ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (2023)

After releasing some projects with the ESP32-CAM, some readers reported issues when trying to use the ESP32-CAM. This guide is a compilation with the most common errors when using the ESP32-CAM and how to fix them.

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (1)

We’ve released the following projects with the ESP32-CAM:

  • Video Streaming, Face Detection and Face Recognition
  • ESP32 IP CAM – Video Streaming (Home Assistant and Node-RED)
  • Take Photo and Save to MicroSD Card
  • PIR Motion Detector with Photo Capture
  • Take Photo, Save to SPIFFS and Display in Web Server

Note: some of our readers reported errors when trying to follow the ESP32-CAM project with Home Assistant. We’ve modified some lines on the code, so most of the problems related with that project should be fixed.

Please note that we couldn’t reproduce some of the errors on our end. However, we’ve gathered all the information given by our readers to get answers to the most common issues.

If you have a different problem or a different solution to these issues, you can share your tips by writing a comment below.

Most common errors:

  1. Failed to connect to ESP32: Timed out waiting for packet header
  2. Camera init failed with error 0x20001 or similar
  3. Brownout detector or Guru meditation error
  4. Sketch too big error – Wrong partition scheme selected
  5. Board at COMX is not available – COM Port Not Selected
  6. Psram error: GPIO isr service is not installed
  7. Weak Wi-Fi Signal
  8. No IP Address in Arduino IDE Serial Monitor
  9. Can’t open web server
  10. The image lags/shows lots of latency
  11. esp_camera_fb_get(): Failed to get the frame on time!

1. Failed to connect to ESP32: Timed out waiting for packet header

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (2)

This error means that the ESP32-CAM is not in flashing mode or it is not connected properly to the FTDI programmer.

Double-check the steps to upload code

Double-check that you’ve followed the exact steps to put your ESP32-CAM in flashing mode. Failing to complete one of the steps may result in that error. Here’s the steps you need to follow:

Connect the ESP32-CAM board to your computer using an FTDI programmer. Follow the next schematic diagram:

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (3)

Important: GPIO 0 needs to be connected to GND so that you’re able to upload code.

Many FTDI programmers have a jumper that allows you to select 3.3V or 5V. Make sure the jumper is in the right place to select 5V.

Important:GPIO 0needs to be connected toGNDso that you’re able to upload code.

ESP32-CAMFTDI Programmer
GNDGND
5VVCC (5V)
U0RTX
U0TRX
GPIO 0GND

To upload the code, follow the next steps:

1) Go toTools>Boardand selectAI-Thinker ESP32-CAM.

2) Go toTools>Portand select the COM port the ESP32 is connected to.

3) Then, click the upload button to upload the code.

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (4)

4) When you start to see these dots on the debugging window as shown below, press the ESP32-CAM on-board RST button.

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (5)

After a few seconds, the code should be successfully uploaded to your board.

GPIO 0 must be connected to GND

Important: if you can’t upload the code, double-check that GPIO 0 is connected to GND and that you selected the right settings in the Tools menu. You should also press the on-board Reset button to restart your ESP32 in flashing mode. Also, check that you have the FTDI programmer jumper cap set to 5V.

Check the FTDI programmer you are using

One of our readers reported the following: “found out that you can program the board with a USB-to-TTL module model CP2102 and that the CH340 model does NOT work“. This is the FTDI programmer we’re using.

(Video) ESP32-cam

Power the ESP32-CAM with 5V

Some of our readers reported that they could only upload code when the ESP32 was powered with 5V. So, power the ESP32-CAM with 5V.

FTDI Programmer 5V

Measure the output voltage of your FTDI programmer (VCC and GND) using a Multimeter to ensure it’s providing 5V to your ESP32-CAM.

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (6)

2. Camera init failed with error 0x20001 or similar

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (7)

If you get this exact error, it means that your camera OVX is not connected properly to your ESP32 board or you have the wrong pin assignment in the code.

Sometimes, unplugging and plugging the FTDI programmer multiple times or restart the board multiple times, might solve the issue.

Camera not connected properly

The camera has a tiny connector and you must ensure it’s connected in the the right away and with a secure fit, otherwise it will fail to establish a connection.

Wrong pin assignment in the code

When you get this error, it might also mean that you didn’t select the right board in the define section or the pin definition is wrong for your board.

