module
  Serial.println("Sending ATI command to Cavli module");
  Serial.println("==================================");
  Serial1.print("ATI");  // Send command via Serial2
  // FeedBack();
  delay(1000);
  while (Serial1.available()) {
    char c = Serial1.read();
    Serial.print(c);
  }
  Serial.println("Sending AT+COPS?");
  //////////////////////////////////
  // Read and print responses from Cavli module via Serial2
  while (!(response.indexOf("+ATREADY") != -1 || response.indexOf("OK") != -1)) {  
    Serial1.print("AT+COPS?\r\n");                                                 
    while (Serial1.available()) {
      char c = Serial1.read();
      response += c;
    }
     Serial.print("response-->");
     Serial.println(response);
  }
  delay(1000);  // Add a delay after sending the command
  response = "";
  //////////////////////////////////
  value1 = value2 = -1;
  Serial.println("Sending AT command... +CEREG? Checking network connectivity");
  while (!(value1 == 0 && (value2 == 1 || value2 == 5))) {
    Serial1.write("AT+CEREG?\r\n");
    delay(500);
    while (Serial1.available()) {
      char c = Serial1.read();
      response += c;
    }
     Serial.print("response-->");
     Serial.println(response);
    response = "";
  }

  delay(5000);  // Add a delay after sending the command
  response = "";
  //////////////////////////////////
  value1 = value2 = -1;
  Serial.println("Sending AT command... +CGACT? Checking internet connectivity");
  while (!(value1 == 1 && value2 == 1)) {
    Serial1.write("AT+CGACT?\r\n");
    delay(500);
    while (Serial1.available()) {
      char c = Serial1.read();
      response += c;
    }
     Serial.print("response-->");
     Serial.println(response);
     response = "";
  }
  //////////////////////////////////
  delay(500);  // Add a delay after sending the command
  response = "";
  Serial.println("Sending AT+NETIF?");
  Serial1.print("AT+NETIF?\r\n");  // Send command via Serial2
  // Read and print responses from Cavli module via Serial2
    while (Serial1.available()) {
      char c = Serial1.read();
      response += c;
    }
     Serial.print("response-->");
     Serial.println(response);
     response = "";

      Serial.println("Sending AT+PPPSTART");
      Serial1.print("AT+PPPSTART=?\r\n");  // Send command via Serial2
      // Read and print responses from Cavli module via Serial2
    while (Serial1.available()) {
      char c = Serial1.read();
      response += c;
    }
     Serial.print("response-->");
     Serial.println(response);
     response = "";

  String _url = url_OTA_code_head + code_ver + url_OTA_code_tail;
  delay(2000);

  HTTPClient http;
  http.begin(_url);
  int httpCode = http.GET();
  Serial.println(httpCode);

  Serial.println("----------------------------End Setup----------------------------");
  
}

void loop() {
  // put your main code here, to run repeatedly:

}

Answer 1

例如，请点击以下链接

链接