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For questions about the ESP32 series of microcontrollers. Use in conjunction with the “microcontroller” tag.

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vikas Nagpal
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vikas Nagpal
Asked: September 23, 2022In:
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Position Detection using ESP32

Hello,for a design, I am developing I need to see if an object( in my case, a bottle) is present on a shelf. There are 3 rows and 12 columns for each shelf, which is about 60 cm x ...Read more

Hello,
for a design, I am developing I need to see if an object( in my case, a bottle) is present on a shelf. There are 3 rows and 12 columns for each shelf, which is about 60 cm x 150 cm. I can use further than 1 cam to see the objects.
I never used any type of image recognition, so I would like to understand if you suppose it’s a good idea- in your opinion- to use a cam to capture the bottle on the shelf and also make an image recognition.
What do you think about it? Could it be possible? What instruments and libraries should I use?
Thanks!

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developingesp32
vikas Nagpal
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vikas Nagpal
Asked: September 15, 2022In:
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Looking at the ESP32- S3 datasheet section 3.5.2 Serial supplemental Interface( SPI), in the SPI2 General­purpose SPI( GP­SPI) mode part it’s mentioned that SPI2 can do DDR at 40Mhz while in half duplex mode. In the design i’ve a SPI slave chip that does DDR on the MISO line, as in MISO line needs to be sampled at both edges of the SCLK line. It’s not ...Read more

Looking at the ESP32- S3 datasheet section 3.5.2 Serial supplemental Interface( SPI), in the SPI2 General­purpose SPI( GP­SPI) mode part it’s mentioned that SPI2 can do DDR at 40Mhz while in half duplex mode.

In the design i’ve a SPI slave chip that does DDR on the MISO line, as in MISO line needs to be sampled at both edges of the SCLK line. It’s not a flash/ ram chip, so I need to drive the SPI2 in the general purpose mode.

I wanted to confirm that this is what the datasheet says, but looking at API docs for ESP- IDF for ESP32- S3 only talks about SPI DDR for external flash modules.

Can someone clarify, can I use SPI2 in general purpose master mode with half duplex, to sample the MISO line on both edges of SCLK?

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ddrESP-IDFesp32esp32-s3spi2
  1. nidhi singh

    It does have a DDR feature, but I do not think this point is in the driver yet. Can you share what chip you are trying to communicate with? I can tell the driver team what to focus on if I file an issue to apply this.

    It does have a DDR feature, but I do not think this point is in the driver yet. Can you share what chip you are trying to communicate with? I can tell the driver team what to focus on if I file an issue to apply this.

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vikas Nagpal
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vikas Nagpal
Asked: September 13, 2022In:
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I would like to know if it was possible ever to keep connected the micro usb of the esp32- cam- mb to load the module and in the meantime check the consumption( Ampere) from a multimeter. I tried to connect the multimeter in any way but failed Thanks

I would like to know if it was possible ever to keep connected the micro usb of the esp32- cam- mb to load the module and in the meantime check the consumption( Ampere) from a multimeter.

I tried to connect the multimeter in any way but failed
Thanks

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esp32esp32-cam-mbmodulemultimeter
  1. ashishgawade

    Sure. Take a USB lead, cut off the external isolation, find the red wire, cut it in two, and connect the multimeter in between. Make sure the internal resistance/ burden voltage of your multimeter isn't too high if the voltage drop of the multimeter is too high, your ESP32 may brown out. ( You can tRead more

    Sure. Take a USB lead, cut off the external isolation, find the red wire, cut it in two, and connect the multimeter in between. Make sure the internal resistance/ burden voltage of your multimeter isn’t too high if the voltage drop of the multimeter is too high, your ESP32 may brown out. ( You can try switching to the 10A range when you suppose that happens.)

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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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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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Alex thomas
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Alex thomas
Asked: September 1, 2022In:
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Hello, Can i’ve reply for below queries for the ESP32-MINI-1-N4? 1) Can we connect external NOR flash on VSPICS0, VSPICLK, VSPID, VSPIQ of ESP32-MINI-1-N4? 2) Can we use GPIO0 asI2C_SDA and GPIO4 asI2C_SCL in ESP32-MINI-1-N4? 3) What maximum size of NOR flash can be connected with ESP32-MINI-1-N4? 4) Can we configure any GPIos as UART1 RTS & ...Read more

Hello,

Can i’ve reply for below queries for the ESP32-MINI-1-N4?
1) Can we connect external NOR flash on VSPICS0, VSPICLK, VSPID, VSPIQ of ESP32-MINI-1-N4?
2) Can we use GPIO0 asI2C_SDA and GPIO4 asI2C_SCL in ESP32-MINI-1-N4?
3) What maximum size of NOR flash can be connected with ESP32-MINI-1-N4?
4) Can we configure any GPIos as UART1 RTS & CTS of ESP32-MINI-1-N4?

