// Enter your WiFi ssid and password
const char* ssid = "*******"; //your network SSID
const char* password = "*******"; //your network password
String myLineNotifyToken = "*****************"; //Line Notify Token，You can refer this post to get Line token：https://t.ly/LZwKn
int trigPin = 15; //請將 Trig 接 GPIO15
int echoPin = 14; //Echo Pin 接 GPIO14
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include "esp_camera.h"
#define CAMERA_MODEL_AI_THINKER
#define PWDN_GPIO_NUM 32
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 0
#define SIOD_GPIO_NUM 26
#define SIOC_GPIO_NUM 27
#define Y9_GPIO_NUM 35
#define Y8_GPIO_NUM 34
#define Y7_GPIO_NUM 39
#define Y6_GPIO_NUM 36
#define Y5_GPIO_NUM 21
#define Y4_GPIO_NUM 19
#define Y3_GPIO_NUM 18
#define Y2_GPIO_NUM 5
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
String sendImage2LineNotify(String msg) {
 camera_fb_t * fb = NULL;
 fb = esp_camera_fb_get();//取得相機影像放置 fb
 if (!fb) {
 delay(100);
 Serial.println("Camera capture failed, Reset");
 ESP.restart();
 }
 WiFiClientSecure client_tcp;//啟動 SSL wificlient
 Serial.println("Connect to notify-api.line.me");
 if (client_tcp.connect("notify-api.line.me", 443)) {
  Serial.println("Connection successful");
 String head = "--Taiwan\r\nContent-Disposition: form-data;name=\"message\"; \r\n\r\n" + msg + "\r\n--Taiwan\r\nContent-Disposition: form-data; name=\"imageFile\"; filename=\"esp32-cam.jpg\"\r\nContent-Type: image/jpeg\r\n\r\n";
 String tail = "\r\n--Taiwan--\r\n";
 uint16_t imageLen = fb->len;
 uint16_t extraLen = head.length() + tail.length();
 uint16_t totalLen = imageLen + extraLen;
 //開始 POST 傳送訊息
 client_tcp.println("POST /api/notify HTTP/1.1");
 client_tcp.println("Connection: close");
 client_tcp.println("Host: notify-api.line.me");
 client_tcp.println("Authorization: Bearer " + myLineNotifyToken);
 client_tcp.println("Content-Length: " + String(totalLen));
 client_tcp.println("Content-Type: multipart/form-data; boundary=Taiwan");
 client_tcp.println();
 client_tcp.print(head);
 uint8_t *fbBuf = fb->buf;
 size_t fbLen = fb->len;
 Serial.println("Data Sending....");
 //檔案太大，分段傳送
 for (size_t n = 0; n < fbLen; n = n + 2048) {
 if (n + 2048 < fbLen) {
 client_tcp.write(fbBuf, 2048);
 fbBuf += 2048;
 } else if (fbLen % 2048 > 0) {
 size_t remainder = fbLen % 2048;
 client_tcp.write(fbBuf, remainder);
 }
 }
 client_tcp.print(tail);
 client_tcp.println();
 String getResponse = "", Feedback = "";
 boolean state = false;
 int waitTime = 3000; // 最多等 3 秒
 long startTime = millis();
 delay(1000);
 Serial.print("Get Response");
 while ((startTime + waitTime) > millis()) {
 Serial.print(".");
 delay(100);
 bool jobdone=false;
 while (client_tcp.available())//當有收到回覆資料時
 {
 jobdone=true;
 char c = client_tcp.read();
 if (c == '\n')
 {
 if (getResponse.length() == 0) state = true;
 getResponse = "";
 }
 else if (c != '\r')
 getResponse += String(c);
 if (state == true) Feedback += String(c);
 startTime = millis();
 }
 if (jobdone) break;
 }
 client_tcp.stop();
 esp_camera_fb_return(fb);//清除緩衝區
 return Feedback;
 }
 else {
 esp_camera_fb_return(fb);
 return "Send failed.";
 }
}
void setup() {
 Serial.begin(115200);
 //初始化相機結束
 camera_config_t config;
 config.ledc_channel = LEDC_CHANNEL_0;
 config.ledc_timer = LEDC_TIMER_0;
 config.pin_d0 = Y2_GPIO_NUM;
 config.pin_d1 = Y3_GPIO_NUM;
 config.pin_d2 = Y4_GPIO_NUM;
 config.pin_d3 = Y5_GPIO_NUM;
 config.pin_d4 = Y6_GPIO_NUM;
 config.pin_d5 = Y7_GPIO_NUM;
 config.pin_d6 = Y8_GPIO_NUM;
 config.pin_d7 = Y9_GPIO_NUM;
 config.pin_xclk = XCLK_GPIO_NUM;
 config.pin_pclk = PCLK_GPIO_NUM;
 config.pin_vsync = VSYNC_GPIO_NUM;
 config.pin_href = HREF_GPIO_NUM;
 config.pin_sscb_sda = SIOD_GPIO_NUM;
 config.pin_sscb_scl = SIOC_GPIO_NUM;
 config.pin_pwdn = PWDN_GPIO_NUM;
 config.pin_reset = RESET_GPIO_NUM;
 config.xclk_freq_hz = 20000000;
 config.pixel_format = PIXFORMAT_JPEG;
 config.jpeg_quality = 10; //10-63 lower number means higher quality
 config.fb_count = 2;
 config.frame_size = FRAMESIZE_XGA;// FRAMESIZE_ + UXGA|SXGA|XGA|SVGA|VGA|CIF|QVGA|HQVGA|QQVGA
 //Line notify don't accept bigger than XGA
 esp_err_t err = esp_camera_init(&config);
 if (err != ESP_OK) {
 Serial.printf("Camera init failed with error 0x%x", err);
 delay(1000);
 ESP.restart();
 }
 //初始化相機結束，開始網路連線
 WiFi.mode(WIFI_STA);
 Serial.println("");
 Serial.print("Connecting to ");
 Serial.println(ssid);
 WiFi.begin(ssid, password);
 long int StartTime = millis();
 while (WiFi.status() != WL_CONNECTED) {
 delay(500);
 if ((StartTime + 10000) < millis()) break;
 }
 Serial.println("");
 Serial.println("IP address: ");
 Serial.println(WiFi.localIP());
 Serial.println("");
 if (WiFi.status() != WL_CONNECTED) {
 Serial.println("Reset");
 delay(1000);
 ESP.restart();//連線不成功，則重新開機
 }
 pinMode(trigPin, OUTPUT); //Define inputs and outputs
 pinMode(echoPin, INPUT);

 }
void loop() {
 digitalWrite(trigPin, LOW);
 delayMicroseconds(5);
 digitalWrite(trigPin, HIGH); // 給 Trig 高電位，持續 10 微秒
 delayMicroseconds(10);
 digitalWrite(trigPin, LOW);
 long cm = pulseIn(echoPin, HIGH); // 收到高電位時的時間
 cm = (cm / 2) / 29.1; // 將時間換算成距離 cm 或 inch
 Serial.println(cm);
 if (cm <= 30) {
 Serial.println("starting to Line");
 String payload = sendImage2LineNotify("There is someone coming...."); //訊息
 Serial.println(payload);
 delay(2000);
 }
 delay(1000); //You could only send up to 50 images to Line Notify in one hour.
}