Fix WiFi priority reconnect and password preservation

firmware/esp32/overland-controller/overland-controller.ino

@@ -338,6 +338,11 @@ void connectStaWifi() {
         Serial.print(" to: ");
         Serial.println(staSsids[i]);
 
+        WiFi.disconnect(false, false);
+        delay(500);
+        WiFi.mode(WIFI_AP_STA);
+        delay(250);
+
         WiFi.begin(staSsids[i].c_str(), staPasswords[i].c_str());
 
         unsigned long start = millis();
@@ -1018,6 +1023,22 @@ void handleDebugSerial() {
         return;
     }
 
+    if (command == "wifi list") {
+        Serial.println("Saved WiFi networks:");
+        for (int i = 0; i < wifiNetworkCount; i++) {
+            Serial.print("  ");
+            Serial.print(i + 1);
+            Serial.print(") priority ");
+            Serial.print(staPriorities[i]);
+            Serial.print(" / ");
+            Serial.print(staSsids[i]);
+            Serial.print(" / password_set ");
+            Serial.println(staPasswords[i].length() > 0 ? "true" : "false");
+        }
+        return;
+    }
+
+
     if (command.startsWith("wifi ssid ")) {
         staSsids[0] = command.substring(10);
         staPriorities[0] = 1;
@@ -1426,6 +1447,15 @@ void handleUpdateWifiConfig() {
                 continue;
             }
 
+            if (password.length() == 0) {
+                for (int oldIndex = 0; oldIndex < MAX_WIFI_NETWORKS; oldIndex++) {
+                    if (staSsids[oldIndex] == ssid && staPasswords[oldIndex].length() > 0) {
+                        password = staPasswords[oldIndex];
+                        break;
+                    }
+                }
+            }
+
             int priority = network["priority"] | (wifiNetworkCount + 1);
             if (priority <= 0) priority = wifiNetworkCount + 1;