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Alex thomas
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Alex thomas
Asked: March 29, 2023In:
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Hello, I am designing a PCB that’s using the built-in serial/JTAG controller and OTG peripheral of the ESP32-S3. It can not hold a physical boot or reset buttons. It has a USB-C container with the D/D- lines connected to GPIO20 and ...Read more

Hello,

I am designing a PCB that’s using the built-in serial/JTAG controller and OTG peripheral of the ESP32-S3. It can not hold a physical boot or reset buttons. It has a USB-C container with the D/D- lines connected to GPIO20 and GPIO19, respectively.

Are there any ways of going without buttons for reset or is an external USB to UART IC needed?

For boot mode choosing I exactly hold a jumper that when shorted pulls GPIO0 to GND, is there a better way to do that without a button?

Any help is appreciated.

Thank You

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bootcontrollersesp32firmwaregpio19GPIO20internaljtagpcbserial
  1. ashishgawade

    Hello, The USB-serial-JTAG port can usually reset/put the chip into boot mode without any external components. It's still advised to have some way to pull IO0 low for initial programming and during development, if you make a mistake where e.g. your program disables the USB function. A jumper will peRead more

    Hello,

    The USB-serial-JTAG port can usually reset/put the chip into boot mode without any external components. It’s still advised to have some way to pull IO0 low for initial programming and during development, if you make a mistake where e.g. your program disables the USB function. A jumper will perform that function just fine.

    Thank You

    Ashish

     

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vikas Nagpal
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vikas Nagpal
Asked: December 23, 2022In:
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Hello, I was searching for a PCB antenna design for ESP32. In the hardware design guideline document, it states to follow Espressif’s Type-B antenna, but I couldn’t find it. Any leads or advice to design the PCB antenna is highly appreciated. ESP32 ...Read more

Hello,

I was searching for a PCB antenna design for ESP32. In the hardware design guideline document, it states to follow Espressif’s Type-B antenna, but I couldn’t find it. Any leads or advice to design the PCB antenna is highly appreciated.

ESP32 Hardware Design Guideline document – https://www.espressif.com/sites/default … nes_en.pdf

Page 13 second para

Thanks in advance!

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antennaespesp32espressif’spcb
  1. nidhi singh

    Hi Vikas, you can download the modules' reference designs from www.espressif.com/en/support/download/documents, ESP32- WROOM- 32D and ESP32- WROVER- B have the latest antenna designs. You may also directly use modules unless you have reasons for designing your own layout.

    Hi Vikas, you can download the modules’ reference designs from http://www.espressif.com/en/support/download/documents, ESP32- WROOM- 32D and ESP32- WROVER- B have the latest antenna designs. You may also directly use modules unless you have reasons for designing your own layout.

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Alex thomas
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Alex thomas
Asked: December 6, 2022In:
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Hi, I purchased a couple of ESP32- C3 mini modules for a design. The modules are being mounted on the PCB board, I tried to flash/ program them for the application using a customized board (simplified schematic of esp32- c3 ...Read more

Hi, I purchased a couple of ESP32- C3 mini modules for a design. The modules are being mounted on the PCB board, I tried to flash/ program them for the application using a customized board (simplified schematic of esp32- c3 dev- board). The issue is that the system is unable to communicate with the module. I also replaced the module on an esp32-c3-mini dev board with the purchased one but still facing the same issue with the flashing. The question is that

Whether the esp32- c3 modules, in the market, are needed to be pre-programmed prior to the flashing process?

How I can flash the modules?

Any help comment/ guide will be appreciated!

Best Regards,

Alex

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boarddevesp32esp32c3minimodulespcb
  1. nidhi singh

    Hello, I just spent quite a bit of time figuring out why I could not upload to my own boards, so I appreciate what you are experiencing. The ESP32- C3- Mini modules don't need to be preprogrammed. You can write firmware to them directly using esptool.py I programmed mine using the Arduino IDE, whichRead more

    Hello,

    I just spent quite a bit of time figuring out why I could not upload to my own boards, so I appreciate what you are experiencing.
    The ESP32- C3- Mini modules don’t need to be preprogrammed. You can write firmware to them directly using esptool.py
    I programmed mine using the Arduino IDE, which uses esptooly.py under the hood.
    Still, we might be suitable to help, If you share what your custom programming board looks like.

