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edited Aug 6, 2020 at 17:10

Invoke HTTP request using AT Command, but I am getting output as ">" which I am not able to get as why the output is like this:

// #include <SoftwareSerial.h>

SoftwareSerial ESP8266(2, 3);

String Network = "xyz"; String Password = "xyz";

void setup() {

Serial.begin(9600);

ESP8266.begin(115200); ESP8266.println("AT+CIOBAUD=9600"); readESP8266(4000);

ESP8266.begin(9600); InitESP8266(); ConnectToWebsite(); }

void loop() { while(ESP8266.available()) {
Serial.println(ESP8266.readString()); }

}

/* Function to initialise ESP8266 */ void InitESP8266() {

ESP8266.println("AT"); readESP8266(2000);

ESP8266.println("AT+CWMODE=3"); //Wifi mode readESP8266(5000);

ESP8266.println("AT+CWJAP=""+ Network + "","" + Password +"""); //connect wifi readESP8266(10000);

ESP8266.println("AT+CIFSR"); // IP adress readESP8266(1000);

ESP8266.println("AT+CIPMUX=1"); // multiple connections readESP8266(1000);

}

/* Function to connect to the server */ void ConnectToWebsite() {

ESP8266.println("AT+CIPSTART=1,"TCP","jsonplaceholder.typicode.com",80"); //connect to website readESP8266(10000);

ESP8266.println("AT+CIPSEND=1,114"); readESP8266(2000);

String httpreq = "GET /posts/1 HTTP/1.1"; // Make a HTTP request: ESP8266.println(httpreq); readESP8266(10000);

readESP8266(5000);

//Serial.println("\r\n"); }

//read and display message void readESP8266(const int timeout) { String reponse = ""; long int time = millis(); while( (time+timeout) > millis()) { while(ESP8266.available()) { char c = ESP8266.read(); reponse+=c; } } Serial.print(reponse);
}

#include <SoftwareSerial.h>

SoftwareSerial ESP8266(2, 3);

String Network = "xyz";
String Password = "xyz";


void setup()
{

  Serial.begin(9600);

  ESP8266.begin(115200);
  ESP8266.println("AT+CIOBAUD=9600");
  readESP8266(4000);

  ESP8266.begin(9600); 
  InitESP8266();
  ConnectToWebsite();
}

void loop()
{
   while(ESP8266.available())
   {   
     Serial.println(ESP8266.readString());
   } 

}

/* Function to initialise ESP8266 */
void InitESP8266()
{ 

  ESP8266.println("AT");
  readESP8266(2000);

  ESP8266.println("AT+CWMODE=3"); //Wifi mode
  readESP8266(5000);

  ESP8266.println("AT+CWJAP=\""+ Network + "\",\"" + Password +"\""); //connect wifi
  readESP8266(10000);

  ESP8266.println("AT+CIFSR"); // IP adress
  readESP8266(1000);

  ESP8266.println("AT+CIPMUX=1");  // multiple connections
  readESP8266(1000);

}

/* Function to connect to the server */
void ConnectToWebsite()
{

  ESP8266.println("AT+CIPSTART=1,\"TCP\",\"jsonplaceholder.typicode.com\",80"); //connect to website
  readESP8266(10000);

  ESP8266.println("AT+CIPSEND=1,114");
  readESP8266(2000);

  String httpreq = "GET /posts/1 HTTP/1.1";
  // Make a HTTP request:
  ESP8266.println(httpreq);
  readESP8266(10000);

  readESP8266(5000);

  //Serial.println("\r\n");
}


//read and display message
void readESP8266(const int timeout)
{
  String reponse = "";
  long int time = millis();
  while( (time+timeout) > millis())
  {
    while(ESP8266.available())
    {
      char c = ESP8266.read();
      reponse+=c;
    }
  }
  Serial.print(reponse);   
}````

If I use WIFI ESP then I am getting following error

#include "WiFiEsp.h"

// Emulate Serial1 on pins 6/7 if not present #ifndef HAVE_HWSERIAL1 #include "SoftwareSerial.h" SoftwareSerial Serial1(2, 3); // RX, TX #endif

char ssid[] = "xyz"; // your network SSID (name) char pass[] = "xyz"; // your network password int status = WL_IDLE_STATUS; // the Wifi radio's status

char server[] = "arduino.cc";