Make sure you select the right camera module in your projects. You just need to uncomment the right camera module and comment all the others:

//#define CAMERA_MODEL_WROVER_KIT//#define CAMERA_MODEL_M5STACK_PSRAM#define CAMERA_MODEL_AI_THINKER

In this example, we’re using the CAMERA_MODEL_AI_THINKER, so it’s the one that is enabled. Otherwise, it will fail the pin assignment and the camera will fail to init.

There are many esp32-cam boards being released (“fake boards”) that the wiring between the ESP32 and the OV camera might be different, so selecting the camera module, might not be enough. You might need to check each gpio declaration with your board pinout.

For example, M5Stack board without PSRAM has a different pin assignment than the M5STACK with PSRAM (defined on the code by default). So, you need to change the pin definition in the code accordingly to the board pinout.

Not enough power through USB source

If you’re powering your ESP32 through a USB port on your computer, it might not be supplying enough power.

Faulty FTDI programmer

Some readers also reported this problem was solved by replacing their actual FTDI programmer with this one.

The camera/connector is broken

If you get this error, it might also mean that your camera or the camera ribbon is broken. If that is the case, you may get a new OV2640 camera probe.

3. Brownout detector or Guru meditation error

When you open your Arduino IDE Serial monitor and the error message “Brownout detector was triggered” is constantly being printed over and over again. It means that there’s some sort of hardware problem.

It’s often related to one of the following issues:

  • Poor quality USB cable;
  • USB cable is too long;
  • Board with some defect (bad solder joints);
  • Bad computer USB port;
  • Or not enough power provided by the computer USB port.

Solution:

  • try a different shorter USB cable (with data wires)
  • use a different computer USB port or use a USB hub with an external power supply
  • some readers reported that when powering the ESP32-CAM with 5V, the issue was fixed.

Also, follow the suggestions described in issue 2.

4. Sketch too big error – Wrong partition scheme selected

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (8)
(Video) 📽️ ESP32 CAM Tutorial - Make a Doll Spy Cam!

When you get the following error:

Sketch too big; see http://www.arduino.cc/en/Guide/Troubleshooting#size for tips on reducing it.Error compiling for board ESP32 Dev Module.

It means that you haven’t selected the right partition scheme. Make sure you select the right partition scheme. In your Arduino IDE, go to Tools > Partition Scheme, select “Huge APP (3MB No OTA)“.

5. Board at COMX is not available – COM Port Not Selected

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (9)

If you get the following error or similar:

serial.serialutil.SerialException: could not open port 'COM8': WindowsError(2, 'The system cannot find the file specified.')Failed to execute script esptoolthe selected serial port Failed to execute script esptool does not exist or your board is not connectedBoard at COM8 is not available

It means that you haven’t selected the COM port in the Tools menu. In your Arduino IDE, go to Tools > Port and select the COM port the ESP32 is connected to.

It might also mean that the ESP32-CAM is not establishing a serial connection with your computer or it is not properly connected to the USB connector.

6. Psram error: GPIO isr service is not installed

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (10)

You are using a board without PSRAM and you get the following error or similar:

E (161) gpio: gpio_isr_handler_remove(380): GPIO isr service is not installed, call gpio_install_isr_service() firstCamera init failed with error 0x101

when the board was initialized with the following settings:

config.frame_size = FRAMESIZE_UXGA;config.jpeg_quality = 10;config.fb_count = 2;

Adding the following fixes the issues (it lowers the image resolution so it won’t need so much space to store images. However, as a result, you cannot get some high resolution formats due to the limited memory):

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;}

Note: face recognition and detection doesn’t work with boards without PSRAM. However, you can still use all the other functionalities of the board. For example, although you can’t use the face recognition and detection features of this project (ESP32-CAM Video Streaming and Face Recognition with Arduino IDE), you can still play with the example and explore the board features as long as you have the right pin assignment in the code.

7. Weak Wi-Fi Signal

Some readers reported that after powering the ESP32-CAM with 5V, they’ve gotten a more stable Wi-Fi signal. You can read this dedicated guide to learn how to connect an external antenna to the ESP32-CAM and extend Wi-Fi coverage.

