#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <EEPROM.h>
String str = "";
boolean conf = false;
String html_header = "<html>\
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\
<head>\
<title>ESP8266 Settings</title>\
<style>\
body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
</style>\
</head>";
ESP8266WebServer server(80);
void setup(void)
{
byte len_ssid, len_pass;
delay(1000);
Serial.begin(115200);
Serial.println();
EEPROM.begin(98);
len_ssid = EEPROM.read(96);
len_pass = EEPROM.read(97);
if(len_pass > 64) len_pass = 0;
pinMode(0, INPUT_PULLUP);
if((len_ssid < 33) && (len_ssid != 0)){
// Режим STATION
WiFi.mode( WIFI_STA);
unsigned char* buf_ssid = new unsigned char[32];
unsigned char* buf_pass = new unsigned char[64];
for(byte i = 0; i < len_ssid; i++) buf_ssid[i] = char(EEPROM.read(i));
buf_ssid[len_ssid] = '\x0';
const char *ssid = (const char*)buf_ssid;
for(byte i = 0; i < len_pass; i++) buf_pass[i] = char(EEPROM.read(i + 32));
const char *pass = (const char*)buf_pass;
buf_pass[len_pass] = '\x0';
Serial.print("SSID: ");
Serial.print(ssid);
Serial.print(" ");
Serial.print("Password: ");
Serial.println(pass);
WiFi.begin(ssid, pass);
// Wait for connection
while ( WiFi.status() != WL_CONNECTED ) {
delay ( 500 );
Serial.print ( "." );
}
Serial.println();
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
}
else // Режим SoftAP
{
const char *ssid_ap = "ESPap";
WiFi.mode(WIFI_AP);
Serial.print("Configuring access point...");
/* You can remove the password parameter if you want the AP to be open. */
WiFi.softAP(ssid_ap);
delay(2000);
Serial.println("done");
IPAddress myIP = WiFi.softAPIP();
Serial.print("AP IP address: ");
Serial.println(myIP);
server.on("/", handleRoot);
server.on("/ok", handleOk);
server.begin();
Serial.println("HTTP server started");
}
}
void loop() {
server.handleClient();
// Перевод модуля в режим конфигурации путем замыкания GPIO0 на массу
if((digitalRead(0) == LOW) && !conf){
EEPROM.write(96,255);
EEPROM.commit();
EEPROM.end();
conf = true;
Serial.println("Please reboot module for coniguration");
}
}
void handleRoot() {
String str = "";
str += html_header;
str += "<body>\
<form method=\"POST\" action=\"ok\">\
<input name=\"ssid\"> WIFI Net</br>\
<input name=\"pswd\"> Password</br></br>\
<input type=SUBMIT value=\"Save settings\">\
</form>\
</body>\
</html>";
server.send ( 200, "text/html", str );
}
void handleOk(){
String ssid_ap;
String pass_ap;
unsigned char* buf = new unsigned char[64];
String str = "";
str += html_header;
str += "<body>";
EEPROM.begin(98);
ssid_ap = server.arg(0);
pass_ap = server.arg(1);
if(ssid_ap != ""){
EEPROM.write(96,ssid_ap.length());
EEPROM.write(97,pass_ap.length());
ssid_ap.getBytes(buf, ssid_ap.length() + 1);
for(byte i = 0; i < ssid_ap.length(); i++)
EEPROM.write(i, buf[i]);
pass_ap.getBytes(buf, pass_ap.length() + 1);
for(byte i = 0; i < pass_ap.length(); i++)
EEPROM.write(i + 32, buf[i]);
EEPROM.commit();
EEPROM.end();
str +="Configuration saved in FLASH</br>\
Changes applied after reboot</p></br></br>\
<a href=\"/\">Return</a> to settings page</br>";
}
else {
str += "No WIFI Net</br>\
<a href=\"/\">Return</a> to settings page</br>";
}
str += "</body></html>";
server.send ( 200, "text/html", str );
}
). Выключение питания в данный момент не спасает от потери всех сохранений в таком EEPROM. + затраты памяти в 4 килобайта под буфер сектора.