B4R Tutorials

Here is this RGB Led Strip light project I have been playing around with.

I am including the Android program I use to play with colors.

NOTE when using the Android program you can select a theme...

 

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...

 

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

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

 

This is by 99% a tutorial and by 1% a question. The file in the link contains some notes for me I devised from a lot of tutorials on how to burn a bootloader to a ATMEGA328P-PU wired on a...

 

This is not a tutorial for B4R. I think a glossary of terms might be useful for beginners to electronics and B4R. So I created my own list in GitHub to record the terms that I find need...

 

Some of us may already know how to do that

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

 

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) :

' MPU 6050 board - Inertial...

 

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...

 

Edit: use rHttpUtils2 instead: https://www.b4x.com/android/forum/threads/module-rhttputils2-http-client.74785/#content
As a general rule, I recommend to use Raspberry Pi with B4J to...

 

Attached is a B4R project (using inline C) to manipulate the ports of the Controllino Mega. In this project we do the following:
1. Toggle the OVL (over voltage) LED of the PLC between on/off...

 

I took Erel's BLE example and added (as on the ESP32 side) AES256 encryption. For some reasons I wasn't able to use SPIFFS and/or WiFi parallel to BLE on the ESP32 side. Maybe you find a...

 

Not exactly a tutorial, but still education for those not in the know...

 

It is based on this posting. I am using an Arduino Nano to control the 12 LEDs using pins 8, 9, 10, and 11 of the Nano. Just thought it would be interesting to give...

 

I need to create a large string for http call. Using joinStrings if string variable is more than ~ 100 characters it crashes. I saw that an alternative is to use astream but how am i going to...

 

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...

 

As the title says, a standard WiFi-QRCode ist displayed on a tft screen. This can be scanned by any modern phone to automatically and it connects to the ESP, so you don't need to type any...

 

B4x Object Browser will soon support B4R and is free.

https://www.b4x.com/android/forum/t...r-api-documentation-b4x-object-browser.25682/

 

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...

 

Hello All,
Here I will show, how to parse the Latitude and Longitude from raw nmea data.
I am using gps module, Arduino Uno and additional softwareSerial.

Sub Process_Globals
    Public Serial1...

 

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...