add image to readme and only print password length

Author: finger563

components/wifi/example/README.md

@@ -36,3 +36,7 @@ idf.py -p PORT flash monitor
 (To exit the serial monitor, type ``Ctrl-]``.)
 
 See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
+
+### Example Output
+
+<img width="1885" height="4148" alt="CleanShot 2025-10-25 at 23 48 55" src="https://github.com/user-attachments/assets/86b791b6-6dd4-4c4a-985c-7050413c8680" />

components/wifi/include/wifi_ap.hpp

@@ -441,11 +441,12 @@ namespace fmt {
 template <> struct formatter<espp::WifiAp::Config> : fmt::formatter<std::string> {
   template <typename FormatContext>
   auto format(const espp::WifiAp::Config &config, FormatContext &ctx) const {
-    return fmt::format_to(ctx.out(),
-                          "WifiAp::Config {{ ssid: '{}', password: '{}', phy_rate: {}, channel: "
-                          "{}, max_number_of_stations: {} }}",
-                          config.ssid, config.password, config.phy_rate, config.channel,
-                          config.max_number_of_stations);
+    return fmt::format_to(
+        ctx.out(),
+        "WifiAp::Config {{ ssid: '{}', password length: {}, phy_rate: {}, channel: "
+        "{}, max_number_of_stations: {} }}",
+        config.ssid, config.password.size(), config.phy_rate, config.channel,
+        config.max_number_of_stations);
   }
 };
 } // namespace fmt

components/wifi/include/wifi_sta.hpp

@@ -632,11 +632,12 @@ template <> struct formatter<espp::WifiSta::Config> : fmt::formatter<std::string
   auto format(const espp::WifiSta::Config &config, FormatContext &ctx) const {
     return fmt::format_to(
         ctx.out(),
-        "WifiSta::Config {{ ssid: '{}', password: '{}', phy_rate: {}, num_connect_retries: {}, "
+        "WifiSta::Config {{ ssid: '{}', password length: {}, phy_rate: {}, num_connect_retries: "
+        "{}, "
         "channel: {}, set_ap_mac: {}, ap_mac: {:02x}:{:02x}:{:02x}:{:02x}:{:02x}:{:02x} }}",
-        config.ssid, config.password, config.phy_rate, config.num_connect_retries, config.channel,
-        config.set_ap_mac, config.ap_mac[0], config.ap_mac[1], config.ap_mac[2], config.ap_mac[3],
-        config.ap_mac[4], config.ap_mac[5]);
+        config.ssid, config.password.size(), config.phy_rate, config.num_connect_retries,
+        config.channel, config.set_ap_mac, config.ap_mac[0], config.ap_mac[1], config.ap_mac[2],
+        config.ap_mac[3], config.ap_mac[4], config.ap_mac[5]);
   }
 };