More Wifi functions

src/wifi.cpp

@@ -9,8 +9,10 @@
 #include <WiFiMulti.h>
 #include <ESPmDNS.h>
 #include <WiFiClient.h>
+#include <Preferences.h>
 
 // ToDo: check if https://github.com/me-no-dev/ESPAsyncWebServer/ becomes available
+// libwebsockets got ESP32 support in v2.2 !
 
 #include "hardware.h"
 #include "sound.h"
@@ -62,6 +64,41 @@ void Wifi::init() {
     MDNS.addService("http", "tcp", 80);
 }
 
+void Wifi::init_softap() {
+//    WiFi wifi;
+//    wifi.softAP("soundboard");
+}
+
+/* never used */ /*
+void Wifi::readPreferences() {
+    Preferences preferences;
+    preferences.begin("sb_wifi", false); // namespace limited to 15 chars!
+    for(uint8_t i=0; true; i++) {
+        char key[8];
+        sprintf(key, "ssid%d", i);
+        String ssid = preferences.getString(key); // max 31
+        sprintf(key, "pass%d", i);
+        String password = preferences.getString(key); // max 63
+    }
+    preferences.end();
+} */
+
+size_t Wifi::getStoredPassword(const char* ssid, char* value) {
+    Preferences preferences;
+    preferences.begin("sb_wifi-pwd", false);
+    size_t len = preferences.getString(ssid, value, 64);
+    preferences.end();
+    return len;
+}
+
+size_t Wifi::setStoredPassword(const char* ssid, char* value) {
+    Preferences preferences;
+    preferences.begin("sb_wifi-pwd", false);
+    size_t len = preferences.putString(ssid, value);
+    preferences.end();
+    return len;
+}
+
 void Wifi::loop() {
     // Check if a client has connected
     WiFiClient client = server.available();

src/wifi.h

@@ -17,8 +17,10 @@ class Wifi {
     void end();
     void loop();
 //    esp_err_t event_handler(void *ctx, system_event_t *event);
-//    void wifi_init_sta();
+//    void init_sta();
-//    void wifi_init_softap();
+    void init_softap();
+    size_t getStoredPassword(const char* ssid, char* value);
+    size_t setStoredPassword(const char* ssid, char* value);
   private:
     WiFiServer server;
 };