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PersWiFiManager.cpp
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/* PersWiFiManager
version 3.0.1
https://r-downing.github.io/PersWiFiManager/
modified for inclusion in gbs-control
see /3rdparty/PersWiFiManager/ for original code and license
*/
#if defined(ESP8266)
#include "PersWiFiManager.h"
#define WIFI_HTM_PROGMEM
#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
extern const char* device_hostname_full;
PersWiFiManager::PersWiFiManager(ESP8266WebServer& s, DNSServer& d) {
_server = &s;
_dnsServer = &d;
_apPass = "";
} //PersWiFiManager
bool PersWiFiManager::attemptConnection(const String& ssid, const String& pass) {
//attempt to connect to wifi
WiFi.mode(WIFI_STA);
WiFi.hostname(device_hostname_full); // before WiFi.begin();
if (ssid.length()) {
if (pass.length()) WiFi.begin(ssid.c_str(), pass.c_str());
else WiFi.begin(ssid.c_str());
} 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 not connected and time is up
if ((WiFi.status() == WL_CONNECT_FAILED) || ((WiFi.status() != WL_CONNECTED) && ((millis() - _connectStartTime) > (1000 * WIFI_CONNECT_TIMEOUT)))) {
startApMode();
_connectStartTime = 0; //reset connect start time
}
} //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(), 6) : WiFi.softAP(getApSsid().c_str());
_dnsServer->stop();
// set which return code will be used for all other domains (e.g. sending
// ServerFailure instead of NonExistentDomain will reduce number of queries
// sent by clients)
// default is DNSReplyCode::NonExistentDomain
_dnsServer->setErrorReplyCode(DNSReplyCode::ServerFailure);
// modify TTL associated with the domain name (in seconds) // default is 60 seconds
_dnsServer->setTTL(300); // (in seconds) as per example
_dnsServer->start((byte)53, device_hostname_full, apIP);
if (_apHandler) _apHandler();
}//startApMode
void PersWiFiManager::setConnectNonBlock(bool b) {
_connectNonBlock = b;
} //setConnectNonBlock
void PersWiFiManager::setupWiFiHandlers() {
// note: removed DNS server setup here
//_server->on("/", [&] () {
// _server->send(200, "text/html", FPSTR(HTML));
//});
_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) {
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]);
}
}
//send string to client
_server->send(200, "text/plain", s);
}); //_server->on /wifi/list
_server->on("/wifi/connect", [&]() {
Serial.println("connecting");
_server->send(200, "text/html", "connecting... please reset the ESP8266 in a few seconds");
_server->handleClient();
delay(100);
attemptConnection(_server->arg("n"), _server->arg("p"));
unsigned long to = millis();
while ((WiFi.status() != WL_CONNECTED) && ((millis() - to) < 10000)) {
delay(200);
Serial.print(".");
}
if (WiFi.status() == WL_CONNECTED) {
Serial.println("\nconnected");
delay(100);
}
// module should restart
ESP.restart();
}); //_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();
});
#ifdef WIFI_HTM_PROGMEM
_server->on("/wifi.htm", [&]() {
_server->send(200, "text/html", wifi_htm);
});
#endif
}//setupWiFiHandlers
bool PersWiFiManager::begin(const String& ssid, const String& pass) {
setupWiFiHandlers();
return attemptConnection(ssid, pass); //switched order of these two for return
} //begin
String PersWiFiManager::getApSsid() {
return _apSsid.length() ? _apSsid : "gbscontrol";
} //getApSsid
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;
}
#endif