Search found 31 matches

by don.vukovic
Sat Apr 06, 2024 10:16 pm
Forum: ESP8266
Topic: Capture dateTime.html
Replies: 1
Views: 5062

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 ht...
by don.vukovic
Thu Jan 18, 2024 7:09 pm
Forum: Hardware
Topic: What flash memory chip to use
Replies: 1
Views: 1175

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: 5147

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: 7672

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: 2694

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 pin...
by don.vukovic
Sat Sep 05, 2020 9:02 pm
Forum: ESP32 Arduino
Topic: BasicOTA and OTAWebUpdater hangs
Replies: 2
Views: 3670

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 file...
by don.vukovic
Sat Sep 05, 2020 6:33 pm
Forum: ESP32 Arduino
Topic: BasicOTA and OTAWebUpdater hangs
Replies: 2
Views: 3670

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 t...
by don.vukovic
Wed Jul 03, 2019 8:28 pm
Forum: Hardware
Topic: ESP-WROOM-32 & SDMMC & CH340G
Replies: 3
Views: 6489

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: 6489

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 ...
by don.vukovic
Tue Jun 25, 2019 1:36 am
Forum: ESP-IDF
Topic: printf baud rate ?
Replies: 1
Views: 3719

printf baud rate ?

I have downloaded PlatformIO and have set it up for ESP32. I loaded hello world and it has compiled and programmed my Sparkfun ESP32-thing board. The LED is flashing but the serial serial monitor shows nothing but junk. I tried to connect Teraterm to find the right board rate, but nothing works. So,...