Network details QR code (#113)

Using QRCode library from pio to generate the QR code.

Done:
- Display QR code for URL in network mode
- minor fixes of layout
- Display QR for URL in AP mode
- Display QR for AP in AP mode

---------

Co-authored-by: Dave Allie <dave@daveallie.com>

src/activities/network/CrossPointWebServerActivity.cpp

@@ -4,8 +4,12 @@
 #include <ESPmDNS.h>
 #include <GfxRenderer.h>
 #include <InputManager.h>
+#include <QrCode.h>
 #include <WiFi.h>
 
+#include <cstddef>
+#include <cstdint>
+
 #include "NetworkModeSelectionActivity.h"
 #include "WifiSelectionActivity.h"
 #include "config.h"
@@ -336,6 +340,28 @@ void CrossPointWebServerActivity::render() const {
   }
 }
 
+void drawQRCode(const GfxRenderer& renderer, const int x, const int y, const std::string& data) {
+  // Implementation of QR code calculation
+  // The structure to manage the QR code
+  QRCode qrcode;
+  uint8_t qrcodeBytes[qrcode_getBufferSize(4)];
+  Serial.printf("[%lu] [WEBACT] QR Code (%lu): %s\n", millis(), data.length(), data.c_str());
+
+  qrcode_initText(&qrcode, qrcodeBytes, 4, ECC_LOW, data.c_str());
+  const uint8_t px = 6;  // pixels per module
+  for (uint8_t cy = 0; cy < qrcode.size; cy++) {
+    for (uint8_t cx = 0; cx < qrcode.size; cx++) {
+      if (qrcode_getModule(&qrcode, cx, cy)) {
+        // Serial.print("**");
+        renderer.fillRect(x + px * cx, y + px * cy, px, px, true);
+      } else {
+        // Serial.print("  ");
+      }
+    }
+    // Serial.print("\n");
+  }
+}
+
 void CrossPointWebServerActivity::renderServerRunning() const {
   // Use consistent line spacing
   constexpr int LINE_SPACING = 28;  // Space between lines
@@ -344,7 +370,7 @@ void CrossPointWebServerActivity::renderServerRunning() const {
 
   if (isApMode) {
     // AP mode display - center the content block
-    const int startY = 55;
+    int startY = 55;
 
     renderer.drawCenteredText(UI_FONT_ID, startY, "Hotspot Mode", true, BOLD);
 
@@ -354,6 +380,13 @@ void CrossPointWebServerActivity::renderServerRunning() const {
     renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 2, "Connect your device to this WiFi network",
                               true, REGULAR);
 
+    renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 3,
+                              "or scan QR code with your phone to connect to Wifi.", true, REGULAR);
+    // Show QR code for URL
+    std::string wifiConfig = std::string("WIFI:T:WPA;S:") + connectedSSID + ";P:" + "" + ";;";
+    drawQRCode(renderer, (480 - 6 * 33) / 2, startY + LINE_SPACING * 4, wifiConfig);
+
+    startY += 6 * 29 + 3 * LINE_SPACING;
     // Show primary URL (hostname)
     std::string hostnameUrl = std::string("http://") + AP_HOSTNAME + ".local/";
     renderer.drawCenteredText(UI_FONT_ID, startY + LINE_SPACING * 3, hostnameUrl.c_str(), true, BOLD);
@@ -361,8 +394,12 @@ void CrossPointWebServerActivity::renderServerRunning() const {
     // Show IP address as fallback
     std::string ipUrl = "or http://" + connectedIP + "/";
     renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 4, ipUrl.c_str(), true, REGULAR);
-
     renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 5, "Open this URL in your browser", true, REGULAR);
+
+    // Show QR code for URL
+    renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 6, "or scan QR code with your phone:", true,
+                              REGULAR);
+    drawQRCode(renderer, (480 - 6 * 33) / 2, startY + LINE_SPACING * 7, hostnameUrl);
   } else {
     // STA mode display (original behavior)
     const int startY = 65;
@@ -385,6 +422,11 @@ void CrossPointWebServerActivity::renderServerRunning() const {
     renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 3, hostnameUrl.c_str(), true, REGULAR);
 
     renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 4, "Open this URL in your browser", true, REGULAR);
+
+    // Show QR code for URL
+    drawQRCode(renderer, (480 - 6 * 33) / 2, startY + LINE_SPACING * 6, webInfo);
+    renderer.drawCenteredText(SMALL_FONT_ID, startY + LINE_SPACING * 5, "or scan QR code with your phone:", true,
+                              REGULAR);
   }
 
   renderer.drawButtonHints(UI_FONT_ID, "« Exit", "", "", "");

src/activities/network/WifiSelectionActivity.cpp

@@ -150,6 +150,11 @@ void WifiSelectionActivity::processWifiScanResults() {
   std::sort(networks.begin(), networks.end(),
             [](const WifiNetworkInfo& a, const WifiNetworkInfo& b) { return a.rssi > b.rssi; });
 
+  // Show networks with PW first
+  std::sort(networks.begin(), networks.end(), [](const WifiNetworkInfo& a, const WifiNetworkInfo& b) {
+    return a.hasSavedPassword && !b.hasSavedPassword;
+  });
+
   WiFi.scanDelete();
   state = WifiSelectionState::NETWORK_LIST;
   selectedNetworkIndex = 0;
@@ -581,7 +586,7 @@ void WifiSelectionActivity::renderConnecting() const {
   if (state == WifiSelectionState::SCANNING) {
     renderer.drawCenteredText(UI_FONT_ID, top, "Scanning...", true, REGULAR);
   } else {
-    renderer.drawCenteredText(READER_FONT_ID, top - 30, "Connecting...", true, BOLD);
+    renderer.drawCenteredText(READER_FONT_ID, top - 40, "Connecting...", true, BOLD);
 
     std::string ssidInfo = "to " + selectedSSID;
     if (ssidInfo.length() > 25) {