Thanks,

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esp32esp32-mini-1-n4flashgpio0
  1. nidhi singh

    I. Yes, you could use VSPI to connect a alternate flash, but just for storage, this flash couldn't share same function with the embedded one. 2. Yes, you could use them as I2C, but please add test point for IO0. 3. for storage, at least 16 MB, I've seen some cases, I'll check it. 4. Yes, but please Read more

    I. Yes, you could use VSPI to connect a alternate flash, but just for storage, this flash couldn’t share same function with the embedded one.
    2. Yes, you could use them as I2C, but please add test point for IO0.
    3. for storage, at least 16 MB, I’ve seen some cases, I’ll check it.
    4. Yes, but please be noted those only for inputs can only be RX.

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vikas Nagpal
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vikas Nagpal
Asked: August 29, 2022In:
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Hello, I’ve enforced OTA on ESP32 through WiFi by setting up server on ESP32, and likewise through WiFi by using http. Now I want to do OTA with http but through GSM network. I’ve enforced ESP32 SIM800L module communication to the pall, ...Read more

Hello,
I’ve enforced OTA on ESP32 through WiFi by setting up server on ESP32, and likewise through WiFi by using http.

Now I want to do OTA with http but through GSM network.

I’ve enforced ESP32 SIM800L module communication to the pall, so my GSM connection is good.

Can any bone please let me know of an illustration for OTA on ESP32 through GSM?

Thankyou.

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esp32gsmotasim800lwifi
  1. Alex thomas

    There's no difference between doing it through GSM or wifi or ethernet, any http functions including OTA will just use whatever interface is configured. You should just have to run esp_https_ota( & config) nearly in your app and it'll work.

    There’s no difference between doing it through GSM or wifi or ethernet, any http functions including OTA will just use whatever interface is configured.
    You should just have to run esp_https_ota( & config) nearly in your app and it’ll work.

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vikas Nagpal
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vikas Nagpal
Asked: August 25, 2022In:
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Basically the question is in the title: Is it possible to use an existing videotape stream from a CCTV surveillance system rather of camera and apply facial discovery on it using ESP- WHO?

Basically the question is in the title: Is it possible to use an existing videotape stream from a CCTV surveillance system rather of camera and apply facial discovery on it using ESP- WHO?

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cameracctvesp-whoesp32video
  1. Twinkle Garg

    Yes! You may try input surveillance images( RGB888 or RGB565) to the interface of face discovery model. But perhaps you need to check image quality first, if it's wide- view/ high- resolution, the discovery performance might be affected, e.g. detention might be long.

    Yes! You may try input surveillance images( RGB888 or RGB565) to the interface of face discovery model.
    But perhaps you need to check image quality first, if it’s wide- view/ high- resolution, the discovery performance might be affected, e.g. detention might be long.

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vsharma
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vsharma
Asked: August 22, 2022In:
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How we’re implemented SPI poling in ESP32- S2- WROOM module. But now I need to apply SPI DMA for Transmit and admit. is ESP32- S2- WROOM module supports SPI DMA? actually we searched in github, I find SPI DMA stack ...Read more

How we’re implemented SPI poling in ESP32- S2- WROOM module. But now I need to apply SPI DMA for Transmit and admit.
is ESP32- S2- WROOM module supports SPI DMA?
actually we searched in github, I find SPI DMA stack but in that no DMA related functions.

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dmaesp32moduletransmit
  1. Techworld

    Given that you're using the ESP-IDF SPI driver and assign a DMA channel to the host driver when initializing it, you're already using DMA. The driver will use DMA for data transfers automatically.

    Given that you’re using the ESP-IDF SPI driver and assign a DMA channel to the host driver when initializing it, you’re already using DMA. The driver will use DMA for data transfers automatically.
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Avs Mohan
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Avs Mohan
Asked: August 19, 2022In:
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When esp_mqtt_client_start was caleed, it takes 7 seconds to return connected state. Then I set up that it took lower than 1 second to connect from the launch to return OK. Is there any way to shorten the time ahead?

When esp_mqtt_client_start was caleed, it takes 7 seconds to return connected state. Then I set up that it took lower than 1 second to connect from the launch to return OK. Is there any way to shorten the time ahead?

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esp32launchmqttslow
  1. Sandeep kumar

    hello,   It isn't experiencing a "bottleneck" problem. I believe that every time his device reconnects to the wifi, there is a delay. The amount of time it takes to connect to wifi can vary depending on your proximity to the network and can take several seconds. I experienced the same issue witRead more

    hello,

     

    It isn’t experiencing a “bottleneck” problem. I believe that every time his device reconnects to the wifi, there is a delay. The amount of time it takes to connect to wifi can vary depending on your proximity to the network and can take several seconds.

    I experienced the same issue with remote sensors that required deep sleep in order to conserve battery. It was necessary for a sensor to re-connect to the network after an incident that caused it to awaken from deep slumber. The system as a whole was slowed down by the normalisation of connection time required for sensor synchronisation. Espressif’s ESP-Now is the answer it offers to this specific issue.

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