Search found 483 matches

by mikemoy
Wed Feb 19, 2020 4:25 pm
Forum: Hardware
Topic: [solved] Reset: is a 10K resistor required ?
Replies: 8
Views: 2062

Re: Reset: is a 10K resistor required ?

By the way, do I have to maintain RESET engaged all along the flashing process, or just at the begining ??
If its held in reset, how could you flash it?

https://github.com/espressif/esptool/wi ... -Selection
by mikemoy
Tue Feb 18, 2020 9:27 pm
Forum: Hardware
Topic: Custom ESP32 Board Programming
Replies: 1
Views: 969

Re: Custom ESP32 Board Programming

hold the relevant boot strapping pins up
Lets be clear, what pins are you talking about.
by mikemoy
Tue Feb 18, 2020 2:36 pm
Forum: Hardware
Topic: Pico D4 with a Lipo battery
Replies: 2
Views: 1096

Re: Pico D4 with a Lipo battery

You can't simply just slap a LiPo batter to the input of any regulator, and expect it to work. There is a thing called dropout voltage for regulators. For example, some regulators need to be fed 1.2v above the voltage you want it to regulate at. You need to look at the data sheet for that regulator ...
by mikemoy
Sat Feb 15, 2020 5:40 pm
Forum: ESP32 Arduino
Topic: SAMPLING AUDIO - How to handle large data?
Replies: 6
Views: 2425

Re: SAMPLING AUDIO - How to handle large data?

I have never needed to write to a file that quickly so I dont know if it can ,or there is something going on with your code.
But the point here is that you can slow down your writes while you are still saving the data to ram.
by mikemoy
Sat Feb 15, 2020 7:09 am
Forum: ESP32 Arduino
Topic: SAMPLING AUDIO - How to handle large data?
Replies: 6
Views: 2425

Re: SAMPLING AUDIO - How to handle large data?

You throw your samples into a ram variable array. Then you have a back end task that is reading those samples and saving it to SPIFF filesystem. Basically create 2 variable. The one to hold your samples, and one to store how many samples you have. uint8_t samples[21000]; uint16_t sample_counter=0; A...
by mikemoy
Tue Feb 11, 2020 2:07 pm
Forum: Showcase
Topic: New ESP32-WROVER Ethernet Board
Replies: 34
Views: 42553

Re: New ESP32-WROVER Ethernet Board

Here ya go
ESP32-WROVER POE v0.6a.PDF
Skiz
(37.71 KiB) Downloaded 270 times
by mikemoy
Mon Feb 10, 2020 7:40 pm
Forum: Hardware
Topic: ESP32-DevKitC V4 schematics help
Replies: 2
Views: 1421

Re: ESP32-DevKitC V4 schematics help

I think your getting to far ahead of yourself. You need to do more reading than plowing into making a PCB. 1. Connected to 3.3v on ESP-WROOM-32 are 2 capacitors: 0.1uF, 22uF. What are their parts? I also have a AMS1117-3.3 beside the esp that is connected at output to 22uF. Does this make the first ...
by mikemoy
Mon Feb 10, 2020 7:31 pm
Forum: ESP-IDF
Topic: QUAD SPI Slave Sender/Receiver
Replies: 2
Views: 669

Re: QUAD SPI Slave Sender/Receiver

Just a super fast look, i noticed that in your Slave Sender you have

char sendbuf[128] = {0};

then

t.length=128*2;
by mikemoy
Thu Feb 06, 2020 11:10 pm
Forum: Hardware
Topic: ESP32 5Volt GPIO Outputs
Replies: 2
Views: 1497

Re: ESP32 5Volt GPIO Outputs

Give this a shot. Pretty much any NPN & PNP transistor should work.

Annotation 2020-02-06 170926.jpg
Annotation 2020-02-06 170926.jpg (238.57 KiB) Viewed 1347 times
by mikemoy
Thu Jan 30, 2020 7:52 pm
Forum: Hardware
Topic: How to flash a WROOM module using an FTDI programmer?
Replies: 8
Views: 2511

Re: How to flash a WROOM module using an FTDI programmer?

Same thing here is the screen shot. You can just drag your .jpg file into the post, then click place inline. That works for me.


Annotation 2020-01-30 135128.jpg
Annotation 2020-01-30 135128.jpg (36.7 KiB) Viewed 2386 times

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