Hi. I need some help please. I have been running the IP Camera sketch for a while without any problems but I am now receiving this error message: “Guru Meditation Error: Core 0 panic’ed (Unhandled debug exception). Debug exception reason: Stack canary watchpoint triggered (cam_task)” in the output monitor and crashes before the error code is reached. I understsnd it is the memory that is over running.
This is the block of code that causes the problem:
// Camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf(“Camera init failed with error 0x%x”, err);
return;
}
and this is the statement that crashes: “if (err != ESP_OK)”. I have played around with the camera settings and scoured the internet for a solution but nothing works. Occasionally I am able to connect to Wi-Fi but not very often. The CameraWebserver sketch works okay. Any ideas please? Thank you in advance.
I am using a Esp32S-cam AI Thinker module
Arduino IDE 2.3.6
Esp32-cam MD programmer
The code: 
/*********
Rui Santos & Sara Santos – Random Nerd Tutorials
Complete instructions at https://RandomNerdTutorials.com/esp32-cam-projects-ebook/
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files.
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

*/
#include “esp_camera.h”
#include <WiFi.h>
#include “esp_timer.h”
#include “img_converters.h”
#include “Arduino.h”
#include “fb_gfx.h”
#include “soc/soc.h” //disable brownout problems
#include “soc/rtc_cntl_reg.h” //disable brownout problems
#include “esp_http_server.h”
// Replace with your network credentials
const char *ssid = “************”;
const char *password = “***************”;
// Set your Static IP address
IPAddress local_IP(*************); //Esp32-Cam2
// Set your Gateway IP address
IPAddress gateway(*********************);
IPAddress subnet(255, 255, 0, 0);
IPAddress primaryDNS(8, 8, 8, 8); //optional
IPAddress secondaryDNS(8, 8, 4, 4); //optional
 
#define PART_BOUNDARY “123456789000000000000987654321”
#define CAMERA_MODEL_AI_THINKER
//#define CAMERA_MODEL_M5STACK_PSRAM
//#define CAMERA_MODEL_M5STACK_WITHOUT_PSRAM
//#define CAMERA_MODEL_WROVER_KIT
#if defined(CAMERA_MODEL_WROVER_KIT)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM -1
#define XCLK_GPIO_NUM 21
#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 19
#define Y4_GPIO_NUM 18
#define Y3_GPIO_NUM 5
#define Y2_GPIO_NUM 4
#define VSYNC_GPIO_NUM 25
#define HREF_GPIO_NUM 23
#define PCLK_GPIO_NUM 22
#elif defined(CAMERA_MODEL_M5STACK_PSRAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23

#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 32
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(CAMERA_MODEL_M5STACK_WITHOUT_PSRAM)
#define PWDN_GPIO_NUM -1
#define RESET_GPIO_NUM 15
#define XCLK_GPIO_NUM 27
#define SIOD_GPIO_NUM 25
#define SIOC_GPIO_NUM 23

#define Y9_GPIO_NUM 19
#define Y8_GPIO_NUM 36
#define Y7_GPIO_NUM 18
#define Y6_GPIO_NUM 39
#define Y5_GPIO_NUM 5
#define Y4_GPIO_NUM 34
#define Y3_GPIO_NUM 35
#define Y2_GPIO_NUM 17
#define VSYNC_GPIO_NUM 22
#define HREF_GPIO_NUM 26
#define PCLK_GPIO_NUM 21
#elif defined(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
#else
#error “Camera model not selected”
#endif
static const char* _STREAM_CONTENT_TYPE = “multipart/x-mixed-replace;boundary=” PART_BOUNDARY;
static const char* _STREAM_BOUNDARY = “\r\n–” PART_BOUNDARY “\r\n”;
static const char* _STREAM_PART = “Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n”;
httpd_handle_t stream_httpd = NULL;
static esp_err_t stream_handler(httpd_req_t *req){
camera_fb_t * fb = NULL;
esp_err_t res = ESP_OK;
size_t _jpg_buf_len = 0;
uint8_t * _jpg_buf = NULL;
char * part_buf[64];
res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
if(res != ESP_OK){
return res;
}
while(true){
fb = esp_camera_fb_get();
if (!fb) {
Serial.println(“Camera capture failed”);
res = ESP_FAIL;
} else {
if(fb->width > 400){
if(fb->format != PIXFORMAT_JPEG){
bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);
esp_camera_fb_return(fb);
fb = NULL;
if(!jpeg_converted){
Serial.println(“JPEG compression failed”);
res = ESP_FAIL;
}
} else {
_jpg_buf_len = fb->len;
_jpg_buf = fb->buf;
}
}
}
if(res == ESP_OK){
size_t hlen = snprintf((char *)part_buf, 64, _STREAM_PART, _jpg_buf_len);
res = httpd_resp_send_chunk(req, (const char *)part_buf, hlen);
}
if(res == ESP_OK){
res = httpd_resp_send_chunk(req, (const char *)_jpg_buf, _jpg_buf_len);
}
if(res == ESP_OK){
res = httpd_resp_send_chunk(req, _STREAM_BOUNDARY, strlen(_STREAM_BOUNDARY));
}
if(fb){
esp_camera_fb_return(fb);
fb = NULL;
_jpg_buf = NULL;
} else if(_jpg_buf){
free(_jpg_buf);
_jpg_buf = NULL;
}
if(res != ESP_OK){
break;
}
//Serial.printf(“MJPG: %uB\n”,(uint32_t)(_jpg_buf_len));
}
return res;
}
void startCameraServer(){
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
config.server_port = 80;
httpd_uri_t index_uri = {
.uri = “/”,
.method = HTTP_GET,
.handler = stream_handler,
.user_ctx = NULL
};

