ESP32 Forum

I'm trying OTA Firmware update of ESP32 using Cavlii C16Qs. I'm trying to Connect internet with ESP32 using Cavlii C16Qs. Basically issue is I'm Not getting Internet Connectivity using "AT+PPPSTART" and Cavli C16Qs modem. Cavlii C16Qs is use for Providing a LTE Network. I'm trying to Internet Connection using "AT+PPPSTART" Command. https://cavli.atlassian.net/servicedesk ... /343015460 This is the link of Document for AT Commands Details. So what should I change in the below code so that esp 32 can get internet connectivity through Cavlii C16Qs? So that I can fetch the firmware file from the server.

Arduino IDE Version: 1.8.19
ESP32 Board Version: 2.0.0

[Codebox]#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:

}[/Codebox]

current esp-at firmware doesn't support AT+PPPSTART command, i would like to suggest you seek help from the firmware provider.