    Thank You & Regards

    Nidhi

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nidhi singh
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nidhi singh
Asked: November 14, 2022In:
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Hi there! I’m designing a PCB at the moment using the ESP32- C3-MINI-1. One thing I’m wondering is, how to design the board in such a way, that I’m suitable to upload my application without pressing the boot and enable buttons ...Read more

Hi there!

I’m designing a PCB at the moment using the ESP32- C3-MINI-1.
One thing I’m wondering is, how to design the board in such a way, that I’m suitable to upload my application without pressing the boot and enable buttons without using an external USB to Serial CP 2102 or similar.
For the ESP32- WROOM- 32D it was possible to use a configuration of 2 transistors, which brought the ESP into upload mode.

I have not seen anything similar for the ESP32- C3- MINI without a USB to the serial- adapter.
How would this be achieved here?

I am thankful for any assistance.

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esp32ESP32-C3esp32-c3-mini-1esp32-wroom-32dpcbusbwroom
  1. Alex thomas

    Still, you would use exactly the same circuit but with IO0 replaced with IO0, If you were to use something like a CP2102 or other USB-serial chip. Still, you generally do not need the auto-reset circuit as that functionality is built-in If you are intending to use GPIO18/ 19 to program the ESP32C3 dRead more

    Still, you would use exactly the same circuit but with IO0 replaced with IO0, If you were to use something like a CP2102 or other USB-serial chip.

    Still, you generally do not need the auto-reset circuit as that functionality is built-in If you are intending to use GPIO18/ 19 to program the ESP32C3 directly. (But do note that you may want to have * some * way to manually put the C3 into download mode while developing if you do something that stops the internal USB-serial- JTAG from working, like accidentally configuring the USB pins as GPIOs).

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Alex thomas
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Alex thomas
Asked: September 7, 2022In:
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Hello, I have tested ESP32- C3-MINI-1 module thanks to ESP32- C3- DevKit- 1. Very satisfied, I plan to use ESP32- C3-MINI-1 module on my futures PCB designs. When my PCB manufacturer will reference some ESP32- C3-MINI-1 module, is there a firmware ...Read more

Hello,

I have tested ESP32- C3-MINI-1 module thanks to ESP32- C3- DevKit- 1.
Very satisfied, I plan to use ESP32- C3-MINI-1 module on my futures PCB designs.
When my PCB manufacturer will reference some ESP32- C3-MINI-1 module, is there a firmware pre-programmed?
Does that default firmware/ bootloader allows me to upload my Arduino operation via uart ( RX0/ TX0, or make in USB Serial) like I do with my ESP32- C3- DevKit- 1 with Arduino IDE?

Or do I need to firstly flash a bootloader through some JTAG or SPI?

Thank you!

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c3-miniesp32ESP32-C3pcbusb
  1. vikas Nagpal

    There either is no firmware in flash, or a testing or AT firmware that is likely not useful. That doesn't matter, however, because: Every ESP32 (including C3, S3, ...) has a hardcoded, unchangable and un-erasable ROM that contains a bootloader that allows you to do these things (as long as you don'tRead more

    There either is no firmware in flash, or a testing or AT firmware that is likely not useful. That doesn’t matter, however, because: Every ESP32 (including C3, S3, …) has a hardcoded, unchangable and un-erasable ROM that contains a bootloader that allows you to do these things (as long as you don’t set the efuse to disable them). So whatever firmware the module comes with, you will be able to reprogram it using UART or USB.

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Raja Singh
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Raja Singh
Asked: May 17, 2022In:
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I am working on Renesas RA2L1 kit , my code finalize on Renesas kit, now we are going to make PCB , for this PCB I want to know about programming pin connector. Can you help to share programming pin ...Read more

I am working on Renesas RA2L1 kit , my code finalize on Renesas kit, now we are going to make PCB , for this PCB I want to know about programming pin connector. Can you help to share programming pin connector so that I can make one my PCB.

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pcbra2l1RA2L1 SERIESrenesasrenesas ra2l1
  1. Shivali Singh

    Dear Raja Ji, Please find the attached details FYR.   Regards Shivali Singh

    Dear Raja Ji,

    Please find the attached details FYR.

     

    Regards

    Shivali Singh

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    Attachment

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