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    PCB Design for ESP32 Stand alone module

    PCB Designing
    pcb esp32
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    • S
      Sharmila @Sharmila last edited by

      And having one more doubt !
      Bootloader for esp32 will present already or we need to load the bootloader code into the newly brought esp32 chip ?

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      • kowshik1729
        kowshik1729 last edited by

        @Sharmila If you're programming the board for the first time using Arduino IDE then you need to burn the bootloader into the bare IC. I have a doubt when you said the IC is not getting programmed even though the GPIO0 is low.

        I wanna know is GPIO0 low all the time or did you pull it low momentarily using a button??

        S 1 Reply Last reply Reply Quote 0
        • S
          Sharmila @kowshik1729 last edited by

          @kowshik1729 Yes i m programming the board first time using arduion. GPIO 0 is low all the time.

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          • kowshik1729
            kowshik1729 last edited by kowshik1729

            @Sharmila GPIO0 must not be low all the time. It must be held low only for a moment. Because GPIO0 is a boot strap option for choosing between UART download and normal operation. Please refer to the datasheet and search boot strap. And also can you please post a snap of your newly designed board please?

            S 2 Replies Last reply Reply Quote 1
            • S
              Sharmila @kowshik1729 last edited by Sharmila

              @kowshik1729 thank you for the hint ! i will check it . schematic picture of my board is given below

              (freesnippingtool.com_capture_20200721122206.png)

              saheen_palayi 1 Reply Last reply Reply Quote 1
              • S
                Sharmila @kowshik1729 last edited by

                @kowshik1729 sorry, gpio 0 is low only till it is programmed. after that this will disconnected.

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                • kowshik1729
                  kowshik1729 last edited by

                  @Sharmila Reviewed your schematics. Have the following doubts

                  1. Is this a USB receptacle?

                  4f585013-72f9-4ceb-bc72-8fa40ff32a36-image.png

                  1. Didn't find any option where you can pull the GPIO0 low and bring it back to normal state. Did you have a jumper connection or button between GPIO0 and GND?
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                  • S
                    Sharmila last edited by

                    1. no.
                    2. we are using jumper for gpio 0th pin. please refer the below image.
                      freesnippingtool.com_capture_20200721200934.png
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                    • saheen_palayi
                      saheen_palayi @Sharmila last edited by

                      This post is deleted!
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