doc: add hint for feature flag in wifi examples (#2365)

examples/src/bin/wifi_80211_tx.rs

@@ -1,6 +1,7 @@
 //! WiFi frame injection example
 //!
 //! Periodically transmits a beacon frame.
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils esp-wifi/sniffer
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_access_point.rs

@@ -6,6 +6,7 @@
 //! Open http://192.168.2.1:8080/ in your browser
 //!
 //! On Android you might need to choose _Keep Accesspoint_ when it tells you the WiFi has no internet connection, Chrome might not want to load the URL - you can use a shell and try `curl` and `ping`
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_access_point_with_sta.rs

@@ -7,6 +7,7 @@
 //! Open http://192.168.2.1:8080/ in your browser - the example will perform an HTTP get request to some "random" server
 //!
 //! On Android you might need to choose _Keep Accesspoint_ when it tells you the WiFi has no internet connection, Chrome might not want to load the URL - you can use a shell and try `curl` and `ping`
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_bench.rs

@@ -6,6 +6,7 @@
 //! cargo run --release
 //! ```
 //! Ensure you have set the IP of your local machine in the `HOST_IP` env variable. E.g `HOST_IP="192.168.0.24"` and also set SSID and PASSWORD env variable before running this example.
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_coex.rs

@@ -6,6 +6,7 @@
 //! - does BLE advertising (you cannot connect to it - it's just not implemented in the example)
 //!
 //! Note: On ESP32-C2 and ESP32-C3 you need a wifi-heap size of 70000, on ESP32-C6 you need 80000 and a tx_queue_size of 10
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils esp-wifi/ble esp-wifi/coex
 //% CHIPS: esp32 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_dhcp.rs

@@ -4,6 +4,7 @@
 //! Set SSID and PASSWORD env variable before running this example.
 //!
 //! This gets an ip address via DHCP then performs an HTTP get request to some "random" server
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_embassy_access_point.rs

@@ -7,6 +7,7 @@
 //! On Android you might need to choose _Keep Accesspoint_ when it tells you the WiFi has no internet connection, Chrome might not want to load the URL - you can use a shell and try `curl` and `ping`
 //!
 //! Because of the huge task-arena size configured this won't work on ESP32-S2
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: embassy embassy-generic-timers esp-wifi esp-wifi/async esp-wifi/embassy-net esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_embassy_access_point_with_sta.rs

@@ -10,6 +10,7 @@
 //! On Android you might need to choose _Keep Accesspoint_ when it tells you the WiFi has no internet connection, Chrome might not want to load the URL - you can use a shell and try `curl` and `ping`
 //!
 //! Because of the huge task-arena size configured this won't work on ESP32-S2
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: embassy embassy-generic-timers esp-wifi esp-wifi/async esp-wifi/embassy-net esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_embassy_bench.rs

@@ -8,7 +8,7 @@
 //! Ensure you have set the IP of your local machine in the `HOST_IP` env variable. E.g `HOST_IP="192.168.0.24"` and also set SSID and PASSWORD env variable before running this example.
 //!
 //! Because of the huge task-arena size configured this won't work on ESP32-S2 and ESP32-C2
-//!
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: embassy embassy-generic-timers esp-wifi esp-wifi/async esp-wifi/embassy-net esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c3 esp32c6

examples/src/bin/wifi_embassy_dhcp.rs

@@ -6,6 +6,7 @@
 //! This gets an ip address via DHCP then performs an HTTP get request to some "random" server
 //!
 //! Because of the huge task-arena size configured this won't work on ESP32-S2
+//! When using USB-SERIAL-JTAG you have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: embassy embassy-generic-timers esp-wifi esp-wifi/async esp-wifi/embassy-net esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_sniffer.rs

@@ -1,6 +1,7 @@
 //! WiFi sniffer example
 //!
 //! Sniffs for beacon frames.
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils esp-wifi/sniffer
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6

examples/src/bin/wifi_static_ip.rs

@@ -5,6 +5,7 @@
 //! - might be necessary to configure your WiFi access point accordingly
 //! - uses the given static IP
 //! - responds with some HTML content when connecting to port 8080
+//! When using USB-SERIAL-JTAG you may have to activate the feature `phy-enable-usb` in the esp-wifi crate.
 
 //% FEATURES: esp-wifi esp-wifi/wifi-default esp-wifi/wifi esp-wifi/utils
 //% CHIPS: esp32 esp32s2 esp32s3 esp32c2 esp32c3 esp32c6