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For questions about the ESP32 series of microcontrollers. Use in conjunction with the “microcontroller” tag.
Hi, I would want to see what’s the maximum capacity of the MicroSD card to stay completely compatible with the ESP- 32 CAM specifications 32 Gb. further than 32Gb? Thank you for your answer, Nidhi Singh
Hi,
I would want to see what’s the maximum capacity of the MicroSD card to stay completely compatible with the ESP- 32 CAM specifications 32 Gb. further than 32Gb?
Thank you for your answer,
Nidhi Singh
Hi We’ve to get our hardware certified in a number of different countries. And to meet the certification process the ESP software will need to configure our hardware to different functional countries as there are a number of software-controlled DC/ DC ...Read more
Hi
We’ve to get our hardware certified in a number of different countries. And to meet the certification process the ESP software will need to configure our hardware to different functional countries as there are a number of software-controlled DC/ DC inventories on the hardware.
The challenge is that Espressif just supplies the FCC test software as a binary. I’ve communicated with Espressif to know if I can get the source code or in the binary library so that I can incorporate it into our test code, and they replied that won’t supply the code.
Does anyone know how to put the ESP32 into the needed modes for the certification process?
Regards
Read lessHi, I got a question that seems not easily answered in the HW documentation. ESP32-U4WDH which has an internal flash, does VDD_SDIO power needs to be connected at all? If so, shall it be connected to 100nF or VCC which is ...Read more
Hi,
I got a question that seems not easily answered in the HW documentation.
ESP32-U4WDH which has an internal flash, does VDD_SDIO power needs to be connected at all?
If so, shall it be connected to 100nF or VCC which is 3v3?
Thanks for your inputs
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Hello, To run internal flash in ESP32-U4WDH You'd need to connect it to a 100nF capacitor. Thank & Regards
Hello,
To run internal flash in ESP32–U4WDH You’d need to connect it to a 100nF capacitor.
Thank & Regards
See lessHello, I presently research and suppose about the possibilities to initial flash and later update the firmware on an ESP32 based product from the price point, I would like to use an ESP32-C3 and the built-in USB port to flash & ...Read more
Hello,
I presently research and suppose about the possibilities to initial flash and later update the firmware on an ESP32 based product from the price point, I would like to use an ESP32-C3 and the built-in USB port to flash & update the firmware.
That indeed would save the USB2UART chip.
I can’t go with the S2 as I need WiFi and Bluetooth.
But I didn’t find any tutorial/extended info if/how this is possible. The only things I found
so I currently don’t know if it’s possible. I hope anybody can shine some light on this for me;-)
Thank and Regards
Vikas
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Hello, Thanks for reaching out to Volt Engineering Community. The C3 has a USB device that effectively replaces an external USB- serial and USB- JTAG chip; you should be suitable to use that to flash updates. Please let us know if it answers your question. Regards, Ashish
Hello,
Thanks for reaching out to Volt Engineering Community.
The C3 has a USB device that effectively replaces an external USB- serial and USB- JTAG chip; you should be suitable to use that to flash updates.
Please let us know if it answers your question.
Regards,
Ashish
See lessHello, 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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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.
See lessHello and thanks in advance for the help. I recently entered my ESP32- C3 mini development kit. I’m sure it’s configured to use the CP2102 USB interface, so R1 and R4 are installed. I want to use the internal USB JTAG ...Read more
Hello and thanks in advance for the help.
I recently entered my ESP32- C3 mini development kit. I’m sure it’s configured to use the CP2102 USB interface, so R1 and R4 are installed. I want to use the internal USB JTAG interface which I understand requires the removal of R1 and R4 and the installation of R2 and R3( though I’m not sure this is the case). This would also free up RXD and TXD, which I need to use.
I haven’t been suitable to find documentation on how to use the Devkits with the USB JTAG, nor have I been suitable to determine the position of R1, R2, R3, and R4. I’ve tried” beeping out” the circuit but would prefer not to ruin my board.
Is there any guidance as to where those components are and/ or how to use a USB JTAG?
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The PCB layout of that dev board can be found then. As far as I can see, you need to rotate those resistors 90 degrees to move them from the red to the green position in this image: You probably also want to disconnect the RxD/TxD pins from the CP2104 to the ESP32C3 if you want to use those pins. YoRead more
The PCB layout of that dev board can be found then. As far as I can see, you need to rotate those resistors 90 degrees to move them from the red to the green position in this image:
You probably also want to disconnect the RxD/TxD pins from the CP2104 to the ESP32C3 if you want to use those pins. You can do that by removing R21/R22, I marked those in blue.
