#include "FS.h"
#include "esp_system.h"
#include <esp_wifi.h>
#include <string.h>
#include <WiFi.h>
#include <Preferences.h>? // WiFi storage
const? char* rssiSSID;? ? ? // NO MORE hard coded set AP, all SmartConfig
const? char* password;
String PrefSSID, PrefPassword;? // used by preferences storage
int? WFstatus;
int UpCount = 0;
int32_t rssi;? ? ? ? ? // store WiFi signal strength here
String getSsid;
String getPass;
String? MAC;
// SSID storage
Preferences preferences;? // declare class object
// END SSID storage
void setup() {
? Serial.begin(115200);
? Serial.printf("\tWiFi Setup -- \n"? );
? wifiInit();? ? ? // get WiFi connected
? IP_info();
? MAC = getMacAddress();
? delay(2000);
} //? END setup()
void loop() {
? if (WiFi.status() == WL_CONNECTED) {
? ? // ANY MAIN LOOP CODE HERE
? } else {
? ? //? wifi down start LED flasher here
? ? WFstatus = getWifiStatus( WFstatus );
? ? WiFi.begin( PrefSSID.c_str() , PrefPassword.c_str() );
? ? int WLcount = 0;
? ? while (WiFi.status() != WL_CONNECTED && WLcount < 20 ) {
? ? ? delay( 100 );
? ? ? Serial.printf("!");
? ? ? if (UpCount >= 60) {
? ? ? ? // keep from scrolling sideways forever
? ? ? ? UpCount = 0;
? ? ? ? Serial.printf("\n");
? ? ? }
? ? ? ++UpCount;
? ? ? ++WLcount;
? ? }
? ? if ( getWifiStatus( WFstatus ) == 3 ) {
? ? ? // wifi returns
? ? ? // stop LED flasher, wifi going up
? ? }
? ? delay( 1000 );
? }
}
void wifiInit() {
? WiFi.mode(WIFI_AP_STA);? // required to read NVR before WiFi.begin()
? // load credentials from NVR, a little RTOS code here
? wifi_config_t conf;
? esp_wifi_get_config(WIFI_IF_STA, &conf);? // load wifi settings to struct comf
? rssiSSID = reinterpret_cast<const char*>(conf.sta.ssid);
? password = reinterpret_cast<const char*>(conf.sta.password);
? Serial.printf( "%s\n", rssiSSID );
? Serial.printf( "%s\n", password );
? // Open Preferences with "wifi" namespace. Namespace is limited to 15 chars
? preferences.begin("wifi", false);
? PrefSSID? ? ? ? ? =? preferences.getString("ssid", "none");? ? ? //NVS key ssid
? PrefPassword? =? preferences.getString("password", "none");? //NVS key password
? preferences.end();
? // keep from rewriting flash if not needed
? if ( !checkPrefsStore() )? ? // see is NV and Prefs are the same
? { // not the same, setup with SmartConfig
? ? if ( PrefSSID == "none" ) // New...setup wifi
? ? {
? ? ? initSmartConfig();
? ? ? delay( 3000);
? ? ? ESP.restart();? // reboot with wifi configured
? ? }
? }
? // I flash LEDs while connecting here
? WiFi.begin( PrefSSID.c_str() , PrefPassword.c_str() );
? int WLcount = 0;
? while (WiFi.status() != WL_CONNECTED && WLcount < 200 ) // can take > 100 loops depending on router settings
? {
? ? delay( 100 );
? ? Serial.printf(".");
? ? ++WLcount;
? }
? delay( 3000 );
? //? stop the led flasher here
}? // END wifiInit()
// match WiFi IDs in NVS to Pref store,? assumes WiFi.mode(WIFI_AP_STA);? was executed
bool checkPrefsStore() {
? bool val = false;
? String NVssid, NVpass, prefssid, prefpass;
? NVssid = getSsidPass( "ssid" );
? NVpass = getSsidPass( "pass" );
? // Open Preferences with my-app namespace. Namespace name is limited to 15 chars
? preferences.begin("wifi", false);
? prefssid? =? preferences.getString("ssid", "none");? ? //NVS key ssid
? prefpass? =? preferences.getString("password", "none"); //NVS key password
? preferences.end();
? if ( NVssid.equals(prefssid) && NVpass.equals(prefpass) )
? {
? ? val = true;
? }
? return val;
}
// optionally call this function any way you want in your own code
// to remap WiFi to another AP using SmartConfig mode.? Button, condition etc..
void initSmartConfig()
{
? // start LED flasher
? int loopCounter = 0;
? WiFi.mode( WIFI_AP_STA );? ? ? //Init WiFi, start SmartConfig
? Serial.printf( "Entering SmartConfig\n" );
? WiFi.beginSmartConfig();
? while (!WiFi.smartConfigDone())
? {
? ? // flash led to indicate not configured
? ? Serial.printf( "." );
? ? if ( loopCounter >= 40 ) // keep from scrolling sideways forever
? ? {
? ? ? loopCounter = 0;
? ? ? Serial.printf( "\n" );
? ? }
? ? delay(600);
? ? ++loopCounter;
? }
? loopCounter = 0;
? // stopped flasher here
? Serial.printf("\nSmartConfig received.\n Waiting for WiFi\n\n");
? delay(2000 );
? while ( WiFi.status() != WL_CONNECTED )? ? // check till connected
? {
? ? delay(500);
? }
? IP_info();? // connected lets see IP info
? preferences.begin("wifi", false);? ? ? // put it in storage
? preferences.putString( "ssid"? ? ? ? , getSsid);
? preferences.putString( "password", getPass);
? preferences.end();
? delay(300);
}? // END SmartConfig()
void IP_info()
{
? getSsid = WiFi.SSID();
? getPass = WiFi.psk();
? rssi = getRSSI(? rssiSSID );
? WFstatus = getWifiStatus( WFstatus );
? MAC = getMacAddress();
? Serial.printf( "\n\n\tSSID\t%s, ", getSsid.c_str() );
? Serial.print( rssi);? Serial.printf(" dBm\n" );? // printf??
