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    LILYGO® T5 4.7 Inch E-paper V2.3 ESP32-S3 not access serial port

    Common problems
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    • S
      sobrevela last edited by

      It has stopped recognizing the serial ports,
      I attach images of the arduino and the windows device manager where it is shown when the board is connected and disconnected.

      Captura de pantalla (44).png

      with the board connected, port failure

      Captura de pantalla (46).png

      without the board connected

      Captura de pantalla (45).png

      I have tried a factory reset with the buttons but I have not succeeded

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      • H
        harvey last edited by

        I have the same issue
        It appears after trying to install the application https://github.com/Xinyuan-LilyGO/LilyGo-EPD-4-7-OWM-Weather-Display

        During the 10 seconds when the COM port is up, I receive from the terminal :

        ESP-ROM:esp32s3-20210327
        Build:Mar 27 2021
        rst:0x15 (USB_UART_CHIP_RESET),boot:0xc (SPI_FAST_FLASH_BOOT)
        Saved PC:0x4208db6e
        SPIWP:0xee
        mode:DIO, clock div:1
        load:0x3fce3808,len:0x44c
        load:0x403c9700,len:0xbe4
        load:0x403cc700,len:0x2a38
        entry 0x403c98d4
        

        Using command line tool esptool.py :

        c:\tmp>esptool.py --baud 115200 --port COM3 read_mac
        esptool.py v4.3
        Serial port COM3
        Connecting...
        Detecting chip type... ESP32-S3
        Chip is ESP32-S3 (revision v0.1)
        Features: WiFi, BLE
        Crystal is 40MHz
        MAC: 68:b6:b3:20:8c:0c
        Uploading stub...
        Running stub...
        Stub running...
        MAC: 68:b6:b3:20:8c:0c
        Hard resetting via RTS pin...
        

        If you have a soluce, thanks to help us

        H 1 Reply Last reply Reply Quote 0
        • H
          harvey @harvey last edited by

          Finaly I find a solution.
          My problem was probably an invalid application.
          I have reinstalled hello_word program with a right bootloader, following pages :

          https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/get-started/windows-setup.html

          https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-py.html

          I type following commands :

          idf.py set-target esp32s3 
          idf.py build
          cd build
          esptool.py -c esp32s3 -p COM3 --before=default_reset --after=hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 2MB 0x0 bootloader\bootloader.bin 0x10000 hello_world.bin 0x8000 partition_table\partition-table.bin
          
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