The built-in USB thing should more or less work as an extra UART inside the ESP32C3 and as a general CDC- ACM serial port(=no drivers needed) on the PC side. You do need to use the latest master of ESP-IDF to get full support for it, and if you specifically want to select the device as your press output UART in menuconfig, else, your debug messages will go to UART0.
On the JTAG side, just useesp_usb_jtag. cfg as your JTAG adapter, config file in OpenOCD and you should be good.
Still, feel free to post it here, If you need any further help. Support for the built-in USB-to-JTAG thing on the C3 is enough new, so I’d be interested in seeing how you fare with it.
Hello, I’ve lipo battery connected to tp4056 (with protection), and it’s connected to a 5v output boost module. How can I connect it to the board? And also can I have a USB connection to the board without burning the ...Read more
Hello, I’ve lipo battery connected to tp4056 (with protection), and it’s connected to a 5v output boost module. How can I connect it to the board? And also can I have a USB connection to the board without burning the module?
Hii, From boost converter (u really do not need it but anyway.) to ESP32- wroom 5v pin (from photo bottom left pin) and from charge- to GND (ANY OF THEM). Can connect a USB to the ESP32 WROOM directly (with this connection in place, no need to disconnect) and flash any firmware you want, also disconRead more
Hii, From boost converter (u really do not need it but anyway.) to ESP32- wroom 5v pin (from photo bottom left pin) and from charge- to GND (ANY OF THEM).
Can connect a USB to the ESP32 WROOM directly (with this connection in place, no need to disconnect) and flash any firmware you want, also disconnect the USB, and if the battery is full and it’ll work.
Can also connect a USB to the TP4056 for charging WHILE it feeds the ESP32.
You really do not need the Boost since the TP4056 will output3.7 v and you have a 1000mah (milli amps hour) battery which will allow the ESP32 to work for a good while (depending on what u are doing etc) before recharging. In this configuration just connect the OUT to3.3 v (top left) and OUT- to any GND pin.
But u will need a USB connection to load any firmware and later disconnect it and let the battery feed the ESP32.
Enjoy.
See lessHi, 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
Read lessHello, 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
See lessHello, I feel to have entered a’ faulty’ esp32 box with an issue detecting the wake word, I am sure it’s a simple HW issue and I’m further than happy to try repairing this rather of just returning it, I had ...Read more
Hello,
I feel to have entered a’ faulty’ esp32 box with an issue detecting the wake word, I am sure it’s a simple HW issue and I’m further than happy to try repairing this rather of just returning it, I had to stay 5 weeks to admit it.
I’ve updated it to the latest FW
https//youtu.be/gDq0usur58w
Read lessHello, However, you can try to disassemble it, If you're willing to try to fix it yourself. The microphones are on a separate board that's connected to the main board with a 6- pin FPC cable; it would probably be a good idea to check if that's still inserted and snug. Thanks
Hello,
However, you can try to disassemble it, If you’re willing to try to fix it yourself. The microphones are on a separate board that’s connected to the main board with a 6- pin FPC cable; it would probably be a good idea to check if that’s still inserted and snug.
Thanks
See lessHello, I am in the process of learning my way around microcontrollers and designing an IOT device that will include a thumb keyboard. The font used will be an older one used on BBS systems and I envision holding control keys ...Read more
Hello,
I am in the process of learning my way around microcontrollers and designing an IOT device that will include a thumb keyboard. The font used will be an older one used on BBS systems and I envision holding control keys to utilize the upper area of the fonts for drawing.
As similar, I am aware that the esp32 lacks the pins demanded to program a keyboard so I am thinking a keyboard controller chip would be needed. Does anyone have a recommendation on what I should use?
I looked up many but they feel to be more fit for a laptop and apparently preprogrammed.
Thanks & Regards
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Hi, Do all possible noise sources have to be enabled during purposeful radiator testing or just those directly coupled to the antenna? Obviously, there is some possibility of dealings between purposeful and unintentional radiator sources. This is how we get stuff like FCC complete modular instrumentRead more
Hi, Do all possible noise sources have to be enabled during purposeful radiator testing or just those directly coupled to the antenna? Obviously, there is some possibility of dealings between purposeful and unintentional radiator sources. This is how we get stuff like FCC complete modular instrument taking rf shielding and internal regulation. The unintentional radiator sources would be tested independently with purposeful radiators powered off. This may be different from other official authorities.
Obviously, espressif should give some support similar to allowing gpio control or Lua/upython scripting in the test binary or releasing a library that can be incorporated into IDF designs. perhaps too important fear of CW mode being turned into a jammer? At least it should be available under NDA and usage agreement.
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