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ESP32 WROOM 32 V1 - LED flashes, resets in Arduino IDE, what to do?

michalwyk2 423 7
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  • #1 21264679
    michalwyk2
    Level 2  
    Hi, I have recently started playing with the Esp32 wroom 32 V1 board, however lately the diode on the board has been flashing, and in the Arduino it goes on and off, as if it is resetting all the time. Is there any way to fix this, or is the only thing left to do is to buy a new board? If only buying, please give me some suggestions, I will add that I am interested in deuther projects and others of this type. Thank you for all the answers.
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  • #2 21267834
    mickpr
    Level 39  
    Start by checking the power supply performance (with a meter to see if the voltage drops).
    State what specific board model it is.
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  • #3 21270805
    michalwyk2
    Level 2  
    It's not the power supply's fault, as I've tried powering it via USB (with a port from my laptop, a cube from the charger and a phone with an org adapter) and a tested battery with a 3.3V voltage regulator via the "VIN" pin on the board.
    I think the model is simply ESP32 Dev Board V1, it has 30 pins and says "ESP32S" on the back.
  • #4 21270809
    inot
    Level 37  
    Have you checked that it doesn't actually reset?
  • #5 21270821
    michalwyk2
    Level 2  
    I don't know how to check it other than that it keeps appearing and disappearing in the device manager.
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  • #6 21270825
    inot
    Level 37  
    The Arduino Monitor shows what is happening at boot time.
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  • #7 21270845
    michalwyk2
    Level 2  
    The Serial Port Monitor only shows the message "Not connected", and only the "Esp32"/"Esp32 [not connected]" mark flashes alternately in the lower right corner. Only when I hold down and release the "EN" button does the terminal show: ESP32 WROOM 32 V1 - LED flashes, resets in Arduino IDE, what to do? ESP32 WROOM 32 V1 - LED flashes, resets in Arduino IDE, what to do? .

    Added after 3 [minutes]: .

    And I've noticed that the voltage regulator is getting quite hot, so I'll check tomorrow to see if the power consumption jumps and other such.
  • #8 21270852
    inot
    Level 37  
    What settings do you have?
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Topic summary

The ESP32 WROOM 32 V1 board exhibits continuous LED flashing and resets when used with the Arduino IDE, causing the device to repeatedly connect and disconnect from the computer. The user confirmed the power supply is stable, having tested USB power from multiple sources and a 3.3V regulated battery via the VIN pin. The board is identified as an ESP32 Dev Board V1 with 30 pins and marked "ESP32S" on the back. The Arduino Serial Monitor shows "Not connected" until the EN (enable) button is manually pressed and released, after which boot messages briefly appear. The voltage regulator on the board becomes hot, suggesting possible power consumption issues. Suggestions include verifying power supply stability with a meter, checking board settings in the Arduino IDE, and monitoring boot messages to diagnose resets.
Summary generated by the language model.
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