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PersWiFiManager.cpp
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PersWiFiManager.cpp
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/* PersWiFiManager
version 3.0.1
https://r-downing.github.io/PersWiFiManager/
*/
#include "PersWiFiManager.h"
#if defined(ESP32)
#include <esp_wifi.h>
#endif
#ifdef WIFI_HTM_PROGMEM
const char wifi_htm[] PROGMEM = R"=====(
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"/>
<title>ESP WiFi</title>
<script>
function g(i){
return document.getElementById(i);
};
function p(t,l){
if(confirm(t)) window.location=l;
};
function E(s){
return document.createElement(s)
};
var S="setAttribute",A="appendChild",H="innerHTML",X,wl;
function scan(){
if(X) return;
X=new XMLHttpRequest(),wl=document.getElementById('wl');
wl[H]="Scanning...";
X.onreadystatechange=function(){
if (this.readyState==4&&this.status==200){
X=0;wl[H]="";
this.responseText.split("\n").forEach(function (e){
let t=e.split(","), s=t.slice(2).join(',');
var d=E('div'),i=E('a'),c=E('a');
i[S]('class','s');
c[S]('class','q');
i.onclick=function(){
g('s').value=s;
g('p').focus();
};
i[A](document.createTextNode(s));
c[H]=t[0]+"%"+(parseInt(t[1])?"\uD83D\uDD12":"\u26A0");
wl[A](i);
wl[A](c);
wl[A](document.createElement('br'));
});
}
};
X.open("GET","wifi/list",true);
X.send();
};
</script>
<style>
input{
padding:5px;font-size:1em;width:95%;
}
body{
text-align:center;font-family:verdana;background-color:black;color:white;
}
a{
color:#1fa3ec;
}
button{
border:0;border-radius:0.3em;background-color:#1fa3ec;color:#fff;
line-height:2.4em;font-size:1.2em;width:100%;display:block;
}
.q{
float:right;
}
.s{
display:inline-block;width:14em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
#wl{
line-height:1.5em;
}
</style>
</head>
<body>
<div style='text-align:left;display:inline-block;width:320px;padding:5px'>
<button onclick="scan()">↻ Scan</button>
<p id='wl'></p>
<form method='post' action='/wifi/connect'>
<input id='s' name='n' length=32 placeholder='SSID'>
<br>
<input id='p' name='p' length=64 type='password' placeholder='password'>
<br><br>
<button type='submit'>Connect</button>
</form>
<br><br>
<button onclick="p('Reboot device?','/wifi/rst')">Reboot</button>
<br>
<a href="javascript:history.back()">Back</a> |<a href="/">Home</a>
</div>
</body>
</html>
)=====";
#endif
#if defined(ESP8266)
PersWiFiManager::PersWiFiManager(ESP8266WebServer& s, DNSServer& d) {
#elif defined(ESP32)
PersWiFiManager::PersWiFiManager(WebServer& s, DNSServer& d) {
#endif
_server = &s;
_dnsServer = &d;
_apPass = "";
_freshConnectionAttempt = false;
} //PersWiFiManager
bool PersWiFiManager::attemptConnection(const String& ssid, const String& pass) {
//attempt to connect to wifi
WiFi.mode(WIFI_STA);
if (ssid.length()) {
resetSettings(); // To avoid issues (experience from WiFiManager)
if (pass.length()) WiFi.begin(ssid.c_str(), pass.c_str());
else WiFi.begin(ssid.c_str());
} else {
if((getSsid() == "") && (WiFi.status() != WL_CONNECTED)) { // No saved credentials, so skip trying to connect
_connectStartTime = millis();
_freshConnectionAttempt = true;
return false;
} else {
WiFi.begin();
}
}
//if in nonblock mode, skip this loop
_connectStartTime = millis();// + 1;
while (!_connectNonBlock && _connectStartTime) {
handleWiFi();
delay(10);
}
return (WiFi.status() == WL_CONNECTED);
} //attemptConnection
void PersWiFiManager::handleWiFi() {
if (!_connectStartTime) return;
if (WiFi.status() == WL_CONNECTED) {
_connectStartTime = 0;
if (_connectHandler) _connectHandler();
return;
}
//if failed or no saved SSID or no WiFi credentials were found or not connected and time is up
if ((WiFi.status() == WL_CONNECT_FAILED) || _freshConnectionAttempt || ((WiFi.status() != WL_CONNECTED) && ((millis() - _connectStartTime) > (1000 * WIFI_CONNECT_TIMEOUT)))) {
startApMode();
_connectStartTime = 0; //reset connect start time
_freshConnectionAttempt = false;
}
} //handleWiFi
void PersWiFiManager::startApMode(){
//start AP mode
IPAddress apIP(192, 168, 4, 1);
