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Category: Wireless Connectivity

A Wireless Connectivity is a computer network that uses wireless data connections between network nodes. Wireless networking is a method by which homes, telecommunications networks and business installations avoid the expensive process of introducing lines into a structure, or as a connection between various equipment locations. Examples of wireless networks include cell phone networks, wireless local area networks( WLANs), wireless sensor networks, satellite communication networks, and terrestrial microwave networks.

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vikas Nagpal
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vikas Nagpal
Asked: September 27, 2022In:
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Is ESP32-S3-EYE a Real Board?

Is the ESP32- S3- EYE a real board- i.e. is it available anywhere or does anyone know where it’ll be? I’m looking for a better newer reference platform for CV( AI/ ML) stuff. If not the ESP-32-EYE- any recommendations on a ...Read more

Is the ESP32- S3- EYE a real board- i.e. is it available anywhere or does anyone know where it’ll be?

I’m looking for a better newer reference platform for CV( AI/ ML) stuff. If not the ESP-32-EYE- any recommendations on a better one? ( Or should I stay for this newer one to come available?)
That said- any English translations of the README.md on the ESP- WHO design would be appreciated.

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esp-whoesp32esp32-s3-eyewireless connectivity
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
  1. ashishgawade

    The problem will be simpler if you can use a single camera above the shelf, and good contrast colors. also, you're just counting circular patches of not-shelf- color or bottle-cap- color. OpenCV might be oversupply for that, but probably has the exact law already written. Still, counting gets harderRead more

    The problem will be simpler if you can use a single camera above the shelf, and good contrast colors. also, you’re just counting circular patches of not-shelf- color or bottle-cap- color. OpenCV might be oversupply for that, but probably has the exact law already written.
    Still, counting gets harder, If you must look edge- on the shelf. But just detecting something is on the shelf( not counting) might be as simple as painting the wall behind the shelf a contrasting color and counting patches of not- background- color with further than N pixels.
    Good lighting will be important.

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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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Alex thomas
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Alex thomas
Asked: September 14, 2022In:
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Which wireless remote controls are FCC pre-certified?

Which wireless remote controls are FCC pre-certified?

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controlsfccremotewireless
  1. ashishgawade

    The keyfob transmitters and the handheld transmitters all have FCC and Industry Canada transmitter certifications. The 433 MHz versions have also been tested and found to conform to the ETSI RED directive.

    The keyfob transmitters and the handheld transmitters all have FCC and Industry Canada transmitter certifications. The 433 MHz versions have also been tested and found to conform to the ETSI RED directive.

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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 8, 2022In:
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What’s the difference between WiFi and WLAN?

What’s the difference between WiFi and WLAN?

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frequencyradiowifiwlan
  1. Vipul Verma

    1. WLAN is a type of computer network in a relatively small area that dismisses the use of physical means of inter-connectivity. 2. WI-FI is a trademark name to brand devices compliant to IEEE 802.11 standards. 3. Devices in a WLAN essentially use WI-FI branded products. 4. A WI-FI ready device simpRead more

    1. WLAN is a type of computer network in a relatively small area that dismisses the use of physical means of inter-connectivity.

    2. WI-FI is a trademark name to brand devices compliant to IEEE 802.11 standards.

    3. Devices in a WLAN essentially use WI-FI branded products.

    4. A WI-FI ready device simply means that it is ready for network operation within a WLAN.

     

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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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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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