Christian Hartinger chartinger

Comparison chips (SoCs) table for ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6

A minimal table to compare the Espressif's MCU families.

	ESP8266	ESP32	ESP32-S2	ESP32-S3	ESP32-C3	ESP32-C6
Announcement Date	2014, August	2016, September	2019, September	2020, December

ESP32 as Bluetooth Keyboard

With its built-in Bluetooth capabilities, the ESP32 can act as a Bluetooth keyboard. The below code is a minimal example of how to achieve it. It will generate the key strokes for a message whenever a button attached to the ESP32 is pressed.

For the example setup, a momentary button should be connected to pin 2 and to ground. Pin 2 will be configured as an input with pull-up.

In order to receive the message, add the ESP32 as a Bluetooth keyboard of your computer or mobile phone:

Go to your computers/phones settings
Ensure Bluetooth is turned on

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = [email protected]:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

	/*
	* ESP8266 + SSD1306 ♥ FRITZ!Box API
	*
	* Ausgabe der aktuell über die FRITZ!DECT 200 Steckdose
	* entnommenen Leistung als Prozentwert auf einem SSD1306 OLED Display.
	* Praxisbeispiel: Durch die Solaranlage eingespeiste Leistung abrufen
	* und auf dem OLED Display in Form eines Prozentwertes einblenden.
	*
	* Referenzen:
	* http://www.instructables.com/id/Wemos-D1-Mini-096-SSD1306-OLED-Display-Using-SPI/

	// A* for libgdx that is simple but optimized.

	package test;

	import com.badlogic.gdx.ApplicationAdapter;
	import com.badlogic.gdx.Gdx;
	import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
	import com.badlogic.gdx.graphics.Color;
	import com.badlogic.gdx.graphics.GL20;
	import com.badlogic.gdx.graphics.glutils.ShapeRenderer;

	# to generate your dhparam.pem file, run in the terminal
	openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048