B4R Tutorials

Erel · Oct 27, 2016

B4R v1.50 includes a new type named B4RSerializator (in rRandomAccessFile library).
B4RSerializator solves a difficult and common task. Sending messages with multiple fields to other platforms...

Erel · Apr 12, 2016

As in the other B4X tools you can embed C or C++ code in the project.

Example:

B4X:

Sub Process_Globals
   Public Serial1 As Serial
   Private Result, N1, N2 As Int 'ignore
End Sub

Private Sub...

Laurent95 · Sep 30, 2019

Hello,

Since a while i searched to do the same thing i did on an ESP01, but with B4R.
I did it 1st time in Arduino IDE , see the video at bottom, that works well

I searched long time to...

hatzisn · Sep 22, 2019

Hi everyone,

Watching tutorials on YouTube I came across this application which allows you to check blue tooth communications. I suppose it will be handy to all of you...

hatzisn · Aug 19, 2019

Hi everyone,

Last night I found this guy who explains everything simply and very detailed. Here he explains how to load our Arduino sketch directly (or indirectly) in an ATMega328P-PU...

hatzisn · Aug 17, 2019

Hi everyone,

This project is a parking detector. It is not my idea and it exists already in Stavros Niarchos Foundation Parking already materialized but it has been a great pleasure analyzing it...

hatzisn · Aug 15, 2019

Hi everybody,

I found this application on Play Store and it is very useful for prototyping using components...

Mostez · Aug 1, 2019

this is a very simple example shows how to drive 4-digits 7-segment display with MAX7219 and rLedControl library, this code example displays 'HoLA' word, you can add more digits and MAX7219...

hatzisn · Jul 20, 2019

Hi everyone,

Yesterday I watched a video and I would like to share the knowledge accomplished with you. Do you know Billy Brown? Well "Billy Brown Revives On Your Gin But Values Good Whiskey...

hatzisn · Jul 19, 2019

This is a very detailed analysis on circuit analysis comprising of two videos. They are huge videos (1,5 hours almost each) but believe me it worth it seeing them. I faced all these subjects in...

Tayfur · Jul 2, 2019

Do you have more good solitions; Please share it on my article.
thanks sharings.

B4X:

'    ----XOR-------
'    A B Output
'    -----------
'    0 0    0
'    0 1    1
'    1 0    1
'    1 1    0...

Johan Schoeman · Jun 21, 2019

This B4R project uses the SevSeg library via inline C to display characters on a 4 digit x 7 segment LED display (I am using a SMA420364L) - hard wired.

The inline C code via the...

Johan Schoeman · Jun 15, 2019

This is a sample project for the IR control of the DSTV Explora Model 2A decoder (Digital Satellite TV). The hex codes comes from the B4A project that I have posted here. The B4A...

Johan Schoeman · Jun 8, 2019

The attached project comes from here. Used Inline C to create and display the big/large alphanumeric characters.

I am sure you will figure out how to make use of it (i.e calling and...

Johan Schoeman · Jun 1, 2019

The attached project mimics this posting. Have added the basic functionality with inline C. It uses the rCore and rLiquidCrystal libraries.

Wiring diagram:

Result...

Johan Schoeman · May 18, 2019

A digital clock and alarm without making use of a RTC. It uses:
Uno R3
LCD 1602 (to display the clock and the alarm)
Piezo Buzzer (to sound the preset alarm)
10K Pot (adjust the contrast of the...

Johan Schoeman · May 11, 2019

It is based on this Arduino project with the following wiring diagram:

It uses the 788BS 8x8 LED matrix (red) to display numbers/characters/other stuff (without making...

KMatle · Mar 30, 2019

Here's nother example how to use RSA on a ESP32 based on this documentation:

https://tls.mbed.org/kb/how-to/encrypt-and-decrypt-with-rsa

Notes:

- If the filesystem does not work, you need...

KMatle · Mar 28, 2019

This is about how to exchange AES256 encrypted messages incl. generated IV (initialization vector) between a ESP32 and B4x.

Notes:

- the ESP uses AES/CBC/NoPadding. The data must be padded (must...

KMatle · Mar 24, 2019

Finally I got it working. Maybe the Inline C code is not that elegant I was too lazy to add a Salt (which I will update later). Hardest part (for me as I don't like C since the 90ies) was to...

B4R Tutorials

Show only:

[B4X] B4RSerializator - Send and receive objects instead of bytes

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Inline C / C++

How to get and parse Json from an Http server, inline C code

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Check blue tooth communication of your creations

Shrink your arduino project to the minimum

Car parking position detector

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Electronic components pinouts application

MAX7219 7-Segment Driver

Resistance color specs reading - Billy Brown habits

Circuit analysis to the maximum

XOR operation for Boolean

SevSeg with inline C

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IR Control for DSTV Explora Model 2A

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Big/Large Alphanumeric Characters(LCD1602)

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LCD Bar Graph

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Digital Clock and Alarm without using a RTC

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8x8 LED Matrix with 788BS

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Using RSA on a ESP32 via Inline C

[B4x]: Exchange AES-256 encrypted messages between ESP32 and B4x

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ESP32: AES-256 with IV (CBC, PKCSNoPadding) example via Inline C

B4R Tutorials

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Privacy & Transparency

Privacy & Transparency