I have success using an Arduino Mega + 8266 connected at serial3 with this sketch.
/*
Arduino Mega 2560 + ESP-05(ESP8266)
ESP-05 running firmware:
AT version:0.40.0.0(Aug 8 2015 14:45:58)
SDK version:1.3.0
Ai-Thinker Technology Co.,Ltd.
Build:1.3.0.2 Sep 11 2015 11:48:04
Connection between Mega & ESP-05,
refer "Connect with Arduino Mega 2560 via Level Converter" in:
http://goo.gl/wtG89i
Mega + ESP_05 act as station, join WiFi AP of my phone.
Once server setup, you can visit the webpage in ESP-05
by visit the IP show in Serial Monitor, under the command:
AT+CIFSR
+CIFSR:STAIP,"192.168.43.15"
If always show "Module have no response.",
check your connection, or reset ESP-05 by power OFF and ON.
*/
#define ASCII_0 48
#define ESP8266 Serial3
//WiFi hotspot setting on my phone
String SSID = "Neffos";
String PASSWORD = "password";
int LED = 10;
int RESET_8266 = 8;
boolean FAIL_8266 = false;
String strHTML1 = "<!doctype html>\
<html>\
<head>\
<title>arduino-er</title>\
</head>\
<body>\
<H1>Arduino web server</H1>";
String strHTML2 = "</body>\
</html>";
//String strHTML = "arduino-er.blogspot.com";
#define BUFFER_SIZE 128
char buffer[BUFFER_SIZE];
void setup() {
pinMode(LED, OUTPUT);
pinMode(RESET_8266, OUTPUT);
digitalWrite(RESET_8266, HIGH);
digitalWrite(LED, LOW);
delay(300);
digitalWrite(RESET_8266, LOW);
digitalWrite(LED, HIGH);
delay(200);
digitalWrite(LED, LOW);
delay(300);
digitalWrite(LED, HIGH);
delay(200);
digitalWrite(LED, LOW);
do{
Serial.begin(115200);
ESP8266.begin(115200);
//Wait Serial Monitor to start
while(!Serial);
Serial.println("--- Start ---");
ESP8266.println("AT+RST");
delay(1000);
if(ESP8266.find("ready"))
{
Serial.println("Module is ready");
ESP8266.println("AT+GMR");
delay(1000);
clearESP8266SerialBuffer();
ESP8266.println("AT+CWMODE=1");
delay(2000);
//Quit existing AP, for demo
Serial.println("Quit AP");
ESP8266.println("AT+CWQAP");
delay(1000);
clearESP8266SerialBuffer();
if(cwJoinAP())
{
Serial.println("CWJAP Success");
FAIL_8266 = false;
delay(3000);
clearESP8266SerialBuffer();
//Get and display my IP
sendESP8266Cmdln("AT+CIFSR", 1000);
//Set multi connections
sendESP8266Cmdln("AT+CIPMUX=1", 1000);
//Setup web server on port 80
sendESP8266Cmdln("AT+CIPSERVER=1,80",1000);
Serial.println("Server setup finish");
}else{
Serial.println("CWJAP Fail");
delay(500);
FAIL_8266 = true;
}
}else{
Serial.println("Module have no response.");
digitalWrite(RESET_8266, LOW);
digitalWrite(LED, HIGH);
delay(300);
digitalWrite(RESET_8266, HIGH);
digitalWrite(LED, LOW);
delay(200);
delay(500);
FAIL_8266 = true;
}
}while(FAIL_8266);
digitalWrite(LED, HIGH);
//set timeout duration ESP8266.readBytesUntil
ESP8266.setTimeout(1000);
}
void loop(){
int connectionId;
if(ESP8266.readBytesUntil('\n', buffer, BUFFER_SIZE)>0)
{
Serial.println("Something received");
Serial.println(buffer);
if(strncmp(buffer, "+IPD,", 5)==0){
Serial.println("+IPD, found");
sscanf(buffer+5, "%d", &connectionId);
Serial.println("connectionId: " + String(connectionId));
delay(1000);
clearESP8266SerialBuffer();
sendHTTPResponse(connectionId, strHTML1);
sendHTTPResponse(connectionId, "<hr/>-END-
");
sendHTTPResponse(connectionId, strHTML2);
//Close TCP/UDP
String cmdCIPCLOSE = "AT+CIPCLOSE=";
cmdCIPCLOSE += connectionId;
sendESP8266Cmdln(cmdCIPCLOSE, 1000);
}
}
}
void sendHTTPResponse(int id, String response)
{
String cmd = "AT+CIPSEND=";
cmd += id;
cmd += ",";
cmd += response.length();
Serial.println("--- AT+CIPSEND ---");
sendESP8266Cmdln(cmd, 1000);
Serial.println("--- data ---");
sendESP8266Data(response, 1000);
}
boolean waitOKfromESP8266(int timeout)
{
do{
Serial.println("wait OK...");
delay(1000);
if(ESP8266.find("OK"))
{
return true;
}
}while((timeout--)>0);
return false;
}
boolean cwJoinAP()
{
String cmd="AT+CWJAP=\"" + SSID + "\",\"" + PASSWORD + "\"";
ESP8266.println(cmd);
return waitOKfromESP8266(10);
}
//Send command to ESP8266, assume OK, no error check
//wait some time and display respond
void sendESP8266Cmdln(String cmd, int waitTime)
{
ESP8266.println(cmd);
delay(waitTime);
clearESP8266SerialBuffer();
}
//Basically same as sendESP8266Cmdln()
//But call ESP8266.print() instead of call ESP8266.println()
void sendESP8266Data(String data, int waitTime)
{
//ESP8266.print(data);
ESP8266.print(data);
delay(waitTime);
clearESP8266SerialBuffer();
}
//Clear and display Serial Buffer for ESP8266
void clearESP8266SerialBuffer()
{
Serial.println("= clearESP8266SerialBuffer() =");
while (ESP8266.available() > 0) {
char a = ESP8266.read();
Serial.write(a);
}
Serial.println("==============================");
}
open serial monitor at 115kb
active wifi hotspot of your smartphone.
String SSID = "Neffos"; is name of smartphone wifi hotspot
String PASSWORD = "password"; hotspot password
then oper browser on smartphone and surf ip address that read on serial monitor ;
browser show
Arduino web server
note: SoftwareSerial cannot work at 115kb.. use a real serial port (Mega has 4 serial ports)