The ESP32-CAM has the option to use either the built-in antenna or an external antenna. If your ESP32-CAM AI-Thinker has no Wi-Fi connection or poor connection, it might have the external antenna enabled.If you connect an external antenna to the connector, it should work fine.

Check if the jumper 0K resistor by the antenna connector is in the proper position for the desired antenna. There are 3 little white squares laid out like a “<” with the middle position being common.

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (11)

The following photo shows a closer look at that area. You can clearly see a small 0K resistor connecting to the built-in antenna.

ESP32-CAM Troubleshooting Guide: Most Common Problems Fixed | Random Nerd Tutorials (12)

With board turned so the the PCB antenna is up:

  • To use the PCB antenna, the resistor must be on the top position, like this: /
  • For the antenna connector, the resistor must be on the bottom position, like this: \

So, to enable the on-board antenna:

  • Unsolder the resistor that goes to the antenna, it’s in this position \
  • And solder together the two connections to enable the on-board antenna.

8. No IP Address in Arduino IDE Serial Monitor

f you just see dots printed in the serial monitor (……), it means that your ESP32-CAM is not establishing a Wi-Fi connection with your router.

Double-check your network credentials

You need to make sure that you’ve typed your exact network credentials (SSID and password) in the following variables:

const char* ssid = "REPLACE_WITH_YOUR_SSID";const char* password = "REPLACE_WITH_YOUR_PASSWORD";

Select the right baud rate in the Arduino IDE Serial Monitor

If you don’t select the right baud rate in the Arduino IDE Serial Monitor, you won’t get your board IP address or you’ll just get garbage on the screen.

Make sure you select the right baud rate. In our examples with the ESP32-CAM, we use 115200 baud rate.

Reset the board multiple times

You might also need to press the ESP32-CAM on-board RESET button multiple times to restart your ESP and print the IP address during boot.

(Video) Exploring the ESP32 Camera

RX and TX swapped

Double-check the connections between your ESP32 board and the FTDI programmer. RX goes to TX and TX goes to RX. If these connections are swapped, the ESP32-CAM is not able to establish a serial communication with your computer.

Wi-Fi Range

If the router is far away from your ESP32 board, it might not be able to catch the Wi-Fi signal. Ensure that your ESP32-CAM is fairly close to your router.

9. Can’t open web server

If the ESP32-CAM is printing the IP address in your Arduino IDE Serial Monitor, but when you try to open the web server in your web browser you see a blank screen, it usually means that you are trying to access the ESP32-CAM web server with multiple web browser tabs.

At the moment, these ESP32-CAM sketches only work with one client connected at a time.

10. The image lags/shows lots of latency

Having some latency is normal for such a small and cheap camera. Some readers have suggested the following to reduce latency:

  • Power the ESP32-CAM with a standalone 5V power supply
  • Reduce the frame size with the following in your code:
    config.frame_size = FRAMESIZE_SVGA or config.frame_size = FRAMESIZE_VGA
  • Use an external antenna.

11. esp_camera_fb_get(): Failed to get the frame on time!

We’ve personally never faced this issue. However, many readers are getting this error with their ESP32-CAM boards.

One of our readers (Fibula) suggested the following to solve this issue:

“Im using the ESP32-CAM Module 2MP OV2640 Camera sensor Module Type-C USB module from Aliexpress. Although not mentioned, It doesn’t have the extra PSRAM the other M5 models do, and the camera has one changed IO pin.

See here:https://github.com/m5stack/m5stack-cam-psram/blob/master/README.mdand scroll down to Interface Comparison.

The CameraWebServer Arduino example we’re probably all using doesn’t have this ESP32-CAM model defined.

You need to add it yourself in the main tab add:

#define CAMERA_MODEL_M5STACK_NO_PSRAM

And in the camera_pins.h tab add the following:

#elif defined(CAMERA_MODEL_M5STACK_NO_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

And you’re good to go.

Also note that the max resolution of the bare ESP32-CAM Module is XGA 1024×768, I assume also because of the lack of PSRAM. “

We hope this suggestion solves your issue. Let us know in the comments section.

Using larger microSD card sizes

According to he datasheet, the ESP32-CAM should only supports 4GB microSD cards.

However, we’ve tested with 16GB microSD card and it works well.

