Search found 32 matches

by don.vukovic
Sat Feb 21, 2026 7:55 pm
Forum: General Discussion
Topic: Is there a way to use an HC-06 BT module ...
Replies: 1
Views: 73

Is there a way to use an HC-06 BT module ...

Is there a way to use an HC-06 BT module as a slave to the ESP32 master ???

I would like to create a HC-06 module as a game controller with any version of ESP32.
by don.vukovic
Sat Apr 06, 2024 10:16 pm
Forum: ESP8266
Topic: Capture dateTime.html
Replies: 1
Views: 7029

Capture dateTime.html

Hello All,

I am trying to create a html file that will return the date and time from a web browser.

The goal is to have the ESP start in Access Point Mode (no actual internet access)
send an html file to the client that shows an local date/time, such as:

================== dateTime.html
<!DOCTYPE ...
by don.vukovic
Thu Jan 18, 2024 7:09 pm
Forum: Hardware
Topic: What flash memory chip to use
Replies: 1
Views: 1827

What flash memory chip to use

I would like to upgrade the flash memory chip in the ESP32-WROOM module.
What part number should I use ?
Thanks
by don.vukovic
Mon May 09, 2022 5:54 pm
Forum: General Discussion
Topic: Initial flash needed for download boot over internal USB?
Replies: 5
Views: 5856

Re: Initial flash needed for download boot over internal USB?

Is there a page that describes this functionality ?

Are there example code available ?
by don.vukovic
Tue Feb 01, 2022 5:50 pm
Forum: Sample Code
Topic: BLE to BLE
Replies: 1
Views: 17445

BLE to BLE

Can BLE code be setup in a master to connect to only one BLE slave ?

Can the BLE slave reject all masters except one ?

Thank You
by don.vukovic
Wed Mar 24, 2021 9:19 pm
Forum: General Discussion
Topic: How does the ESP32 core execute code from the serial FLASH ?
Replies: 1
Views: 2992

How does the ESP32 core execute code from the serial FLASH ?

Is there a web page that describes how the ESP32 core, executes code from a single serial FLASH chip ?
What does the timing look like during execution ?
How is a single FLASH chip shared between the two ESP32 cores ?

I have seen diagrams with a serial FLASH and a serial RAM connected to the same ...
by don.vukovic
Sat Sep 05, 2020 9:02 pm
Forum: ESP32 Arduino
Topic: BasicOTA and OTAWebUpdater hangs
Replies: 2
Views: 4059

Re: BasicOTA and OTAWebUpdater hangs

I found my problem, maybe helpful for someone else.
This project is to have an SD Card for the next part of this project.
I wired the SDCard socket and inserted the SDcard.
When I remove the SDCard, everything works ?!?
So, somewhere the VSPI pins are used for something not listed in the source ...
by don.vukovic
Sat Sep 05, 2020 6:33 pm
Forum: ESP32 Arduino
Topic: BasicOTA and OTAWebUpdater hangs
Replies: 2
Views: 4059

BasicOTA and OTAWebUpdater hangs

I learned about these OTA*.ino files last week.
I loaded them up, but after the message "Booting" they both just hang.

I had a problem with the compiler complaining, so I removed ESP32_Arduino and reinstalled it via the "Boards Manager".
Both now compile but hangs ??
Is this a known problem or may ...
by don.vukovic
Wed Jul 03, 2019 8:28 pm
Forum: Hardware
Topic: ESP-WROOM-32 & SDMMC & CH340G
Replies: 3
Views: 7159

Re: ESP-WROOM-32 & SDMMC & CH340G

I added the extra isolation transistor, but I have the same proble.
I can not go into programming mode with the SD card inserted.

Please see attached schematic.
by don.vukovic
Mon Jul 01, 2019 1:23 am
Forum: Hardware
Topic: ESP-WROOM-32 & SDMMC & CH340G
Replies: 3
Views: 7159

ESP-WROOM-32 & SDMMC & CH340G

I need some advice.
I have designed a PCB using a ESP-WROOM-32 & SDMMC & CH340G.
The problem is that the CH340G uses the two transistors for set the programming mode.
If I have an SD card inserted into it's socket, the WROOM will not go into programming mode.
I release the SD card, and its fine.

Is ...

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