// Initialize the Ethernet client object WiFiEspClient client;

void setup() { // initialize serial for debugging Serial.begin(115200); // initialize serial for ESP module Serial1.begin(9600); // initialize ESP module WiFi.init(&Serial1);

// check for the presence of the shield if (WiFi.status() == WL_NO_SHIELD) { Serial.println("WiFi shield not present"); // don't continue //while (true); }

// attempt to connect to WiFi network while ( status != WL_CONNECTED) { Serial.print("Attempting to connect to WPA SSID: "); Serial.println(ssid); // Connect to WPA/WPA2 network status = WiFi.begin(ssid, pass); }

// you're connected now, so print out the data Serial.println("You're connected to the network");

printWifiStatus();

Serial.println(); Serial.println("Starting connection to server..."); // if you get a connection, report back via serial if (client.connect(server, 80)) { Serial.println("Connected to server"); // Make a HTTP request client.println("GET /asciilogo.txt HTTP/1.1"); client.println("Host: arduino.cc"); client.println("Connection: close"); client.println(); } }

void loop() { // if there are incoming bytes available // from the server, read them and print them while (client.available()) { char c = client.read(); Serial.write(c); }

// if the server's disconnected, stop the client if (!client.connected()) { Serial.println(); Serial.println("Disconnecting from server..."); client.stop();

 // do nothing forevermore
 while (true);

} }

void printWifiStatus() { // print the SSID of the network you're attached to Serial.print("SSID: "); Serial.println(WiFi.SSID());

// print your WiFi shield's IP address IPAddress ip = WiFi.localIP(); Serial.print("IP Address: "); Serial.println(ip);

// print the received signal strength long rssi = WiFi.RSSI(); Serial.print("Signal strength (RSSI):"); Serial.print(rssi); Serial.println(" dBm"); }


// Emulate Serial1 on pins 6/7 if not present
#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
SoftwareSerial Serial1(2, 3); // RX, TX
#endif

char ssid[] = "xyz";            // your network SSID (name)
char pass[] = "xyz";        // your network password
int status = WL_IDLE_STATUS;     // the Wifi radio's status

char server[] = "arduino.cc";

// Initialize the Ethernet client object
WiFiEspClient client;

void setup()
{
  // initialize serial for debugging
  Serial.begin(115200);
  // initialize serial for ESP module
  Serial1.begin(9600);
  // initialize ESP module
  WiFi.init(&Serial1);

  // check for the presence of the shield
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue
    //while (true);
  }

  // attempt to connect to WiFi network
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to WPA SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network
    status = WiFi.begin(ssid, pass);
  }

  // you're connected now, so print out the data
  Serial.println("You're connected to the network");

  printWifiStatus();

  Serial.println();
  Serial.println("Starting connection to server...");
  // if you get a connection, report back via serial
  if (client.connect(server, 80)) {
    Serial.println("Connected to server");
    // Make a HTTP request
    client.println("GET /asciilogo.txt HTTP/1.1");
    client.println("Host: arduino.cc");
    client.println("Connection: close");
    client.println();
  }
}

void loop()
{
  // if there are incoming bytes available
  // from the server, read them and print them
  while (client.available()) {
    char c = client.read();
    Serial.write(c);
  }

  // if the server's disconnected, stop the client
  if (!client.connected()) {
    Serial.println();
    Serial.println("Disconnecting from server...");
    client.stop();

    // do nothing forevermore
    while (true);
  }
}


void printWifiStatus()
{
  // print the SSID of the network you're attached to
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  // print the received signal strength
  long rssi = WiFi.RSSI();
  Serial.print("Signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}````

WiFiEsp]````[WiFiEsp] I >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Initializing ESP module
[WiFiEsp] >>> TIMEOUT >>> 
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Cannot initialize ESP module
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] No tag found
WiFi shield not present
Attempting to connect to WPA SSID: xyz
[WiFiEsp] >>> TIMEOUT >>>

Please let me know in case you figure out the issue. [WiFiEsp] >>> TIMEOUT >>> [WiFiEsp] >>> TIMEOUT >>> [WiFiEsp] >>> TIMEOUT >>> [WiFiEsp] >>> TIMEOUT >>> [WiFiEsp] Cannot initialize ESP module [WiFiEsp] >>> TIMEOUT >>> [WiFiEsp] No tag found WiFi shield not present Attempting to connect to WPA SSID: xyz [WiFiEsp] >>> TIMEOUT >>>

Please let me know in case you figure out the issue.

