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by krzychb
Thu Nov 23, 2017 7:51 pm
Forum: General Discussion
Topic: Mysterious voltage drop when ESP32 board is connected
Replies: 10
Views: 97

Re: MYSTERIOUS VOLTAGE DROP WHEN ESP32 BOARD IS CONNECTED

Depending on particular producer of 7805 regulator, the maximum DC input voltage is either 25 or 35V - http://www.ti.com/lit/ds/symlink/lm340.pdf

Therefore you can connect 12V directly to the "In" of 7805 shown on your schematic
by krzychb
Thu Nov 23, 2017 6:30 pm
Forum: General Discussion
Topic: Mysterious voltage drop when ESP32 board is connected
Replies: 10
Views: 97

Re: MYSTERIOUS VOLTAGE DROP WHEN ESP32 BOARD IS CONNECTED

Hi Albert ,
Check https://www.youtube.com/watch?v=XxLKfAZrhbM
This is among my favourite from Afrotechmods :D
For this particular issue the explanation is at 2:08
by krzychb
Tue Oct 31, 2017 7:48 pm
Forum: ESP32 SDK
Topic: error message ledc_isr_register()
Replies: 8
Views: 199

Re: error message ledc_isr_register()

Hello zilizii,

abcdcadb wrote:I got too many interrupt, I would like to get only 1 when the fade itself ended.

What do you mean? Do you see any interrupts triggered?

If you do not see any interrupts triggered, do you check the value returned by 'ledc_isr_register()'?
What is the value?
by krzychb
Tue Oct 31, 2017 3:47 pm
Forum: ESP32 Arduino
Topic: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?
Replies: 28
Views: 5726

Re: ESP32 ADC Non-linear Issues - How do I fix / change Attenuation or width?

So just to be clear this will have to be done for every single chip used? If so that seems very inefficient, especially if trying to use this on a mass scale. Is this going to be fixed in the hardware in the future or is this the best there is, manually reading the output voltage each time and putt...
by krzychb
Wed Oct 11, 2017 11:32 am
Forum: ESP32 Arduino
Topic: Differences between GPIO pins
Replies: 3
Views: 294

Re: Differences between GPIO pins

The low level details for all the pins / pin groups are covered in "Appendix A" of the ESP32 Datasheet . In your case I would check: 1. A.1. Notes on ESP32 Pin Lists 2. A.4. IO_MUX" Seeing different behavior between seemingly identical pins (according to the datasheet), I would first ...
by krzychb
Wed Oct 11, 2017 8:39 am
Forum: ESP32 Arduino
Topic: Differences between GPIO pins
Replies: 3
Views: 294

Re: Differences between GPIO pins

riklaunim wrote:Are there any other differences or limitations of other GPIO pins?


Hi riklaunim,

A good top level overview is provided in section "Peripherals and I/O" of https://learn.sparkfun.com/tutorials/es ... okup-guide.
by krzychb
Tue Oct 10, 2017 11:38 am
Forum: General Discussion
Topic: Driver for the LNA in ESP32
Replies: 1
Views: 137

Re: Driver for the LNA in ESP32

Hi ritimukta,

The status is as for https://github.com/espressif/esp-idf/issues/814
by krzychb
Fri Oct 06, 2017 5:31 am
Forum: General Discussion
Topic: How is the ULP coprocessor going to be programmed?
Replies: 16
Views: 3685

Re: How is the ULP coprocessor going to be programmed?

I see before, and dont understand write(reg) There are several instances of using "WRITE_RTC_REG" in https://github.com/krzychb/ulp-loop/blob/6f7c3d843e8a27137d77fd2f28c04c16919e5681/main/ulp/loop_blink.S. Which one would you like to be clarified? Or you do not understand description in m...
by krzychb
Thu Oct 05, 2017 8:56 pm
Forum: General Discussion
Topic: How is the ULP coprocessor going to be programmed?
Replies: 16
Views: 3685

Re: How is the ULP coprocessor going to be programmed?

urbanze wrote: Just toggle on/off a pin...


Check https://github.com/krzychb/ulp-loop.
by krzychb
Thu Oct 05, 2017 8:49 pm
Forum: General Discussion
Topic: ULP global variables
Replies: 45
Views: 1483

Re: ULP global variables

Hi urbanze, I am happy to see that you have answered most of the questions already! 2-) The assembly code only worked with .bss and .text (removing them, not working). What they do? Why and when should I put them? I did not see them saying anything about them. If there really is not and that is why ...

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