Search found 56 matches

by GeorgeFlorian1
Tue Apr 16, 2019 11:30 am
Forum: ESP32 Arduino
Topic: On-Board LED on the Wrover-B ?
Replies: 1
Views: 95

On-Board LED on the Wrover-B ?

Hello ! Short Story: The Wroom-32 DevKitV1 has a LED assigned to GPIO 2. What is the GPIO for the on-board LED on a Wrover-B ? It doesn't seem to have one, though. Long Story: I got to play around with a Wrover-B DevKitV4 and I don't find any documentation on it. The documentation I found showcased ...
by GeorgeFlorian1
Tue Apr 16, 2019 11:20 am
Forum: ESP32 Arduino
Topic: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
Replies: 9
Views: 469

Re: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

The Boot button is 0. I'd suggest opening your serial monitor. Then hold down Boot, don't be shy, you can't do it too early and there's no harm in holding it longer than necessary. Give the reset button a good click and you should see some output saying that it's in download mode. Make sure that wo...
by GeorgeFlorian1
Tue Apr 16, 2019 7:55 am
Forum: ESP32 Arduino
Topic: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header
Replies: 9
Views: 469

Re: A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

By the end of compile connect GPIO0 to GND and keep it till end of upload. See if you are able to upload. After upload you remove this connection. You can use a jumper wire. I am using the 30 pins ESP32: https://i1.wp.com/randomnerdtutorials.com/wp-content/uploads/2018/08/ESP32-DOIT-DEVKIT-V1-Board...
by GeorgeFlorian1
Fri Apr 12, 2019 8:36 am
Forum: ESP32 Arduino
Topic: PxMatrix + ESPAsyncWebServer = Guru Meditation Errors ! A lot of them
Replies: 0
Views: 90

PxMatrix + ESPAsyncWebServer = Guru Meditation Errors ! A lot of them

Hello ! OS: Linux Mint 17.1 Board: Wrover-B DevKitV4 Display: 2727 SMD P5 64x32 I am trying to serve some webpages using ESPAsyncWebServer library and to simultaneously use a LED Display using PxMatrix library. Separately, the 2 libraries work perfectly, but together they screw up everything I've wo...
by GeorgeFlorian1
Wed Apr 10, 2019 11:33 am
Forum: Hardware
Topic: [SOLVED] Trying to use PxMatrix library
Replies: 1
Views: 165

Re: Trying to use PxMatrix library

The problems were the wires ! The multi colored wires: https://i.postimg.cc/W1WH3FFT/20190409-154238.jpg If you squeeze them tight all the pixel noise disappears and it works perfectly. I've ended up using E pin aswell. #define P_E 15 PxMATRIX display(64,32,P_LAT, P_OE,P_A,P_B,P_C,P_D,P_E); display....
by GeorgeFlorian1
Wed Apr 10, 2019 9:23 am
Forum: ESP32 Arduino
Topic: [SOLVED] Can't upload sketch on ESP32 while it's connected to board
Replies: 6
Views: 371

Re: Can't upload sketch on ESP32 while it's connected to board

d12 needs to be left open or pulled low at start up assuming your powering your board with 3.3v I would imagine the input of the converter it connects to must be hi z so that should be ok. read about all the strapping pins here: https://github.com/espressif/esptool/wiki/ESP32-Boot-Mode-Selection I'...
by GeorgeFlorian1
Tue Apr 09, 2019 2:27 pm
Forum: Hardware
Topic: [SOLVED] Trying to use PxMatrix library
Replies: 1
Views: 165

[SOLVED] Trying to use PxMatrix library

Hello ! I am trying to use a LED Display and an ESP32. Display: 2727 SMD P5 64x32 Board: ESP32 Wrover-B DevKitV4 I've done the wiring as it was written in the ReadMe. I thought I did a mistake so I redid the wiring and still nothing. https://i.postimg.cc/HxFD6TqD/Px-Matrix-Schematics.png I've also r...
by GeorgeFlorian1
Fri Apr 05, 2019 3:21 pm
Forum: Hardware
Topic: Can't find documentation/ pin layout of the following Wrover model
Replies: 4
Views: 198

Re: Can't find documentation/ pin layout of the following Wrover model

WiFive wrote:
Fri Apr 05, 2019 1:36 pm
You can't use 6-11,16-17. 34-39 are input. 0,2,12 require some consideration. 1&3 are uart. That leaves 15 others.
That is perfect !

I've ended up using the following GPIOs : 4, 13, 14, 15, 18, 19, 21, 22, 23, 25, 26, 27, 32, 33.

From what you've told me there shouldn't be any problem.
by GeorgeFlorian1
Fri Apr 05, 2019 1:12 pm
Forum: Hardware
Topic: Can't find documentation/ pin layout of the following Wrover model
Replies: 4
Views: 198

Re: Can't find documentation/ pin layout of the following Wrover model

https://docs.espressif.com/projects/esp-idf/en/latest/hw-reference/modules-and-boards.html#esp32-devkitc-v4 Also, if GPIO 16 and 17 are used for the PSRAM that means that I can't use them ? Correct, I don't think they are even connected to the exterior module pads Thank you for your answer. The pag...
by GeorgeFlorian1
Fri Apr 05, 2019 11:11 am
Forum: Hardware
Topic: Can't find documentation/ pin layout of the following Wrover model
Replies: 4
Views: 198

Can't find documentation/ pin layout of the following Wrover model

I've recently acquired the following ESP32: https://i.postimg.cc/K8WqjF9S/20190405-135731.jpg It is a ESP32 Wrover-B DevKitV4, right ? I can't find any documentation about it. The only documentation that I could find about a Wrover module is this: https://www.espressif.com/sites/default/files/docume...

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