You might not be able to store more than 4GB, even though you have 16GB. We haven’t tested storing more than 4GB, so we’re not sure about this.

Are these projects compatible with M5Stack board?

Yes, the M5Stack ESP32 board is compatible with out projects. However, you must check your camera pinout to ensure you have the right assignment in the code.

You can check the M5Stack camera connections here.

How to set a fixed the IP Address

To set a static/fixed IP address, you can follow the next tutorial:

  • ESP32 Static/Fixed IP Address

Setting ESP32-CAM as Access Point (AP)

You can set your ESP32-CAM as an Access Point (AP). This means you are able to connect to your ESP32-CAM directly without having to connect to your router. You can use the following code to set your video streaming web server as an Access Point:

/********* Rui Santos Complete project details at https://RandomNerdTutorials.com/esp32-cam-video-streaming-web-server-camera-home-assistant/ IMPORTANT!!! - Select Board "AI Thinker ESP32-CAM" - GPIO 0 must be connected to GND to upload a sketch - After connecting GPIO 0 to GND, press the ESP32-CAM on-board RESET button to put your board in flashing mode 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 credentialsconst char* ssid = "ESP32-Access-Point";const char* password = "123456789";#define PART_BOUNDARY "123456789000000000000987654321"// This project was tested with the AI Thinker Model, M5STACK PSRAM Model and M5STACK WITHOUT PSRAM#define CAMERA_MODEL_AI_THINKER//#define CAMERA_MODEL_M5STACK_PSRAM//#define CAMERA_MODEL_M5STACK_WITHOUT_PSRAM// Not tested with this model//#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"#endifstatic 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.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_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; 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; } // Connect to Wi-Fi network with SSID and password Serial.print("Setting AP (Access Point)…"); // Remove the password parameter, if you want the AP (Access Point) to be open WiFi.softAP(ssid, password); IPAddress IP = WiFi.softAPIP(); Serial.print("Camera Stream Ready! Connect to the ESP32 AP and go to: http://"); Serial.println(IP); // Start streaming web server startCameraServer();}void loop() { delay(1);}

View raw code

To better understand how it works, you can read the next tutorial:

  • ESP32 Access Point (AP) for Web Server

[eBook] Build ESP32-CAM Projects using Arduino IDE

Learn how to program and build 17 projects with the ESP32-CAM using Arduino IDEDOWNLOAD »

Learn how to program and build 17 projects with the ESP32-CAM using Arduino IDE DOWNLOAD »

(Video) ESP32-CAM Take Photo and Save to MicroSD Card

Wrapping Up

We hope you’ve found this troubleshooting guide useful and you were able to make your ESP32-CAM work with our projects.

If you have any other issues or suggestions on how to fix them, please post a comment below.

(Video) Arduino IDE + ESP32 Cam + PIR Motion Detector | Take Photo and Save to MicroSD Card

If you like this project, you may also like other projects with the ESP32-CAM:

  • ESP32-CAM AI-Thinker Pinout Guide: GPIOs Usage Explained
  • Video Streaming, Face Detection and Face Recognition
  • Build ESP32-CAM Projects (eBook)
  • Read all our ESP32-CAM Projects, Tutorials and Guides

Thank you for reading.

P.S. It is very difficult to understand what’s wrong with your project when we can’t reproduce the error on our end. However, if you post the error, there might be other readers with the same issue/solution, so we encourage you to interact in the comment’s section.

FAQs

How do you troubleshoot ESP32? ›

Here are some steps that you can try to:
  1. Check your USB cable and try a new one.
  2. Change the USB port.
  3. Check your power supply.
  4. In some instances, you must keep GPIO0 LOW during the uploading process via the serial interface.
  5. Hold down the “BOOT” button in your ESP32 board while uploading/flashing.

How do I reset my ESP32-CAM? ›

Open your Serial Monitor, making sure it is set to a baud rate of 115,200 bps. Then press the Reset switch on the ESP32-CAM module.

How do I reprogram my ESP32-CAM? ›

1) Go to Tools > Board and select AI-Thinker ESP32-CAM. You must have the ESP32 add-on installed. Otherwise, this board won't show up on the Boards menu. 2) Go to Tools > Port and select the COM port the ESP32-CAM is connected to.

