B4R Tutorials

An example of connecting an ESP8266 (NodeMCU used for this experiment) and an Arduino MEGA.
The Arduino runs B4R and the ESP8266 runs ESP8266 Basic.
Note 1: Using ESP8266 Basic is for the...

 

An example of a DHT11 sensor connected to an Arduino interacting with B4J server application.

• A B4R program gathers every 10s sensor data and sends the data in JSON format via UDP to a B4J...

 

Some boards like Arduino Mega and Arduino Due have several hardware serial ports. These ports are very useful if you need to interact with multiple modules. The alternative for multiple hardware...

 

Hi,

as an example build a B4R & B4J solution to display DHT11 sensor data (Temperature & Humidity) in a google line chart created and refreshed by a B4J webserver.

Update 2016.05.24
There...

 

Hi,

please find a B4R & B4J HowTo Project: DHT11 Sensor Data send via RF24 Client to RF24 Gateway which routes to a Webserver displaying the Data in Google Chart

B4R RF24 Client

• ...

 

Hi,

this is an example of using the Real Time Clock DS1302 (from sunfounder).
There are two versions:
1. Manual: Set the time manual befor uploading. After uploading the time is...

 

In this example the Arduino board acts as a server. Clients can list the available files and can download files stored on the SD card, which is part of the Ethernet shield...

 

Hi,

a Mini Weather Station experiment displaying on a 16x2 LCD the Temperature + Humidity (Line1) and Pressure + Altitude (Line2).
In addition, a trendindicator (=,+,-) is shown for each...

 

Hi,

LCD Char Maker Tool.

Functionality

• Create custom LCD character with 5 pixel horizontal (cols), 8 pixel vertical (rows).
  Each row is represented by a byte with 5...

 

Hi,

an experiment to move a Little Crane arm (used some Lego parts) up and down via IR Remote Control (Key1=UP,Key2=DOWN). When the arm moves, the Red LED lights else the Green LED is...

 

Hi Guys

EREL is a very busy guy, and sometimes he prefers to give us some freedom on some emplacements for our Posts.

Since the advent of B4R many tutorials have been posted portraying the usage...

 

If you want more FLASH memory space (say 128K flash), need more RAM (how about 20K), would like your program to run a little faster, or simply want to play around with a different micro-controller...

 

This experiment moves a Little Crane arm (used some Lego parts) up and down via browser connected to a B4J websocket server.
When the arm moves, the Red LED is turned on else the Green LED is on...

 

Hello all
This is the same as Erel's "Button Example" modified by Klaus. All what I did is replacing the mechanical switch with a touch switch module. So simple that the images speak for...

 

Edit: A simpler and more powerful tool is available: https://www.b4x.com/android/forum/threads/esp-configurator-based-on-b4rserializator.81452/

The attached project allows the user to...

 

This guide is obsolete ! It is no more updated.
Please use the B4X Booklets.

Here you find the B4R Beginner's Guide in pdf format.

The source code for the example programs is...

 

Hi guys...

The equipment's I install all get the "current clock" from the server on first connection...
I wonder if this is possible to implement with such boards... like requesting the correct...

 

Hello all, I read a few posts asking about the power supply requirements of the Bluetooth module. I thought I can put this hint so people can use the right voltage or power supply.
The HC-x comes...

 

Some of us may already know how to do that

http://www.rugged-circuits.com/10-ways-to-destroy-an-arduino/

 

B4R v1.20 added support for ESP8266 modules. ESP8266 is a great module for IoT solutions. For a few dollars you get a powerful microcontroller with built-in support for wifi.

I recommend to...