236 lines
7.2 KiB
C++
236 lines
7.2 KiB
C++
#include "esp_camera.h"
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#include <WiFi.h>
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/* This sketch is a extension/expansion/reork of the 'official' ESP32 Camera example
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* sketch from Expressif:
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* https://github.com/espressif/arduino-esp32/tree/master/libraries/ESP32/examples/Camera/CameraWebServer
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*
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* It is modified to allow control of Illumination LED Lamps's (present on some modules),
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* greater feedback via a status LED, and the HTML contents are present in plain text
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* for easy modification.
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*
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* A camera name can now be configured, and wifi details can be stored in an optional
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* header file to allow easier updated of the repo.
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*
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* The web UI has had minor changes to add the lamp control when present, I have made the
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* 'Start Stream' controls more accessible, and add feedback of the camera name/firmware.
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*
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*
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* note: Make sure that you have either selected ESP32 AI Thinker,
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* or another board which has PSRAM enabled to use high resolution camera modes
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*/
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// Select camera board model
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//#define CAMERA_MODEL_WROVER_KIT
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//#define CAMERA_MODEL_ESP_EYE
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//#define CAMERA_MODEL_M5STACK_PSRAM
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//#define CAMERA_MODEL_M5STACK_WIDE
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//#define CAMERA_MODEL_M5STACK_NO_PSRAM
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#define CAMERA_MODEL_AI_THINKER
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// Select camera module used on the board
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#define CAMERA_MODULE_OV2640
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//#define CAMERA_MODULE_OV3660
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#if __has_include("myconfig.h")
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// I keep my settings in a seperate header file
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#include "myconfig.h"
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#else
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// Default Setup; an accesspoint
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// SSID and Password for the accesspoint we want to join, or create
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char* ssid = "ESP32-CAM-CONNECT";
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const char* password = "InsecurePassword";
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// Accesspoint mode: comment out to join an existing network
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#define WIFI_AP
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// Optional fixed channel for accesspoint
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// #define AP_CHAN 5
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#endif
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// A Name for the Camera. (can be set in myconfig.h)
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#ifdef CAM_NAME
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char myName[] = CAM_NAME;
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#else
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char myName[] = "ESP32 camera server";
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#endif
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// This will be displayed to identify the firmware
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char myVer[] PROGMEM = __DATE__ " @ " __TIME__;
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// current rotation direction
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char myRotation[5];
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#include "camera_pins.h"
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// Status and illumination LED's
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#ifdef LAMP_PIN
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int lampVal = 0; // Current Lamp value, range 0-100, Start off
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#else
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int lampVal = -1; // disable Lamp
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#endif
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int lampChannel = 7; // a free PWM channel (some channels used by camera)
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const int pwmfreq = 50000; // 50K pwm frequency
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const int pwmresolution = 9; // duty cycle bit range
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// https://diarmuid.ie/blog/pwm-exponential-led-fading-on-arduino-or-other-platforms
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const int pwmIntervals = 100; // The number of Steps between the output being on and off
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float lampR; // The R value in the PWM graph equation (calculated in setup)
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void startCameraServer();
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void setup() {
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Serial.begin(115200);
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Serial.setDebugOutput(true);
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Serial.println();
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Serial.println("====");
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Serial.print("esp32-cam-webserver: ");
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Serial.println(myName);
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Serial.print("Code Built: ");
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Serial.println(myVer);
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// initial rotation
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// can be set in myconfig.h
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#ifndef CAM_ROTATION
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#define CAM_ROTATION 0
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#endif
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// set the initialisation for image rotation
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int n = snprintf(myRotation,sizeof(myRotation),"%d",CAM_ROTATION);
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#ifdef LED_PIN // If we have a notification LED set it to output
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pinMode(LED_PIN, OUTPUT);
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digitalWrite(LED_PIN, LED_OFF);
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#endif
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#ifdef LAMP_PIN
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ledcSetup(lampChannel, pwmfreq, pwmresolution); // configure LED PWM channel
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ledcWrite(lampChannel, lampVal); // set initial value
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ledcAttachPin(LAMP_PIN, lampChannel); // attach the GPIO pin to the channel
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// Calculate the PWM scaling R factor:
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// https://diarmuid.ie/blog/pwm-exponential-led-fading-on-arduino-or-other-platforms
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lampR = (pwmIntervals * log10(2))/(log10(pow(2,pwmresolution)));
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#endif
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camera_config_t config;
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config.ledc_channel = LEDC_CHANNEL_0;