How do you fix a fatal error occurred failed to connect to ESP32 timed out waiting for packet header? ›

press and hold RESET, press BOOT, release Reset and then release BOOT, you will have connection and you will be able to upload your program.

How does ESP32 cam work? ›

Overview. The ESP32-CAM is a small size, low power consumption camera module based on ESP32. It comes with an OV2640 camera and provides onboard TF card slot. The ESP32-CAM can be widely used in intelligent IoT applications such as wireless video monitoring, WiFi image upload, QR identification, and so on.

How do I factory reset my ESP32? ›

Download . bin and Enter Bootloader
  1. Download the factory-reset-and-bootloader. bin file. ...
  2. Enter ROM bootloader mode. Entering the ROM bootloader is easy. ...
  3. Connect. ...
  4. Erase the Contents.
  5. Program the ESP32-S2/S3.
  6. Test the Installation. ...
  7. Connect. ...
  8. Installing the Bootloader.

How many times can you Flash an ESP32? ›

Nearly all Espressif chips are made to work with at least 100,000 cycles, so you have to do some more flashing before breaking the board!

What is reset button on ESP32? ›

Reset button: pressing this button resets the system. Boot. Download button: holding down the Boot button and pressing the EN button initiates the firmware download mode. Then user can download firmware through the serial port.

How do I find the IP address of my ESP32 camera? ›

Getting the IP address

Open the Serial Monitor at a baud rate of 115200. Press the ESP32-CAM on-board Reset button. The ESP32 IP address should be printed in the Serial Monitor.

Which software do we need to program the ESP32 controller? ›

You'll need Espressif's software library ( esp-idf), a cross-compiler and build tools that are specific to the chip ( xtensa-esp32-*) , and a utility to flash the resulting binary file to the device.

How many Wi-Fi devices can connect to ESP32? ›

[Connect] How many devices is ESP32 able to connect in AP mode? ¶ Up to 10 devices in AP mode. It is configured to support four devices by default.

How many connections can ESP32 handle? ›

When using ESP32 device as the server of Bluetooth® LE, how many client devices can be connected? ¶ The ESP32 Bluetooth LE supports up to nine client devices for connection.

How many serial ports does the ESP32 have? ›

There are three serial ports on the ESP32 known as U0UXD, U1UXD and U2UXD. U0UXD is generally used to communicate with the ESP32 for programming and during reset/boot. U1UXD is unused and can be used for your projects. Some boards use this port for SPI Flash access though!

Can ESP32-CAM work without WiFi? ›

It is possible to use ESP-cam without internet to start recording video and stop.

Why ESP32-CAM is used? ›

ESP32-CAM can be widely used in various IoT applications. It is suitable for home smart devices, industrial wireless control, wireless monitoring, QR wireless identification, wireless positioning system signals and other IoT applications. It is an ideal solution for IoT applications.

What is the range of ESP32-CAM? ›

the ESP32-CAM has a very competitive small-size camera module that can operate independently as a minimum system with a footprint of only 27*40.5*4.5mm and a deep sleep current of up to 6mA.

What voltage is ESP32? ›

The ESP32's operating voltage range is 2.2 to 3.6V. Under normal operation the ESP32 Thing will power the chip at 3.3V.

Which language is best for ESP32? ›

MicroPython is a re-implementation of Python programming language targeted for microcontrollers and embedded systems like the ESP32 or ESP8266. Programming in MicroPython is very similar to programming in Python: all of the language features of Python are also in MicroPython, apart from a few exceptions.

What code language is used for ESP32? ›

ESP-IDF is Espressif's official IoT Development Framework for the ESP32, ESP32-S, ESP32-C and ESP32-H series of SoCs. It provides a self-sufficient SDK for any generic application development on these platforms, using programming languages such as C and C++.

What does ESP restart do? ›

restart() and ESP. reset() causes ESP to bootloop (ESP keep restarting, never start the program again). Unfortunately ESP didn't print any exception. In the debug message below, the program ran first time after Uploading.

What is bootloader in ESP32? ›

The ESP-IDF Software Bootloader performs the following functions: Minimal initial configuration of internal modules; Initialize Flash Encryption and/or Secure features, if configured; Select the application partition to boot, based on the partition table and ota_data (if any);

How do I know if my ESP32 is working? ›

The first and most basic test that can be done is to power up the board via a USB cable and to check that the red LED lights up as shown in the image below. This confirms that the 3.3V power from the on-board regulator is working.

