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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: June 22, 2023In:
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Hii, I have the raw ESP32 S3 with a self-made Inverted-F antenna. I can scan for different WiFis and can discover quite a some with fine signal strength. I can not, still, connect to any WiFi. It tries to connect ...Read more

Hii, I have the raw ESP32 S3 with a self-made Inverted-F antenna.
I can scan for different WiFis and can discover quite a some with fine signal strength.
I can not, still, connect to any WiFi. It tries to connect forever. Even when I get really very close to the router.
similarly, creating an AP doesn’t give an error, but the AP doesn’t become visible when scanning with other devices.

I assume there’s some error that prevents me from * transferring * anything.
What could be the issue?

Thank you in advance.

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antennaesp32espressifinvertedtransferringwifi
  1. Julian White

    Hello! It sounds like you're having trouble connecting your ESP32 S3 to WiFi and creating an access point. There could be a few different issues causing this, but here are a few things you could check: Make sure you are using the correct WiFi credentials. Double-check the SSID and password you are uRead more

    Hello! It sounds like you’re having trouble connecting your ESP32 S3 to WiFi and creating an access point. There could be a few different issues causing this, but here are a few things you could check:

    1. Make sure you are using the correct WiFi credentials. Double-check the SSID and password you are using to connect to the WiFi network. If you’re not sure, try connecting to a different WiFi network with known credentials to see if that works.
    2. Check that your antenna is properly connected to the ESP32 S3. Make sure the antenna is securely attached and that the connection is not loose. You could also try using a different antenna to see if that solves the problem.
    3. Check your code to ensure that you are properly configuring the ESP32 S3 to connect to the WiFi network or create an access point. Make sure you are using the correct libraries and functions to connect to WiFi and create an access point.
    4. Check the power supply to your ESP32 S3. Make sure it is receiving enough power to operate properly. You could try using a different power source or adding a capacitor to help stabilize the power supply.
    5. Try resetting your ESP32 S3 to its default settings. This can sometimes help clear up any configuration issues that may be causing the problem.

    I hope these suggestions help you get your ESP32 S3 up and running! Let me know if you have any further questions.

    Thank You

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Alex thomas
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Alex thomas
Asked: May 3, 2023In:
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Hello. Is there a way to enter bootloader/ download mode by calling a certain function in the user app? For example, I am aware of a function CODE SELECT ALL esp_restart() that will only reset the CPU and it’ll boot back to the user ...Read more

Hello.

Is there a way to enter bootloader/ download mode by calling a certain function in the user app?
For example, I am aware of a function

CODE SELECT ALL
esp_restart()

that will only reset the CPU and it’ll boot back to the user app.
But what I want is another function or a number of codes that resets the CPU and makes it so that it wouldn’t jump to the user app and rather would stay in the bootloader.
I searched, but could not discover any information on that. I tried configuring GPIO9 strapping pin as an output, writing 0 to it, and calling the esp_restart() function, but that did not work, probably because strapping pins aren’t sampled after the software reset.

Thank You

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bootloadercpuesp32espressifgpio9
  1. Julian White

    Hello @Alex, Probably. Note that this register is typically intended for DWC- OTG use, and as the C3 doesn't have this, I am not sure if we tested the functionality there, but you can try the following CODE SELECT ALL (RTC_CNTL_OPTION1_REG,RTC_CNTL_FORCE_DOWNLOAD_BOOT); esp_restart(); Thank You JuliRead more

    Hello Alex thomas,

    Probably. Note that this register is typically intended for DWC- OTG use, and as the C3 doesn’t have this, I am not sure if we tested the functionality there, but you can try the following
    CODE SELECT ALL

    (RTC_CNTL_OPTION1_REG,RTC_CNTL_FORCE_DOWNLOAD_BOOT);
esp_restart();

    Thank You

    Julian White

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Alex thomas
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Alex thomas
Asked: April 20, 2023In:
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Hey, I am creating a smash barrier controller with ESP32 SX1276 LoRa microcontroller, and I require a 5V external power force, but I can not find anywhere which pin of 5V is the VIN one, I do not want to ...Read more

Hey, I am creating a smash barrier controller with ESP32 SX1276 LoRa microcontroller, and I require a 5V external power force, but I can not find anywhere which pin of 5V is the VIN one, I do not want to ruin my module, so does anyone know this particular module and which of the 5V pins is the VIN one? I have uploaded the board setup for reference purposes. If you want any extra information please let me know.

Thank You

Alex Thomas

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esp32espressifloramicrocontrollermodulepinsx1276vin
  1. nidhi singh
    This answer was edited.

    Hello, They are likely both connected to the Vin signal; check with a multimeter if there is continuance between the two pins if you want to make sure. Thank You Nidhi Singh

    Hello,

    They are likely both connected to the Vin signal; check with a multimeter if there is continuance between the two pins if you want to make sure.

    Thank You

    Nidhi Singh

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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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