Invoke HTTP request using AT Command, but I am getting output as ">" which I am not able to get as why the output is like this:

// #include <SoftwareSerial.h>

SoftwareSerial ESP8266(2, 3);

String Network = "xyz"; String Password = "xyz";

void setup() {

Serial.begin(9600);

ESP8266.begin(115200); ESP8266.println("AT+CIOBAUD=9600"); readESP8266(4000);

ESP8266.begin(9600); InitESP8266(); ConnectToWebsite(); }

void loop() { while(ESP8266.available()) {
Serial.println(ESP8266.readString()); }

}

/* Function to initialise ESP8266 */ void InitESP8266() {

ESP8266.println("AT"); readESP8266(2000);

ESP8266.println("AT+CWMODE=3"); //Wifi mode readESP8266(5000);

ESP8266.println("AT+CWJAP=""+ Network + "","" + Password +"""); //connect wifi readESP8266(10000);

ESP8266.println("AT+CIFSR"); // IP adress readESP8266(1000);

ESP8266.println("AT+CIPMUX=1"); // multiple connections readESP8266(1000);

}

/* Function to connect to the server */ void ConnectToWebsite() {

ESP8266.println("AT+CIPSTART=1,"TCP","jsonplaceholder.typicode.com",80"); //connect to website readESP8266(10000);

ESP8266.println("AT+CIPSEND=1,114"); readESP8266(2000);

String httpreq = "GET /posts/1 HTTP/1.1"; // Make a HTTP request: ESP8266.println(httpreq); readESP8266(10000);

readESP8266(5000);

//Serial.println("\r\n"); }

//read and display message void readESP8266(const int timeout) { String reponse = ""; long int time = millis(); while( (time+timeout) > millis()) { while(ESP8266.available()) { char c = ESP8266.read(); reponse+=c; } } Serial.print(reponse);
}

If I use WIFI ESP then I am getting following error

#include "WiFiEsp.h"

// Emulate Serial1 on pins 6/7 if not present #ifndef HAVE_HWSERIAL1 #include "SoftwareSerial.h" SoftwareSerial Serial1(2, 3); // RX, TX #endif

char ssid[] = "xyz"; // your network SSID (name) char pass[] = "xyz"; // your network password int status = WL_IDLE_STATUS; // the Wifi radio's status

char server[] = "arduino.cc";

// Initialize the Ethernet client object WiFiEspClient client;

void setup() { // initialize serial for debugging Serial.begin(115200); // initialize serial for ESP module Serial1.begin(9600); // initialize ESP module WiFi.init(&Serial1);

// check for the presence of the shield if (WiFi.status() == WL_NO_SHIELD) { Serial.println("WiFi shield not present"); // don't continue //while (true); }

// attempt to connect to WiFi network while ( status != WL_CONNECTED) { Serial.print("Attempting to connect to WPA SSID: "); Serial.println(ssid); // Connect to WPA/WPA2 network status = WiFi.begin(ssid, pass); }

// you're connected now, so print out the data Serial.println("You're connected to the network");

printWifiStatus();

Serial.println(); Serial.println("Starting connection to server..."); // if you get a connection, report back via serial if (client.connect(server, 80)) { Serial.println("Connected to server"); // Make a HTTP request client.println("GET /asciilogo.txt HTTP/1.1"); client.println("Host: arduino.cc"); client.println("Connection: close"); client.println(); } }

void loop() { // if there are incoming bytes available // from the server, read them and print them while (client.available()) { char c = client.read(); Serial.write(c); }

// if the server's disconnected, stop the client if (!client.connected()) { Serial.println(); Serial.println("Disconnecting from server..."); client.stop();
```
 // do nothing forevermore
 while (true);
```
} }

void printWifiStatus() { // print the SSID of the network you're attached to Serial.print("SSID: "); Serial.println(WiFi.SSID());