What are the disadvantages of ESP32? ›

Disadvantages of ESP32: support only Wi-FI networks with a frequency range of 2.4 GHz – they will not connect to a modern 5 GHz network.

How long can a ESP32 last? ›

Neglecting voltage effects, a small 3.7V, 850mAh rechargeable battery would be able to power an ESP32 in modem-sleep for approximately 12.5 hours. Light-sleep could run for over 1000 hours.

Can ESP32 be hacked? ›

A new Bluetooth vulnerability known as BrakTooth has been publicized, impacting the popular Espressif ESP32 IoT chip.

Which pin is for power in ESP32? ›

There are two power pins viz. VIN pin & 3.3V pin. The VIN pin can be used to directly supply the ESP32 and its peripherals, if you have a regulated 5V voltage source. The 3.3V pin is the output of an on-board voltage regulator.

How do you wake up ESP32? ›

The ESP32 is in deep sleep mode now. You can wake it up by pressing the pushbuttons. Open the Serial Monitor at a baud rate of 115200. Press the pushbuttons to wake up the ESP32.

What is the role microcontroller in ESP32? ›

FREE GUIDE: Introduction to Microcontrollers

This is basically an ESP32 module mounted on a board with additional support circuitry such as a voltage regulator and a serial to USB IC. It allows direct connection to a desktop PC that can then be used to compile, download, and run programs directly on this module.

Can ESP32 connect to hidden SSID? ›

The ESP32 is unable to connect via the regular WiFi library to a hidden access point. Using the sample code in WiFi/examples/WiFiClient/WiFiClient. ino, providing a valid access point name and password, the code successfully connects if the access point is not hidden.

How does an ESP32 connect to the Internet? ›

The ESP32 has 2 WiFi modes: STATION ( WIFI_STA ) : The Station mode (STA) is used to connect the ESP32 module to a WiFi access point. The ESP32 behaves like a computer that is connected to our router. If the router is connected to the Internet, then the ESP32 can access the Internet.

How do I connect my ESP32 to WiFi without programming? ›

Step 4: Operation
  1. Use the phone to connect the WiFi “makerfabs-ap” build by the esp32.
  2. Enter the address “192.168. ...
  3. Enter your wifi information on the browser page.
  4. The ESP32 board connects to the WiFi after seconds.

Is ESP32 used in industry? ›

This ESP32 PLC it has been designed for Industrial applications. It allows the use of WiFi, Bluetooth LE, Ethernet IP protocol and other industrial Ethernet protocols like Modbus TCP and others.

How do you write ESP32 code? ›

STEP 1: Connect your ESP32 board to your computer through the micro-USB cable. Make sure the red LED goes high on the module to ensure power supply. STEP 4: Go back to Arduino IDE and under Tools -> Port select the Port to which your ESP is connected to.

What sensors does ESP32? ›

The ESP32 inside the M5Stack Core module has a built-in Hall effect sensor.

Is ESP32 waterproof? ›

M5Stack's New Industrial-Grade TOUGH ESP32 Dev Kit Is Waterproof and Dustproof.

What is the IP address of my ESP32? ›

Note: if you upload the next sketch to your ESP32 board, it should automatically assign the fixed IP address 192.168. 1.184. What is this?

Does ESP32 have its own Wi-Fi? ›

In Access Point (AP) mode, the ESP32 sets up its own WiFi network and acts as a hub, just like a WiFi router. However, unlike a WiFi router, it does not have an interface to a wired network. So, this mode of operation is called Soft Access Point (soft-AP).

How many types of ESP32 are there? ›

Moreover, two of the ESP32 chips – ESP32-D2WD and ESP32-PICO-D4 – have internally connected flash. The others are as follows: 0 MiB (ESP32-D0WDQ6, ESP32-D0WD, and ESP32-S0WD chips), 2 MiB (ESP32-D2WD chip), and 4 MiB (ESP32-PICO-D4 SiP module).

Can ESP32 measure voltage? ›

Reading an analog value with the ESP32 means you can measure varying voltage levels between 0 V and 3.3 V. The voltage measured is then assigned to a value between 0 and 4095, in which 0 V corresponds to 0, and 3.3 V corresponds to 4095.

