ESP8266 Community Forum

- Sun May 28, 2017 9:32 am #66422 Hi everybody,

I make a project for my own, it consists to use ESP8266-ESP01 as wifi connection to send data to Apache server.

The problem is that I can't reach my server hosted on virtual machine(Linux Mint). I use AT command and it works great I can send data to my Windows server but I would like to do it with my Linux.

I did some test : I can ping ESP and Linux server from my Windows, I can ping ESP and Windows from Linux but Im only able to ping Windows from ESP with AT+PING command.

IPs are : 192.168.1.23 (Windows) 192.168.137.129 (Virtual Machine Linux) and 192.168.1.20 (ESP)

Here's my code :

Code: Select allvoid setup()
{
  ESP8266.begin(9600);
  delay(500);
  ESP8266.println("AT+RST");

  /* INIT */

  delay(1000);
  ESP8266.println("AT");
  done = ESP8266.find("OK");
  if(!done) {
    delay(1000);
    done = ESP8266.find("OK");
  }

  /* CLIENT MODE */

  delay(1000);
  ESP8266.println("AT+CWMODE=1");
  done = ESP8266.find("OK");
  if(!done) {
    delay(1000);
    done = ESP8266.find("OK");
  }

  /* */

  delay(1000);
  ESP8266.println("AT+CIPSTA=\"192.168.1.30\",\"192.168.1.1\",\"255.255.255.0\"");
  //ESP8266.println("AT+CIPSTA=\"192.168.137.10\"");
  done = ESP8266.find("OK");
  while(!done) {
    delay(1000);
    done = ESP8266.find("OK");
  }

  /* FIND WIFI */

  delay(1000);
  ESP8266.println("AT+CWLAP");
  done = ESP8266.find("OK");
  while(!done) {
    delay(1000);
    done = ESP8266.find("OK");
    delay(3000);
    break;
  }

  /* CONNECTION WIFI SSID */

  ESP8266.println("AT+CWJAP=\""+ssid+"\",\""+password+"\"");
  done = ESP8266.find("OK");
  while(!done) {
    delay(1000);
    done = ESP8266.find("OK");
  }

  /* MULTIPLE CONNECTION */

  ESP8266.println("AT+CIPMUX=1");
  done = ESP8266.find("OK");
  if(!done) {
    delay(1000);
    done = ESP8266.find("OK");
  }

  /* DISPLAY IP */

  ESP8266.println("AT+CIFSR");
  done = ESP8266.find("STAIP");
  if(!done) {
    delay(1000);
    done = ESP8266.find("OK");
  }

  /* PING SERVER */

  delay(1000);
  ESP8266.println("AT+PING=\"192.168.137.129\"");
  done = false;
  if(!done) {
    delay(1000);
    done = ESP8266.find("OK");
  } 
}


Here's the answer from ping return : "AT+PING="192.168.137.129" timeout ERROR"

Did I miss something ? I hope someone will find my mistake

Thank you

- Mon May 29, 2017 7:24 am #66463 Never mind being able to Ping from the ESP-01 module.

If you connect another PC to your network, are you able to Ping your Linux Mint from this other PC?
And I would not be surprised to see that you cannot.

Your Linux Mint is on a different sub-network.