// print your WiFi shield's IP address IPAddress ip = WiFi.localIP(); Serial.print("IP Address: "); Serial.println(ip);

// print the received signal strength long rssi = WiFi.RSSI(); Serial.print("Signal strength (RSSI):"); Serial.print(rssi); Serial.println(" dBm"); }

WiFiEsp] I >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Initializing ESP module
[WiFiEsp] >>> TIMEOUT >>>

Invoke HTTP request using AT Command, but I am getting output as ">" which I am not able to get as why the output is like this:

#include <SoftwareSerial.h>

SoftwareSerial ESP8266(2, 3);

String Network = "xyz";
String Password = "xyz";


void setup()
{

  Serial.begin(9600);

  ESP8266.begin(115200);
  ESP8266.println("AT+CIOBAUD=9600");
  readESP8266(4000);

  ESP8266.begin(9600); 
  InitESP8266();
  ConnectToWebsite();
}

void loop()
{
   while(ESP8266.available())
   {   
     Serial.println(ESP8266.readString());
   } 

}

/* Function to initialise ESP8266 */
void InitESP8266()
{ 

  ESP8266.println("AT");
  readESP8266(2000);

  ESP8266.println("AT+CWMODE=3"); //Wifi mode
  readESP8266(5000);

  ESP8266.println("AT+CWJAP=\""+ Network + "\",\"" + Password +"\""); //connect wifi
  readESP8266(10000);

  ESP8266.println("AT+CIFSR"); // IP adress
  readESP8266(1000);

  ESP8266.println("AT+CIPMUX=1");  // multiple connections
  readESP8266(1000);

}

/* Function to connect to the server */
void ConnectToWebsite()
{

  ESP8266.println("AT+CIPSTART=1,\"TCP\",\"jsonplaceholder.typicode.com\",80"); //connect to website
  readESP8266(10000);

  ESP8266.println("AT+CIPSEND=1,114");
  readESP8266(2000);

  String httpreq = "GET /posts/1 HTTP/1.1";
  // Make a HTTP request:
  ESP8266.println(httpreq);
  readESP8266(10000);

  readESP8266(5000);

  //Serial.println("\r\n");
}


//read and display message
void readESP8266(const int timeout)
{
  String reponse = "";
  long int time = millis();
  while( (time+timeout) > millis())
  {
    while(ESP8266.available())
    {
      char c = ESP8266.read();
      reponse+=c;
    }
  }
  Serial.print(reponse);   
}````

If I use WIFI ESP then I am getting following error


// Emulate Serial1 on pins 6/7 if not present
#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
SoftwareSerial Serial1(2, 3); // RX, TX
#endif

char ssid[] = "xyz";            // your network SSID (name)
char pass[] = "xyz";        // your network password
int status = WL_IDLE_STATUS;     // the Wifi radio's status

char server[] = "arduino.cc";

// Initialize the Ethernet client object
WiFiEspClient client;

void setup()
{
  // initialize serial for debugging
  Serial.begin(115200);
  // initialize serial for ESP module
  Serial1.begin(9600);
  // initialize ESP module
  WiFi.init(&Serial1);

  // check for the presence of the shield
  if (WiFi.status() == WL_NO_SHIELD) {
    Serial.println("WiFi shield not present");
    // don't continue
    //while (true);
  }

  // attempt to connect to WiFi network
  while ( status != WL_CONNECTED) {
    Serial.print("Attempting to connect to WPA SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network
    status = WiFi.begin(ssid, pass);
  }

  // you're connected now, so print out the data
  Serial.println("You're connected to the network");

  printWifiStatus();

  Serial.println();
  Serial.println("Starting connection to server...");
  // if you get a connection, report back via serial
  if (client.connect(server, 80)) {
    Serial.println("Connected to server");
    // Make a HTTP request
    client.println("GET /asciilogo.txt HTTP/1.1");
    client.println("Host: arduino.cc");
    client.println("Connection: close");
    client.println();
  }
}

void loop()
{
  // if there are incoming bytes available
  // from the server, read them and print them
  while (client.available()) {
    char c = client.read();
    Serial.write(c);
  }

  // if the server's disconnected, stop the client
  if (!client.connected()) {
    Serial.println();
    Serial.println("Disconnecting from server...");
    client.stop();