Can ESP32 use WIFI and Bluetooth? ›

ESP32 can interface with other systems to provide Wi-Fi and Bluetooth functionality through its SPI / SDIO or I2C / UART interfaces.

How much RAM does an ESP32 have? ›

The ESP32 chip contains 520KB of RAM. While it's sufficient for most projects, others may need more memory. To increase the capacity of the microcontroller, the manufacturer can add a memory chip to the board. This external RAM chip is connected to the ESP32 via the SPI bus.

Does ESP32 have storage? ›

With the ESP32 and the EEPROM library you can use up to 512 bytes in the flash memory. This means you have 512 different addresses, and you can save a value between 0 and 255 in each address position.

Can ESP32 be both server and client? ›

One ESP32 board will act as a server and the other ESP32 board will act as a client. The following diagram shows an overview of how everything works. The ESP32 server creates its own wireless network (ESP32 Soft-Access Point).

How do you test for ESP32? ›

The first and most basic test that can be done is to power up the board via a USB cable and to check that the red LED lights up as shown in the image below. This confirms that the 3.3V power from the on-board regulator is working.

How do I check my ESP32 internet connection? ›

If you want to test internet connectivity the best way is to request http://google.com. If your device is connected to internet, you would get 301 as response code.

How do I know if my ESP32 cam is working? ›

If your ESP32-CAM AI-Thinker has no Wi-Fi connection or poor connection, it might have the external antenna enabled. If you connect an external antenna to the connector, it should work fine. Check if the jumper 0K resistor by the antenna connector is in the proper position for the desired antenna.

How many devices can connect to ESP32? ›

The ESP32 Bluetooth LE supports up to nine client devices for connection.

What does the reset button do on ESP32? ›

Reset button: pressing this button resets the system. Download button: holding down the Boot button and pressing the EN button initiates the firmware download mode. Then user can download firmware through the serial port.

How do I find my ESP32 IP address? ›

After uploading the code to your board, open the Arduino IDE Serial Monitor at the baud rate 115200, restart your ESP32 board and the IP address defined earlier should be assigned to your board. What is this? As you can see, it prints the IP address 192.168. 1.184.

Can ESP32 work without WiFi? ›

In this scenario, you need to be connected to your router (local network) to control the ESP32. But if you set the ESP32 as an access point (hotspot), you can be connected to the ESP32 using any device with Wi-Fi capabilities without the need to connect to your router.

Can I use ESP32 without WiFi? ›

The ESP32 doesn't need to have access to a router via Wi-Fi, because we'll connect to the internet using a SIM card data plan. What is this? In a previous project, we've created our own server domain with a database to plot sensor readings in charts that you can access from anywhere in the world.

How many analog pins does ESP32-CAM have? ›

The ESP32-CAM comes with three GND pins (colored in black color) and two power pins (colored with red color): 3.3V and 5V. You can power the ESP32-CAM through the 3.3V or 5V pins.

Videos

1. ESP32 Product Journey: Testing Existing Charge Circuit
(Kevin)
2. Build your KiloCam | Real World Science
(Austin Greene)
3. Tic Tac Camera Using ESP32CAM And Wireless Charging
(That Project)
4. ESP32/ESP8266 Relay Module - Control AC Appliances (Web Server)
(Rui Santos)
5. Raspberry Pi, ESP Projects, and HID Attack Q&A
(SecurityFWD)
6. Live Hacking Q&A with Kody and Alex
(SecurityFWD)
Top Articles
Latest Posts
Article information

Author: Lakeisha Bayer VM

Last Updated: 11/09/2022

Views: 6394

Rating: 4.9 / 5 (69 voted)

Reviews: 92% of readers found this page helpful

Author information

Name: Lakeisha Bayer VM

Birthday: 1997-10-17

Address: Suite 835 34136 Adrian Mountains, Floydton, UT 81036

Phone: +3571527672278

Job: Manufacturing Agent

Hobby: Skimboarding, Photography, Roller skating, Knife making, Paintball, Embroidery, Gunsmithing

Introduction: My name is Lakeisha Bayer VM, I am a brainy, kind, enchanting, healthy, lovely, clean, witty person who loves writing and wants to share my knowledge and understanding with you.