B4R Tutorials

Peter Simpson · Feb 20, 2017

Hello,
Not exactly a tutorial, but informative nevertheless.

This is how to map your Arduino projects to your WeMos. So for example in the blink demo, you just choose pin 2 for a WeMos instead of...

Peter Simpson · Feb 14, 2017

Understanding why you might need a pull up resistor...

Not exactly a tutorial from directly within this forum, but nevertheless I'm more than sure that this will help a few new B4R users...

Erel · Apr 12, 2016

Libraries are written in C++.
Libraries are made of a single h file and one or more cpp files. Libraries can also include other h files which will not be exposed.

All the files should be in the...

Erel · Apr 12, 2016

The EEPROM is in most cases the only persistent storage available. As a persistent storage we can use it to store data that will not be lost when the board is turned off.

The rEEPROM library...

Erel · Apr 19, 2016

Arduino C example #1:

B4X:

void setup() {
  pinMode(13, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(13, HIGH);   // turn the LED on (HIGH is the...

Beja · Jul 6, 2016

Some of us may already know how to do that

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

klaus · Jul 4, 2016

This guide is obsolete !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...

rwblinn · Nov 2, 2016

B4R & B4J experiment to monitor the state of a Reed switch connected to an ESP8266 - a NodeMCU is used. If the Reed switch state changes (triggered by a magnetic contact), data is send to a B4J...

Erel · Apr 11, 2016

A simple example that uses a Timer to change the state of pin 13 (this is the pin connected to the built-in led):

B4X:

Sub Process_Globals
   Public Serial1 As Serial
   Private Timer1 As Timer...

Erel · Oct 5, 2016

Relays are electronic switches that allow low power (voltage) devices to control high power circuits.

In this example the ESP8266 board controls a regular 220v light bulb.

*** High power...

Tayfur · Oct 7, 2016

I using this code, Because Board has a problem for records size capacity of epprom.

Sample

B4X:

Log("17:45:36 False >>",DateTime.TimeToUint(17,45,36,False)) '>>> 1065
    Log("1065 // 17:45:36...

Tayfur · Oct 7, 2016

I using this code, Because Board has a problem for records size capacity of epprom.

B4X:

'For date >> 2015/ 08 / 04 (y/m/d)
Log("Date number:",DateTime.DateToUint(15,8,4)))
'returned >>
'Date...

Erel · Sep 19, 2016

The smaller Arduinos like the Arduino Uno have 2k of RAM. The subs stack and the global variables use this memory.

If your program includes constant data then you can use PROGMEM to store the...

inakigarm · Apr 13, 2016

Testing the HC-SR04 to measuring distances

The accuraccy of the sensor depends greatly on...

Tayfur · Sep 2, 2016

Hello;
I needed date time functions; And some write codes.
it is first sharing with B4R

use this variables for date &time
Public Time_HH As Int
Public Time_MM As Int
...

Erel · Sep 5, 2016

The Arduino 101 is an Arduino board developed by Intel. It is mostly compatible with standard...

inakigarm · Apr 20, 2016

Thanks to @Erel and the new rservo library (Beta#7), we've access to servo motors.

Servos are a motor type that allows for precise control of angular or linear position, velocity and...

derez · Apr 17, 2016

With big help from Erel here are two examples of connecting two boards by the I2C/TWI (A4 and A5 pins), using the rWire library.
Inertial Measurements (mpu6050) :

B4X:

' MPU 6050 board - Inertial...

derez · Apr 15, 2016

Edit: see post #5 for an updated version.

This application is controlling a stepper motor which can be turned by a wanted angle and speed. I use this motor...

Erel · Apr 11, 2016

Memory is a big issue in Arduino.

1. The available RAM is very small compared to other platforms. For example the Uno has 2k of RAM.
2. There is no sophisticated heap management which means that...

B4R Tutorials

Show only:

Arduino to WeMos pin mapping

Pull up resistors and buttons

Creating libraries for B4R

Attachments

Writing and reading from the EEPROM

Timers, Loopers and CallSubPlus

[Hint] 10 methods to easily destroy your Arduino

B4R Beginner's Guide

Reed Switch Monitor Example

Blink Example

ESP8266 + Relay = Let there be light

Attachments

TIME to Uint / Unit to TIME Converter

DATE to Uint / Unit to Date Converter

Using PROGMEM to save memory

Ultrasonic Ranging module HC-SR04

sub for Date Time adding

Intel Arduino 101

Attachments

Servo motor and Arduino

Inertial Measurements (MPU 6050) and Magnetometer (HMC5883L)

Stepper motor

Memory, Variables and Objects

B4R Tutorials

Attachments

Attachments

Attachments

Privacy & Transparency

Privacy & Transparency