    // do nothing forevermore
    while (true);
  }
}


void printWifiStatus()
{
  // print the SSID of the network you're attached to
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  // print the received signal strength
  long rssi = WiFi.RSSI();
  Serial.print("Signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm");
}````

````[WiFiEsp] I >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Initializing ESP module
[WiFiEsp] >>> TIMEOUT >>> 
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Cannot initialize ESP module
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] No tag found
WiFi shield not present
Attempting to connect to WPA SSID: xyz
[WiFiEsp] >>> TIMEOUT >>>

Please let me know in case you figure out the issue.

Source Link

asked Aug 6, 2020 at 13:45

Rajesh

How to easily invoke Simple REST Service trigerred using Arduino UNO + ESP8266 WIFI Shield programmed with AT command?

My Question is How to easily invoke Simple REST Service trigerred using Arduino UNO + ESP8266 WIFI Shield programmed with AT command? I am new to this Subject and gone through many tutorial over internet but so far I could not making this working as per my requirement

My Requirement: Invoke a simple Get request originated from Arduino Uno and via ESP8266 WIFI Shield to submit to server and process the response.

What all I have done so far:

Used below Blynk example to Submit Up time to the Server and View in MobileThis is Working which means hardware setup at my side should be ok, but I dont want to Submit request to Blynk Server and I want to Submit request to my REST server and first of all I want to do a simple GET request may be to any already working API for ex: http://jsonplaceholder.typicode.com/posts/1

#define BLYNK_PRINT Serial
 #include <ESP8266_Lib.h>
 #include <BlynkSimpleShieldEsp8266.h>

 // You should get Auth Token in the Blynk App.
 // Go to the Project Settings (nut icon).
 char auth[] = "xyz";

 // Your WiFi credentials.
 // Set password to "" for open networks.
 char ssid[] = "xyz";
 char pass[] = "xyz";

 // Hardware Serial on Mega, Leonardo, Micro...
 //#define EspSerial Serial1

 // or Software Serial on Uno, Nano...
 #include <SoftwareSerial.h>
 SoftwareSerial EspSerial(2, 3); // RX, TX

 // Your ESP8266 baud rate:
 #define ESP8266_BAUD 115200

 ESP8266 wifi(&EspSerial);

 BlynkTimer timer;

 void myTimerEvent()
 {
   // You can send any value at any time.
   // Please don't send more that 10 values per second.
   Blynk.virtualWrite(V5, millis() / 1000);
 }

 void setup()
 {
   // Debug console
   Serial.begin(115200);

   // Set ESP8266 baud rate
   EspSerial.begin(ESP8266_BAUD);
   delay(10);

   Blynk.begin(auth, wifi, ssid, pass);
   // You can also specify server:
   //Blynk.begin(auth, wifi, ssid, pass, "blynk-cloud.com", 80);
   //Blynk.begin(auth, wifi, ssid, pass, IPAddress(192,168,1,100), 8080);

   // Setup a function to be called every second
   timer.setInterval(1000L, myTimerEvent);
 }

 void loop()
 {
   Blynk.run();
   timer.run(); // Initiates BlynkTimer
 }

Output :

  ___  __          __
   / _ )/ /_ _____  / /__
  / _  / / // / _ \/  '_/
 /____/_/\_, /_//_/_/\_\
        /___/ v0.6.1 on Arduino Uno

[517] Connecting to xyz
[13550] AT version:1.1.0.0(May 11 2016 18:09:56)
SDK version:1.5.4(baaea 1
[23591] Failed to connect WiFi
[31752] Ready (ping: 11ms).
[70474] Ready (ping: 12ms).
[86528] Ready (ping: 13ms).

Though I get Failed to connect to wifi but probably it retries and works there after as I can see timer in Mobile APP which is progressing.

Invoke HTTP request using AT Command, but I am getting output as ">" which I am not able to get as why the output is like this:

// #include <SoftwareSerial.h>

SoftwareSerial ESP8266(2, 3);

String Network = "xyz"; String Password = "xyz";

void setup() {

Serial.begin(9600);