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config.ledc_timer = LEDC_TIMER_0;
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config.pin_d0 = Y2_GPIO_NUM;
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config.pin_d1 = Y3_GPIO_NUM;
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config.pin_d2 = Y4_GPIO_NUM;
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config.pin_d3 = Y5_GPIO_NUM;
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config.pin_d4 = Y6_GPIO_NUM;
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config.pin_d5 = Y7_GPIO_NUM;
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config.pin_d6 = Y8_GPIO_NUM;
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config.pin_d7 = Y9_GPIO_NUM;
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config.pin_xclk = XCLK_GPIO_NUM;
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config.pin_pclk = PCLK_GPIO_NUM;
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config.pin_vsync = VSYNC_GPIO_NUM;
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config.pin_href = HREF_GPIO_NUM;
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config.pin_sscb_sda = SIOD_GPIO_NUM;
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config.pin_sscb_scl = SIOC_GPIO_NUM;
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config.pin_pwdn = PWDN_GPIO_NUM;
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config.pin_reset = RESET_GPIO_NUM;
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config.xclk_freq_hz = 20000000;
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config.pixel_format = PIXFORMAT_JPEG;
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//init with high specs to pre-allocate larger buffers
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if(psramFound()){
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config.frame_size = FRAMESIZE_UXGA;
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config.jpeg_quality = 10;
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config.fb_count = 2;
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} else {
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config.frame_size = FRAMESIZE_SVGA;
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config.jpeg_quality = 12;
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config.fb_count = 1;
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}
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#if defined(CAMERA_MODEL_ESP_EYE)
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pinMode(13, INPUT_PULLUP);
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pinMode(14, INPUT_PULLUP);
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#endif
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// camera init
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esp_err_t err = esp_camera_init(&config);
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if (err != ESP_OK) {
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Serial.printf("Camera init failed with error 0x%x", err);
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return;
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}
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sensor_t * s = esp_camera_sensor_get();
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//initial sensors are flipped vertically and colors are a bit saturated
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if (s->id.PID == OV3660_PID) {
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s->set_vflip(s, 1);//flip it back
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s->set_brightness(s, 1);//up the blightness just a bit
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s->set_saturation(s, -2);//lower the saturation
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}
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//drop down frame size for higher initial frame rate
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s->set_framesize(s, FRAMESIZE_SVGA);
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#if defined(CAMERA_MODEL_M5STACK_WIDE)
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s->set_vflip(s, 1);
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s->set_hmirror(s, 1);
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#endif
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// Feedback that hardware init is complete and we are now attempting to connect
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Serial.println("");
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Serial.print("Connecting to Wifi Netowrk: ");
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Serial.println(ssid);
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flashLED(400);
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delay(100);
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#ifdef WIFI_AP
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Serial.println("Setting up AP");
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#ifdef AP_CHAN
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WiFi.softAP(ssid, password, AP_CHAN);
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# else
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WiFi.softAP(ssid, password);
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#endif
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#else
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(250); // Wait for Wifi to connect. If this fails wifi the code basically hangs here.
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// - It would be good to do something else here as a future enhancement.
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// (eg: go to a captive AP config portal to configure the wifi)
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}
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#endif
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// feedback that we are connected
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Serial.println("WiFi connected");
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Serial.println("");
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flashLED(200);
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delay(100);
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flashLED(200);
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delay(100);
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flashLED(200);
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// Start the Stream server, and the handler processes for the Web UI.
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startCameraServer();
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Serial.print("Camera Ready! Use 'http://");
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#ifdef WIFI_AP
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Serial.print(WiFi.softAPIP());
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#else
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Serial.print(WiFi.localIP());
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#endif
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Serial.println("' to connect");
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}
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// Notification LED
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void flashLED(int flashtime)
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{
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#ifdef LED_PIN // If we have it; flash it.
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digitalWrite(LED_PIN, LED_ON); // On at full power.
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delay(flashtime); // delay
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digitalWrite(LED_PIN, LED_OFF); // turn Off
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#else
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return; // No notifcation LED, do nothing, no delay
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#endif
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}
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void loop() {
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// Just loop forever.
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// The stream and URI handler processes initiated by the startCameraServer() call at the
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// end of setup() will handle the camera and UI processing from now on.
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delay(10000);
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}
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