Add a WiFi-without-LWIP example

README.md

@@ -218,6 +218,7 @@ App|Description
 [picow_http_client_verify](pico_w/wifi/http_client) | Demonstrates how to make a https request with server authentication.
 [picow_mqtt_client](pico_w/wifi/mqtt) | Demonstrates how to implement a MQTT client application.
 [picow_ota_update](pico_w/wifi/ota_update) | A minimal OTA update server (RP235x only). See the separate [README](pico_w/wifi/ota_update/README.md) for more details.
+[picow_router_solicit](pico_w/wifi/router_solicit) | Demonstrates how to use WiFi without LwIP by sending an IPv6 router solicitation.
 
 #### FreeRTOS Networking
 

pico_w/wifi/CMakeLists.txt

@@ -20,6 +20,7 @@ else()
     add_subdirectory_exclude_platforms(udp_beacon)
     add_subdirectory_exclude_platforms(http_client)
     add_subdirectory_exclude_platforms(mqtt)
+    add_subdirectory_exclude_platforms(router_solicit)
 
     if (NOT TARGET pico_mbedtls)
         message("Skipping tls_client and ota_update examples as Mbed TLS is not available")

pico_w/wifi/router_solicit/CMakeLists.txt

@@ -0,0 +1,12 @@
+add_executable(picow_router_solicit
+    router_solicit.c
+)
+target_link_libraries(picow_router_solicit
+    pico_stdlib
+    pico_cyw43_arch_none
+)
+target_compile_definitions(picow_router_solicit PRIVATE
+    WIFI_SSID=\"${WIFI_SSID}\"
+    WIFI_PASSWORD=\"${WIFI_PASSWORD}\"
+)
+pico_add_extra_outputs(picow_router_solicit)