ESP_32 Cam programming not working

Other Hardware General Electronics
1

I want to program a esp_32 cam board and it tries to connect but says "A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
". What am I doing wrong? When ...... appears, I also push reset. Connection still fails. I also have problems to connect with a flashing programm to upload bin files, probably the is a connection between these problems.

2

You have to connect IO pin 0 to GND, and then press RESET. This will put the ESP32 into programming mode and you can then upload a sketch.

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3

I have already tried it, like you showed me. It seemed like connections were not working. I used an Arduino as a programmer and this worked.

4

In my case, I use ESP32CAM-with ESP32-CAM-MB. When I try to upload, the output from Arduino IDE 2.0.1 says:
Sketch uses 259509 bytes (8%) of program storage space. Maximum is 3145728 bytes.
Global variables use 16456 bytes (5%) of dynamic memory, leaving 311224 bytes for local variables. Maximum is 327680 bytes.
"C:\Users\AM\AppData\Local\Arduino15\packages\esp32\tools\esptool_py\4.2.1/esptool.exe" --chip esp32 --port "COM8" --baud 460800 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 80m --flash_size 4MB 0x1000 "C:\Users\AM\AppData\Local\Temp\arduino-sketch-BCBA2A5ED81698DEF75E253FCF78DC4E/BlinkAja.ino.bootloader.bin" 0x8000 "C:\Users\AM\AppData\Local\Temp\arduino-sketch-BCBA2A5ED81698DEF75E253FCF78DC4E/BlinkAja.ino.partitions.bin" 0xe000 "C:\Users\AM\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.5/tools/partitions/boot_app0.bin" 0x10000 "C:\Users\AM\AppData\Local\Temp\arduino-sketch-BCBA2A5ED81698DEF75E253FCF78DC4E/BlinkAja.ino.bin"
esptool.py v4.2.1
Serial port COM8
Connecting......................................

A fatal error occurred: Failed to connect to ESP32: No serial data received.
For troubleshooting steps visit: Troubleshooting - ESP32 - — esptool.py latest documentation
Failed uploading: uploading error: exit status 2esptool.py v4.2.1

My setting:
-windows-device manager-com8:115200 bps
-Arduino IDE Serial Monitor:New Line 115200 baud

My question:

  1. How do I know the setting of the serial ports is matched, I saw the parameter --port "COM8" --baud 460800 from the output, did it means the baudrate should be set to that value?. In my window's device manager the maximum choice of bps is 128000.
  2. Can we check the correctness of the serial communication using serial monitor (IDE2.0.1) and reset button?, I try changing the baudrate on the serial monitor while resetting the button, but the output is unreadable characters
  4. I have no problem using USB-TTL, it works ok on uploading the sketch program
  5. I have already tried with two different ESP32-CAM-MB without any success
5

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