added basic FPV example with XIAO board

examples/xiao-fpv-sender/xiao-fpv-sender.cpp

@@ -0,0 +1,65 @@
+/**************************************************
+ * ESPNowCam video Transmitter.
+ * ----------------------------
+ * 
+ * XIAO FPV ESPNow transmitter uses some extra features of
+ * this board to have some power consumption improvements 
+ *
+ * by @hpsaturn Copyright (C) 2024
+ * This file is part ESP32S3 camera tests project:
+ * https://github.com/hpsaturn/esp32s3-cam
+**************************************************/
+
+#include <Arduino.h>
+#include <OneButton.h>
+#include <ESPNowCam.h>
+#include <drivers/CamXiao.h>
+#include <Utils.h>
+
+CamXiao Camera;
+ESPNowCam radio;
+OneButton button1(GPIO_NUM_0, true);
+
+void processFrame() {
+  if (Camera.get()) {
+    uint8_t *out_jpg = NULL;
+    size_t out_jpg_len = 0;
+    frame2jpg(Camera.fb, 12, &out_jpg, &out_jpg_len);
+    radio.sendData(out_jpg, out_jpg_len);
+    printFPS("CAM:");
+    free(out_jpg);
+    Camera.free();
+  }
+}
+
+void shutdown() {
+  Serial.println("shutdown..");
+  esp_sleep_enable_ext0_wakeup(GPIO_NUM_0,0);
+  delay(1000);
+  esp_deep_sleep_start();
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  delay(1000); // only for debugging 
+
+  if(psramFound()){
+    size_t psram_size = esp_spiram_get_size() / 1048576;
+    Serial.printf("PSRAM size: %dMb\r\n", psram_size);
+  }
+
+  radio.init();
+  if (!Camera.begin()) {
+    Serial.println("Camera Init Fail");
+    delay(1000);
+  }
+
+  button1.attachClick([]() { shutdown(); });
+  delay(100);
+}
+
+void loop() {
+  processFrame();
+  button1.tick();
+}

platformio.ini

@@ -29,16 +29,26 @@ board = esp32-s3-devkitc-1
 board_build.flash_size = 16MB
 board_build.partitions = ./config/partitions.csv
 
-[env:xiao-espnow-sender]
+[xiao-common]
 extends = esp32common
 board_build.arduino.memory_type = dio_opi ;
 board_build.flash_size = 8MB
-build_src_filter = -<*> -<*common*> +<xiao-espnow-sender/>
 build_flags =
   ${env.build_flags}
   -DARDUINO_USB_CDC_ON_BOOT=1
   -DARDUINO_USB_MODE=1
 
+[env:xiao-espnow-sender]
+extends = xiao-common
+build_src_filter = -<*> -<*common*> +<xiao-espnow-sender/>
+
+[env:xiao-fpv-sender]
+extends = xiao-common
+build_src_filter = -<*> -<*common*> +<xiao-fpv-sender/>
+lib_deps = 
+  ${esp32common.lib_deps}
+  mathertel/OneButton@^2.0.3
+
 [env:freenove-tank]
 extends = esp32common
 board_build.arduino.memory_type = dio_opi ;