fix: follow spec for zxing qr code generation (#2540)

src/activities/network/CrossPointWebServerActivity.cpp

@@ -410,7 +410,8 @@ void CrossPointWebServerActivity::renderServerRunning() const {
     startY += height10 + metrics.verticalSpacing * 2;
 
     // Show QR code for Wifi
-    const std::string wifiConfig = std::string("WIFI:S:") + connectedSSID + ";;";
+    // follows spec at https://github.com/zxing/zxing/wiki/Barcode-Contents#wi-fi-network-config-android-ios-11
+    const std::string wifiConfig = std::string("WIFI:T:nopass;S:") + connectedSSID + ";;";
     const Rect qrBoundsWifi(metrics.contentSidePadding, startY, QR_CODE_WIDTH, QR_CODE_HEIGHT);
     QrUtils::drawQrCode(renderer, qrBoundsWifi, wifiConfig);