WiFi.mode(WIFI_AP);
WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
_apPass.length() ? WiFi.softAP(getApSsid().c_str(), _apPass.c_str()) : WiFi.softAP(getApSsid().c_str());
if (_apHandler) _apHandler();
}//startApMode
void PersWiFiManager::setConnectNonBlock(bool b) {
_connectNonBlock = b;
} //setConnectNonBlock
void PersWiFiManager::setupWiFiHandlers() {
IPAddress apIP(192, 168, 4, 1);
_dnsServer->setErrorReplyCode(DNSReplyCode::NoError);
_dnsServer->start((byte)53, "*", apIP); //used for captive portal in AP mode
_server->on("/wifi/list", [&] () {
//scan for wifi networks
int n = WiFi.scanNetworks();
//build array of indices
int ix[n];
for (int i = 0; i < n; i++) ix[i] = i;
//sort by signal strength
for (int i = 0; i < n; i++) for (int j = 1; j < n - i; j++) if (WiFi.RSSI(ix[j]) > WiFi.RSSI(ix[j - 1])) std::swap(ix[j], ix[j - 1]);
//remove duplicates
for (int i = 0; i < n; i++) for (int j = i + 1; j < n; j++) if (WiFi.SSID(ix[i]).equals(WiFi.SSID(ix[j])) && WiFi.encryptionType(ix[i]) == WiFi.encryptionType(ix[j])) ix[j] = -1;
//build plain text string of wifi info
//format [signal%]:[encrypted 0 or 1]:SSID
String s = "";
s.reserve(2050);
for (int i = 0; i < n && s.length() < 2000; i++) { //check s.length to limit memory usage
if (ix[i] != -1) {
#if defined(ESP8266)
s += String(i ? "\n" : "") + ((constrain(WiFi.RSSI(ix[i]), -100, -50) + 100) * 2) + ","
+ ((WiFi.encryptionType(ix[i]) == ENC_TYPE_NONE) ? 0 : 1) + "," + WiFi.SSID(ix[i]);
#elif defined(ESP32)
s += String(i ? "\n" : "") + ((constrain(WiFi.RSSI(ix[i]), -100, -50) + 100) * 2) + ","
+ ((WiFi.encryptionType(ix[i]) == WIFI_AUTH_OPEN) ? 0 : 1) + "," + WiFi.SSID(ix[i]);
#endif
}
}
//send string to client
_server->send(200, "text/plain", s);
}); //_server->on /wifi/list
_server->on("/wifi/connect", [&]() {
_server->send(200, "text/html", "connecting...");
attemptConnection(_server->arg("n"), _server->arg("p"));
}); //_server->on /wifi/connect
_server->on("/wifi/ap", [&](){
_server->send(200, "text/html", "access point: "+getApSsid());
startApMode();
}); //_server->on /wifi/ap
_server->on("/wifi/rst", [&]() {
_server->send(200, "text/html", "Rebooting...");
delay(100);
//ESP.restart();
// Adding Safer Restart method
#if defined(ESP8266)
ESP.wdtDisable();
ESP.reset();
#elif defined(ESP32)
ESP.restart();
#endif
delay(2000);
});
#ifdef WIFI_HTM_PROGMEM
_server->on("/wifi.htm", [&]() {
_server->sendHeader("Cache-Control", " no-cache, no-store, must-revalidate");
_server->sendHeader("Expires", " 0");
_server->send(200, "text/html", wifi_htm);
});
#endif
}//setupWiFiHandlers
bool PersWiFiManager::begin(const String& ssid, const String& pass) {
#if defined(ESP32)
WiFi.mode(WIFI_STA); // ESP32 needs this before setupWiFiHandlers(). Might be good for ESP8266 too?
#endif
setupWiFiHandlers();
return attemptConnection(ssid, pass); //switched order of these two for return
} //begin
void PersWiFiManager::resetSettings() {
#if defined(ESP8266)
WiFi.disconnect();
#elif defined(ESP32)
wifi_mode_t m = WiFi.getMode();
if(!(m & WIFI_MODE_STA)) WiFi.mode(WIFI_STA);
WiFi.disconnect(false, true);
if(!(m & WIFI_MODE_STA)) WiFi.mode(m);
#endif
} // resetSettings
String PersWiFiManager::getApSsid() {
#if defined(ESP8266)
return _apSsid.length() ? _apSsid : "ESP8266";
#elif defined(ESP32)
return _apSsid.length() ? _apSsid : "ESP32";
#endif
} //getApSsid
String PersWiFiManager::getSsid() {
#if defined(ESP8266)
return WiFi.SSID();
#elif defined(ESP32)
wifi_config_t conf;
esp_wifi_get_config(WIFI_IF_STA, &conf); // load wifi settings to struct comf
const char *SSID = reinterpret_cast<const char*>(conf.sta.ssid);
return String(SSID);
#endif
} //getSsid
void PersWiFiManager::setApCredentials(const String& apSsid, const String& apPass) {
if (apSsid.length()) _apSsid = apSsid;
if (apPass.length() >= 8) _apPass = apPass;
} //setApCredentials
void PersWiFiManager::onConnect(WiFiChangeHandlerFunction fn) {
_connectHandler = fn;
}
void PersWiFiManager::onAp(WiFiChangeHandlerFunction fn) {
_apHandler = fn;
}