? Serial.printf( "\tPass:\t %s\n", getPass.c_str() );
? Serial.print( "\n\n\tIP address:\t" );? Serial.print(WiFi.localIP() );
? Serial.print( " / " );
? Serial.println( WiFi.subnetMask() );
? Serial.print( "\tGateway IP:\t" );? Serial.println( WiFi.gatewayIP() );
? Serial.print( "\t1st DNS:\t" );? ? Serial.println( WiFi.dnsIP() );
? Serial.printf( "\tMAC:\t\t%s\n", MAC.c_str() );
}
int getWifiStatus( int WiFiStatus? )
{
? WiFiStatus = WiFi.status();
? Serial.printf("\tStatus %d",? WiFiStatus );
? switch ( WiFiStatus )
? {
? ? case WL_IDLE_STATUS :? ? ? ? ? ? ? ? ? ? ? ? // WL_IDLE_STATUS? ? = 0,
? ? ? Serial.printf(", WiFi IDLE \n");
? ? ? break;
? ? case WL_NO_SSID_AVAIL:? ? ? ? ? ? ? ? ? ? ? ? // WL_NO_SSID_AVAIL? = 1,
? ? ? Serial.printf(", NO SSID AVAIL \n");
? ? ? break;
? ? case WL_SCAN_COMPLETED:? ? ? ? ? ? ? ? ? ? ? // WL_SCAN_COMPLETED? = 2,
? ? ? Serial.printf(", WiFi SCAN_COMPLETED \n");
? ? ? break;
? ? case WL_CONNECTED:? ? ? ? ? ? ? ? ? ? ? ? ? ? // WL_CONNECTED? ? ? = 3,
? ? ? Serial.printf(", WiFi CONNECTED \n");
? ? ? break;
? ? case WL_CONNECT_FAILED:? ? ? ? ? ? ? ? ? ? ? // WL_CONNECT_FAILED? = 4,
? ? ? Serial.printf(", WiFi WL_CONNECT FAILED\n");
? ? ? break;
? ? case WL_CONNECTION_LOST:? ? ? ? ? ? ? ? ? ? ? // WL_CONNECTION_LOST = 5,
? ? ? Serial.printf(", WiFi CONNECTION LOST\n");
? ? ? WiFi.persistent(false);? ? ? ? ? ? ? ? // don't write FLASH
? ? ? break;
? ? case WL_DISCONNECTED:? ? ? ? ? ? ? ? ? ? ? ? // WL_DISCONNECTED? ? = 6
? ? ? Serial.printf(", WiFi DISCONNECTED ==\n");
? ? ? WiFi.persistent(false);? ? ? ? ? ? ? ? // don't write FLASH when reconnecting
? ? ? break;
? }
? return WiFiStatus;
}
// END getWifiStatus()
// Get the station interface MAC address.
// @return String MAC
String getMacAddress(void)
{
? WiFi.mode(WIFI_AP_STA);? ? ? ? ? ? ? ? ? ? // required to read NVR before WiFi.begin()
? uint8_t baseMac[6];
? esp_read_mac( baseMac, ESP_MAC_WIFI_STA ); // Get MAC address for WiFi station
? char macStr[18] = { 0 };
? sprintf(macStr, "%02X:%02X:%02X:%02X:%02X:%02X", baseMac[0], baseMac[1], baseMac[2], baseMac[3], baseMac[4], baseMac[5]);
? return String(macStr);
}
// END getMacAddress()
// Return RSSI or 0 if target SSID not found
// const char* SSID = "YOUR_SSID";? // declare in GLOBAL space
// call:? int32_t rssi = getRSSI( SSID );
int32_t getRSSI( const char* target_ssid )
{
? byte available_networks = WiFi.scanNetworks();
? for (int network = 0; network < available_networks; network++)
? {
? ? if ( strcmp(? WiFi.SSID( network).c_str(), target_ssid ) == 0)
? ? {
? ? ? return WiFi.RSSI( network );
? ? }
? }
? return 0;
} //? END? getRSSI()
// Requires; #include <esp_wifi.h>
// Returns String NONE, ssid or pass arcording to request
// ie String var = getSsidPass( "pass" );
String getSsidPass( String s )
{
? String val = "NONE";? // return "NONE" if wrong key sent
? s.toUpperCase();
? if ( s.compareTo("SSID") == 0 )
? {
? ? wifi_config_t conf;
? ? esp_wifi_get_config( WIFI_IF_STA, &conf );
? ? val = String( reinterpret_cast<const char*>(conf.sta.ssid) );
? }
? if ( s.compareTo("PASS") == 0 )
? {
? ? wifi_config_t conf;
? ? esp_wifi_get_config( WIFI_IF_STA, &conf );
? ? val = String( reinterpret_cast<const char*>(conf.sta.password) );
? }
? return val;
}
