Home/esp

volt.tech Latest Questions

ashishgawade
  • 0
ashishgawade
Asked: January 12, 2023In:
  • 0

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 less
certificationemcespesp32espressiffccsoftware
  1. Alex thomas

    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.

    See less
    • 0
Anonymous
  • 0
Anonymous
Asked: December 30, 2022In:
  • 0

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 ...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

Read less
espesp32flashU4WDHuartusb
  1. vikas Nagpal

    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 less
    • 0
vikas Nagpal
  • 0
vikas Nagpal
Asked: December 23, 2022In:
  • 0

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!

Read less
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.

    See less
    • 0
viewpointproducts
  • 0
viewpointproducts
Asked: November 29, 2022In:
  • 0

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 ...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 less
espesp32mcumicrocontroller
  1. nidhi singh

    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

    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 less
    • 0
cleaneatzkitchen
  • 0
cleaneatzkitchen
Asked: November 8, 2022In:
  • 0

Hi! I’m applying the LED Control (LEDC) PWM to control the servo motor, it worked well. And now I need to control further than 8, I’ve checked the ESP32 datasheet, and there have 16 channels can use 8 in High – ...Read more

Hi!

I’m applying the LED Control (LEDC) PWM to control the servo motor, it worked well.
And now I need to control further than 8, I’ve checked the ESP32 datasheet, and there have 16 channels can use 8 in High – speed mode, and 8 in Low – speed mode.
But the ledc library does not support low- speed mode right now, is there any way to use led pwn in low- speed mode?
Like, write the register directly?

thanks!

Read less
datasheetespesp32espressifledledcuart
  1. Alex thomas

    Not sure if the driver does not support all 16 channels. they may just not be supporting the low- speed option of the low- speed channels. But anyway, if you want to poke at the registers yourself, the LED PWM controller is documented in the TRM. Do not forget to actually turn the peripheral on, andRead more

    Not sure if the driver does not support all 16 channels. they may just not be supporting the low- speed option of the low- speed channels. But anyway, if you want to poke at the registers yourself, the LED PWM controller is documented in the TRM. Do not forget to actually turn the peripheral on, and you should get it going enough quickly.

     

    See less
    • 0
Anonymous
  • 0
Anonymous
Asked: August 11, 2022In:
  • 0

Can ESP32-WROVER-E module use one I2S line to realize simultaneous broadcasting and recording?

Can ESP32-WROVER-E module use one I2S line to realize simultaneous broadcasting and recording?

Read less
broadcastingesprecording
  1. nakhtar

    Yes, it can be done ESP32-LyraT Development Board.

    Yes, it can be done ESP32-LyraT Development Board.

    See less
    • 0
Anonymous
  • 0
Anonymous
Asked: August 11, 2022In:
  • 0

Does Alexa solution have certain requirements for environmental noise?

Does Alexa solution have certain requirements for environmental noise?

Read less
alexaesp
  1. nakhtar

    The current Espressif voice solution can meet the environmental requirements of a signal-to-noise ratio of less than 5dB, and for some fixed noise scenarios, it can also be less than 0dB (need to be optimized for the actual product).

    The current Espressif voice solution can meet the environmental requirements of a signal-to-noise ratio of less than 5dB, and for some fixed noise scenarios, it can also be less than 0dB (need to be optimized for the actual product).

    See less
    • 0
Anonymous
  • 0
Anonymous
Asked: August 11, 2022In:
  • 0

What is the maximum power of supported speakers for ESP32 series audio development board?

What is the maximum power of supported speakers for ESP32 series audio development board?

Read less
espesp audioesp32
  1. nakhtar

    ESP32 development board uses NS4150 PA by default, and its maximum power is 3 W according to its datasheet.

    ESP32 development board uses NS4150 PA by default, and its maximum power is 3 W according to its datasheet.

    See less
    • 0
Rahul B
  • 1
Rahul B
Asked: August 9, 2022In:
  • 1

Is it possible to use this device as a ESP32- S3 development kit, or is it limited to configuring the GPIO pins and integrating with the app?

Is it possible to use this device as a ESP32- S3 development kit, or is it limited to configuring the GPIO pins and integrating with the app?

Read less
espesp32espressifgpio
  1. geek

    It can be used as a ESP32- S3 development kit, you can see the PMOD marker to get the available GPIO. However, configuring the GPIO does not need through the app, If you tone development commodity. The mobile app is used with the figure- in firmware.

    It can be used as a ESP32- S3 development kit, you can see the PMOD marker to get the available GPIO. However, configuring the GPIO does not need through the app, If you tone development commodity. The mobile app is used with the figure- in firmware.

    See less
    • 0
techfreak
  • 0
techfreak
Asked: July 29, 2022In:
  • 0

I am testing “esp_sleep_enable_uart_wakeup” function. I have connected to UART0 (GPIO3 U0RX, GPIO1 U0TX) an external LTE module and I would like to wake up ESP32 when it is in light sleep but the external module send a particular string on ...Read more

I am testing “esp_sleep_enable_uart_wakeup” function.

I have connected to UART0 (GPIO3 U0RX, GPIO1 U0TX) an external LTE module and I would like to wake up ESP32 when it is in light sleep but the external module send a particular string on the UART0.

I have done a very simple test. It seems to work, but as soon as I change these configuration for CONSOLE debug output from the default to the below ones:

CONFIG_CONSOLE_UART_DEFAULT= CONFIG_CONSOLE_UART_CUSTOM=y CONFIG_CONSOLE_UART_NONE= CONFIG_CONSOLE_UART_CUSTOM_NUM_0= CONFIG_CONSOLE_UART_CUSTOM_NUM_1=y CONFIG_CONSOLE_UART_NUM=1 CONFIG_CONSOLE_UART_TX_GPIO=25 CONFIG_CONSOLE_UART_RX_GPIO=27 CONFIG_CONSOLE_UART_BAUDRATE=115200

It doesn’t work. I would like to use UART1 to send out the debugs because UART0 is occupied to talk with the external module: but the changes in the SDK config (only the one reported above) seems to be the cause of the issue.

How to solve the issue?

Read less
espgpioLTE modulesleep_enableuart
  1. pallavi sharma

    You have to do this PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_U0RXD_U0RXD); PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD_U0TXD);

    You have to do this

    PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_U0RXD_U0RXD);
PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD_U0TXD);
    See less
    • 0