//Serial.printf(“Starting web server on port: ‘%d’\n”, config.server_port);
if (httpd_start(&stream_httpd, &config) == ESP_OK) {
httpd_register_uri_handler(stream_httpd, &index_uri);
}
}
void setup() {
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG, 0); //disable brownout detector
Serial.println(WiFi.macAddress()); //Prints the Esp32’s MAC address

Serial.begin(115200);
Serial.setDebugOutput(false);

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_sccb_sda = SIOD_GPIO_NUM;
config.pin_sccb_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;

if(psramFound()){
config.frame_size = FRAMESIZE_UXGA;
config.jpeg_quality = 10;
config.fb_count = 2;
} else {
config.frame_size = FRAMESIZE_SVGA;
config.jpeg_quality = 12;
config.fb_count = 1;
}

// Camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK) {
Serial.printf(“Camera init failed with error 0x%x”, err);
return;
}
if(!WiFi.config(local_IP, gateway, subnet, primaryDNS, secondaryDNS)) {
Serial.println(“STA Failed to configure”);
}
// Wi-Fi connection
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(“.”);
}
Serial.println(“”);
Serial.println(“WiFi connected”);

Serial.print(“Camera Stream Ready! Go to: http://&#8221;);
Serial.print(WiFi.localIP());

// Start streaming web server
startCameraServer();
} //End of setup
void loop() {
delay(1);
}
The output:
16:27:53.523 -> configsip: 0, SPIWP:0xee
16:27:53.523 -> clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
16:27:53.559 -> mode:DIO, clock div:1
16:27:53.559 -> load:0x3fff0030,len:4980
16:27:53.559 -> load:0x40078000,len:16612
16:27:53.559 -> load:0x40080400,len:3480
16:27:53.559 -> entry 0x400805b4
16:27:54.780 -> Guru Meditation Error: Core 0 panic’ed (Unhandled debug exception).
16:27:54.814 -> A14 : 0x3ffb2ab0 A15 : 0xff000000 SAR : 0x00000004 EXCCAUSE: 0x00000001
16:27:54.814 -> EXCVADDR: 0x00000000 LBEG : 0x4008aaf1 LEND : 0x4008ab01 LCOUNT : 0xfffffffe
16:27:54.847 ->
16:27:54.847 ->
16:27:54.847 -> Backtrace: 0x4008e317:0x3ffb2550 0x40092629:0x3ffb2580 0x4009265e:0x3ffb25a0 0x400927d4:0x3ffb25c0 0x400830df:0x3ffb25e0 0x400830f9:0x3ffb2610 0x40082d75:0x3ffb2630 0x4008e804:0x3ffb2650 0x4008d895:0x3ffb2670 0x4008db0c:0x3ffb2690 0x4008375e:0x3ffb26b0 0x400837a6:0x3ffb26d0 0x40083909:0x3ffb2700 0x400e17bd:0x3ffb2720 0x400e5d89:0x3ffb2750 0x4000bd83:0x3ffb2770 0x4000182a:0x3ffb2790 0x400e5431:0x3ffb27b0 0x400e5d89:0x3ffb27d0 0x4008a7aa:0x3ffb27f0 0x40089c4d:0x3ffb2810 0x40089c9e:0x3ffb2830 0x4008a19d:0x3ffb2850 0x40173a07:0x3ffb2880 0x4017341e:0x3ffb28a0 0x4016a145:0x3ffb2bc0 0x400938a9:0x3ffb2bf0 0x40117079:0x3ffb2c50 0x4008e1f5:0x3ffb2ca0
16:27:54.880 ->
16:27:54.880 ->
16:27:54.880 ->
16:27:54.880 ->
16:27:54.880 -> ELF file SHA256: aba5fd24b
16:27:54.880 ->
16:27:55.243 -> Rebooting…