ESP32 - Pushing a Varaible out to multiple GPIO pins using registers

Gareth's picture

How to output a variable directly to GPIO pins ... i.e. in parallel.

This can be done using the ESP32's registers.

// sending a variable to GPIO pins Bitwise register style

// create a parallel GPIO bus using GPIO 12,13,14,15 i.e. must be consecutive pins
#define PARALLEL_0  12

int RGBled=000; // demo RGB connected to Gpio pin 12,13,14,15

void setup() {

ESP32 - Setting up 2 cores to run 2 parallel Code threads

Gareth's picture

Here is the simplest way to get code running parallel with two separate cores on the ESP32.

Google Speech Recognizer Log Error Code

LWFlouisa's picture

I seemed to have resolved the issue, it just takes a while for Mary to load.

Finally getting used to the syntax,

LWFlouisa's picture

What was really stumbling me was mainly trying to add numbers as parts of speech, but it was easy enough to turn these back into strings, and then display it normally.

The flow is extremely similar to Ruby:



# Submission based emotions.

def attraction():

  print("I do accept.")


def trust():

  print("I do trust")


def acceptance():

  print("I do accept")


Having difficulty with the python,

LWFlouisa's picture

Specifically I'm having difficulty with certain aspects of using the Python programming language.

When I do ruby scripts I can do stuff like this:



7.times do

  num ="my_file.txt").to_i

  new_num = num + 1

  open("my_file.txt", "w") { |f|

    f.puts new_num





Difficulty installing ant,

LWFlouisa's picture

Is ant necessary, or can it work using normal command line installation? Looking at the Ant website, it doesn't seem to have Linux instructions.

Update: I think I found it, though it's not very straight forward.

Even when trying to run the java app directly I get this error:

http://Error: Could not find or load main class .home.sarah.Downloads.myrobotlab.jar

Got my page up,

LWFlouisa's picture

Sorry if it's not exactly pretty, I tried tweaking it, but I didn't realize how powerful HTML is.

Question about motors.

LWFlouisa's picture

I think I might be getting lost on what powers a servomechanism. In this context, would it need a direct power supply, like a wall plugin, or would it work with a battery?

As someone who has never worked with servo and step motors.

Also I could make this a forum topic if preferred.

This is an amazing article!

LWFlouisa's picture

Thanks to the person that recommended this:

This was able to help me refine a programming solution. It greatly simplifies (and yet paradoxically make it more granular) how to how programming emotions: I guess this is why certain emotions seem weirdly similar to each sometimes.

Wasn't sure if this should be a forum topic,

LWFlouisa's picture

Is there any particular reason the web search in something like an android would use duckduckgo, or could it be configured to use your own instance of Yacy?

I run my own local instance for places I visit.