Question

I'm connecting to an ESP8266 in Arduino. I want to connect the wifi module with Arduino. I want to find the IP using AT+CIFSR. How to print the IP using an AT command in the serial monitor? To connect with a telnet app, the IP is needed to insert in Android phone.

#include "SoftwareSerial.h"
String ssid = "connectify-krish";
String password = "12345678";
SoftwareSerial esp(10, 11);
void setup() {
  int len;
  Serial.begin(9600);
  esp.begin(9600);
  reset();
  esp.println("AT");
  delay(1000);
  if (esp.find("OK")) Serial.println("Module Reset");
  esp.println("AT+RST");
  delay(1000);
  if (esp.find("OK")) Serial.println("Reset");
  esp.println("AT+RST");
  delay(1000);
  String cmd = "AT+CWJAP=\"" + ssid + "\",\"" + password + "\"";
  Serial.println(cmd);
  String site= "www.google.com";
  String ping = "AT+PING=\"" + site + "\"";
  esp.println(ping);
  if (esp.find("OK")) Serial.println("CONNECTED WIFI");
  String ip = "AT+CIFSR";
  esp.println(ping);
  if (esp.find("OK")) Serial.println("ip is");
}

void reset() {
  if(esp.available()) {
    // check if the esp is sending a message
    while(esp.available()) {
      // The esp has data so display its output to the serial window
      char c = esp.read(); // read the next character.
      Serial.write(c);
    }
  }
}

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

Answer 1

您没有发送AT命令

String ip = "AT+CIFSR";
esp.println(ping);
if (esp.find("OK")) Serial.println("ip is");

应该是

String ip = "AT+CIFSR";
esp.println(ip);
Serial.print("ip is ");
// Loop through all the data returned
while(esp.available()) {
      // The esp has data so display its output to the serial window
      char c = esp.read(); // read the next character.
      Serial.write(c);
}
Serial.println("");

How to display IP in serial monitor using AT command with ESP8266 in Arduino?

1 个答案: