Add Bluetooth examples

Co-authored-by: Peter Harper <77111776+peterharperuk@users.noreply.github.com>

pico_w/bt/standalone/CMakeLists.txt

@@ -0,0 +1,68 @@
+# Standalone example that reads from the on board temperature sensor and sends notifications via BLE
+# Flashes slowly each second to show it's running
+add_executable(picow_ble_temp_sensor
+    server.c server_common.c
+    )
+target_link_libraries(picow_ble_temp_sensor
+    pico_stdlib
+    pico_btstack_ble
+    pico_btstack_cyw43
+    pico_cyw43_arch_none
+    hardware_adc
+    )
+target_include_directories(picow_ble_temp_sensor PRIVATE
+    ${CMAKE_CURRENT_LIST_DIR} # For btstack config
+    )
+pico_btstack_make_gatt_header(picow_ble_temp_sensor PRIVATE "${CMAKE_CURRENT_LIST_DIR}/temp_sensor.gatt")
+
+pico_add_extra_outputs(picow_ble_temp_sensor)
+example_auto_set_url(picow_ble_temp_sensor)
+
+# Standalone example that connects to picow_ble_temp_sensor and reads the temperature 
+# Flahes once quickly each second when it's running but not connected to another device
+# Flashes twice quickly each second when connected to another device and reading it's temperature
+add_executable(picow_ble_temp_reader
+    client.c
+    )
+target_link_libraries(picow_ble_temp_reader
+    pico_stdlib
+    pico_btstack_ble
+    pico_btstack_cyw43
+    pico_cyw43_arch_none
+    hardware_adc
+    )
+target_include_directories(picow_ble_temp_reader PRIVATE
+    ${CMAKE_CURRENT_LIST_DIR} # For btstack config
+    )
+target_compile_definitions(picow_ble_temp_reader PRIVATE
+    RUNNING_AS_CLIENT=1
+)
+
+pico_add_extra_outputs(picow_ble_temp_reader)
+example_auto_set_url(picow_ble_temp_reader)
+
+if (WIFI_SSID AND WIFI_PASSWORD)
+    # Another version of the sensor example, but this time also runs iperf over wifi
+    add_executable(picow_ble_temp_sensor_with_wifi
+        server_with_wifi.c server_common.c
+        )
+    target_link_libraries(picow_ble_temp_sensor_with_wifi
+        pico_stdlib
+        pico_btstack_ble
+        pico_btstack_cyw43
+        pico_cyw43_arch_lwip_threadsafe_background
+        pico_lwip_iperf
+        hardware_adc
+        )
+    target_include_directories(picow_ble_temp_sensor_with_wifi PRIVATE
+        ${CMAKE_CURRENT_LIST_DIR} # For btstack config
+        )
+    target_compile_definitions(picow_ble_temp_sensor_with_wifi PRIVATE
+        WIFI_SSID=\"${WIFI_SSID}\"
+        WIFI_PASSWORD=\"${WIFI_PASSWORD}\"
+        )
+    pico_btstack_make_gatt_header(picow_ble_temp_sensor_with_wifi PRIVATE "${CMAKE_CURRENT_LIST_DIR}/temp_sensor.gatt")
+
+    pico_add_extra_outputs(picow_ble_temp_sensor_with_wifi)
+    example_auto_set_url(picow_ble_temp_sensor_with_wifi)
+endif()