ESP8266.begin(115200); ESP8266.println("AT+CIOBAUD=9600"); readESP8266(4000);

ESP8266.begin(9600); InitESP8266(); ConnectToWebsite(); }

void loop() { while(ESP8266.available()) {
Serial.println(ESP8266.readString()); }

}

/* Function to initialise ESP8266 */ void InitESP8266() {

ESP8266.println("AT"); readESP8266(2000);

ESP8266.println("AT+CWMODE=3"); //Wifi mode readESP8266(5000);

ESP8266.println("AT+CWJAP=""+ Network + "","" + Password +"""); //connect wifi readESP8266(10000);

ESP8266.println("AT+CIFSR"); // IP adress readESP8266(1000);

ESP8266.println("AT+CIPMUX=1"); // multiple connections readESP8266(1000);

}

/* Function to connect to the server */ void ConnectToWebsite() {

ESP8266.println("AT+CIPSTART=1,"TCP","jsonplaceholder.typicode.com",80"); //connect to website readESP8266(10000);

ESP8266.println("AT+CIPSEND=1,114"); readESP8266(2000);

String httpreq = "GET /posts/1 HTTP/1.1"; // Make a HTTP request: ESP8266.println(httpreq); readESP8266(10000);

readESP8266(5000);

//Serial.println("\r\n"); }

//read and display message void readESP8266(const int timeout) { String reponse = ""; long int time = millis(); while( (time+timeout) > millis()) { while(ESP8266.available()) { char c = ESP8266.read(); reponse+=c; } } Serial.print(reponse);
}

Output:

OK

OK
WIFI DISCONNECT
WIFI CONNECTED
WIFI GOT IP

OK
+CIFSR:APIP,"192.168.4.1"
+CIFSR:APMAC,"abcd"
+CIFSR:STAIP,"192.168.0.169"
+CIFSR:STAMAC,"abcd"

OK

OK
1,CONNECT

OK

OK
> 1,CLOSED

If I use WIFI ESP then I am getting following error

#include "WiFiEsp.h"

// Emulate Serial1 on pins 6/7 if not present #ifndef HAVE_HWSERIAL1 #include "SoftwareSerial.h" SoftwareSerial Serial1(2, 3); // RX, TX #endif

char ssid[] = "xyz"; // your network SSID (name) char pass[] = "xyz"; // your network password int status = WL_IDLE_STATUS; // the Wifi radio's status

char server[] = "arduino.cc";

// Initialize the Ethernet client object WiFiEspClient client;

void setup() { // initialize serial for debugging Serial.begin(115200); // initialize serial for ESP module Serial1.begin(9600); // initialize ESP module WiFi.init(&Serial1);

// check for the presence of the shield if (WiFi.status() == WL_NO_SHIELD) { Serial.println("WiFi shield not present"); // don't continue //while (true); }

// attempt to connect to WiFi network while ( status != WL_CONNECTED) { Serial.print("Attempting to connect to WPA SSID: "); Serial.println(ssid); // Connect to WPA/WPA2 network status = WiFi.begin(ssid, pass); }

// you're connected now, so print out the data Serial.println("You're connected to the network");

printWifiStatus();

Serial.println(); Serial.println("Starting connection to server..."); // if you get a connection, report back via serial if (client.connect(server, 80)) { Serial.println("Connected to server"); // Make a HTTP request client.println("GET /asciilogo.txt HTTP/1.1"); client.println("Host: arduino.cc"); client.println("Connection: close"); client.println(); } }

void loop() { // if there are incoming bytes available // from the server, read them and print them while (client.available()) { char c = client.read(); Serial.write(c); }

// if the server's disconnected, stop the client if (!client.connected()) { Serial.println(); Serial.println("Disconnecting from server..."); client.stop();
```
 // do nothing forevermore
 while (true);
```
} }

void printWifiStatus() { // print the SSID of the network you're attached to Serial.print("SSID: "); Serial.println(WiFi.SSID());

// print your WiFi shield's IP address IPAddress ip = WiFi.localIP(); Serial.print("IP Address: "); Serial.println(ip);

// print the received signal strength long rssi = WiFi.RSSI(); Serial.print("Signal strength (RSSI):"); Serial.print(rssi); Serial.println(" dBm"); }

Output:

WiFiEsp] I >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Initializing ESP module
[WiFiEsp] >>> TIMEOUT >>>

arduino-uno esp8266