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Espressif  is a public multinational, semiconductor company established in 2008, with offices in China, the Czech Republic, India, Singapore and Brazil. Focused on developing wireless communication, low-power AIoT solutions. Creating the popular ESP8266, ESP32, ESP32-S, ESP32-C and ESP32-H series of chips, modules and development boards.

Espressif supports a large variety of open-source projects, including SDKs, components, libraries, solutions, and tools, which aim to help developers bring their projects to life. Espressif’s chips, modules and development boards are widely deployed in products as home appliances, light bulbs, smart speakers, consumer electronics and payment terminals.

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ashishgawade
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ashishgawade
Asked: February 17, 2023In:
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Hi, It’s my first post today. I am building a lock system and in my result, I need to control 2 selenoids (Independently). Basically, I am looking for a way to switch the impulse between pins. The system is based on QR ...Read more

Hi,

It’s my first post today. I am building a lock system and in my result, I need to control 2 selenoids (Independently). Basically, I am looking for a way to switch the impulse between pins.

The system is based on QR verification. External software will be communicating with esp and esp (based on the input) will decide which selenoid should open.

I am mostly a web dev with a lack of expertise in embedded stuff and so far I’ve made simple solutions based on one of the youtube tutorials. It looks like this (esp instead of raspberry).

I wonder how I could extend this construction to achieve the below. Do I need an alternate 12v supply, alternate relay, etc? Or maybe some transistors? I would appreciate any hint

Thank You

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esp32espressifraspberysolenoidtransistors
  1. vikas Nagpal

    You're practically correct! You need two modules, but one 12V supply is enough. You can wire the 12V and GNDs together. You have to be alert, the power supply should be suitable to power both solenoids, so in the case of two 2A solenoids, you need a 4A collection.

    You’re practically correct!

    You need two modules, but one 12V supply is enough. You can wire the 12V and GNDs together. You have to be alert, the power supply should be suitable to power both solenoids, so in the case of two 2A solenoids, you need a 4A collection.

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nidhi singh
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nidhi singh
Asked: January 24, 2023In:
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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

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32gbcamcardesp32espressifmicrosd
  1. vikas Nagpal

    Hello Nidhi, Above 32 GB, the card has to be formatted applying the exFAT filesystem. exFAT is supported in IDF through the FatFS library, but the support is disabled by default. You can modify #defineFF_FS_EXFAT 0 in ffconf.h from 0 to 1, and also rebuild the operation. Thank You

    Hello Nidhi,

    Above 32 GB, the card has to be formatted applying the exFAT filesystem.
    exFAT is supported in IDF through the FatFS library, but the support is disabled by default. You can modify #defineFF_FS_EXFAT 0 in ffconf.h from 0 to 1, and also rebuild the operation.

    Thank You

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ashishgawade
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ashishgawade
Asked: January 12, 2023In:
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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

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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.

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vikas Nagpal
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vikas Nagpal
Asked: December 28, 2022In:
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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 & ...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

  • DFU — Using the native USB on ESP32-S2 for flashing the firmware
  • Nearly was mentioned that C3 USB can be used in CDC mode
  • CircuitPython on Espressif SoCs

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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bluetoothesp32espressiffirmwareusbusb2uartwifi
  1. ashishgawade

    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

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Alex thomas
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Alex thomas
Asked: November 18, 2022In:
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Hello, I would like to ask why my ESP32 wrover resets every time the contactor on the ‘power line’ closes else it works OK. Regards Alex

Hello, I would like to ask why my ESP32 wrover resets every time the contactor on the ‘power line’ closes else it works OK.

Regards

Alex

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connectivitycontactoresp32espressifpower linewirelesswrover
  1. nidhi singh

    Hello, Likely either EMC or a power force dip. Make sure the power supply of the ESP is well-isolated from the contactor coil. Thanks & Regards Nidhi Singh

    Hello, Likely either EMC or a power force dip. Make sure the power supply of the ESP is well-isolated from the contactor coil.

    Thanks & Regards

    Nidhi Singh

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cleaneatzkitchen
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cleaneatzkitchen
Asked: November 8, 2022In:
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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!

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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.

     

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vikas Nagpal
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vikas Nagpal
Asked: September 10, 2022In:
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Maybe here in the ADF forum are some Lyra- T users. I’ve a Lyra- T( using WROVER- B) and I’m trying to get JTAG debugging working on Windows. I’ve tried both VSCODE ane decline. Both detect the chip via JTAG, but ...Read more

Maybe here in the ADF forum are some Lyra- T users.

I’ve a Lyra- T( using WROVER- B) and I’m trying to get JTAG debugging working on Windows. I’ve tried both VSCODE ane decline. Both detect the chip via JTAG, but I do not get any step further.
Anyone here having more success, or even can confirm it must be possible with the Lyra- T?

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esp32espressifjtaglyra-t
  1. nidhi singh

    The JTAG debugging issues I was having when using VSCode, ESP-IDF Extension, and ESP-PROG *may* have been caused by the ESP-OpenOCD v0.11.0-esp32-20220411. When I replaced it with ESP-OpenOCD v0.11.0-esp32-20220706, I was able to flash via JTAG and Start/Stop debug session without seeing any errors.

    The JTAG debugging issues I was having when using VSCode, ESP-IDF Extension, and ESP-PROG *may* have been caused by the ESP-OpenOCD v0.11.0-esp32-20220411. When I replaced it with ESP-OpenOCD v0.11.0-esp32-20220706, I was able to flash via JTAG and Start/Stop debug session without seeing any errors.
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Rahul B
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Rahul B
Asked: August 9, 2022In:
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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?

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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.

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Alex thomas
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Alex thomas
Asked: August 2, 2022In:
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While using ESP32-S3-WROOM-1-N8R8 module for my application. I used GPIO20 as a GPIO input for switch application. I have used external pull up for digital high or low. But in that pin ,there is an inbuilt internal pullup. But it ...Read more

While using ESP32-S3-WROOM-1-N8R8 module for my application. I used GPIO20 as a GPIO input for switch application. I have used external pull up for digital high or low. But in that pin ,there is an inbuilt internal pullup. But it isn’t mentioned in datasheet.

Kindly suggest how to change that pin to Hi-Z state.

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ESP32-S3-WROOM-1-N8R8 moduleespressifgpioGPIO20Hi-Z state