B4R Tutorials

Visualizing MPU6050 Accelerometer and Gyroscope - Pitch, Roll and Yaw with inline C and Processing

• By Johan Schoeman
• Feb 29, 2020

It is based on this tutorial. Nano programmed via B4R and visualizing the data from the MPU6050 with Processing -
See this posting for basic setup

B4R code:...

 

Attachments

• mpu6050.zip

  983 bytes · Views: 633
• b4rMPU6050InlineC.b4r.zip

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Burn bootloader to ATMega328P-PU with an Arduino Uno

• By hatzisn
• Mar 23, 2020

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...

 

Last edited: Mar 23, 2020

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Shift Registers (Serial In Parallel Out - Parallel In Serial Out)

• By hatzisn
• Mar 13, 2020

This is a very useful tutorial by the guy in dronebotworkshop which opened new horizons for me since I didn't know there were two kinds of shift registers (actually four). Enjoy:

 

Last edited: Mar 13, 2020

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Custom character creation for LCD

• By hatzisn
• Mar 5, 2020

I just found this and it looks very promissing:

LCD Custom Character Generator

online character designer for Liquid Crystal Display (LCD) and create code for arduino.

maxpromer.github.io

 

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HC 05 Classic Bluetooth

• By Erel
• May 8, 2016

In this example we will connect an Android...

 

Attachments

• Adruino_Bluetooth_B4A.zip

  9.7 KB · Views: 2,879

Last edited: Apr 8, 2019

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Visualizing ADXL345 3-axis Accelerometer Pitch and Roll with inline C and Processing

• By Johan Schoeman
• Feb 15, 2020

The attached project is based on this posting:

How To Track Orientation with Arduino and ADXL345 Accelerometer

In this tutorial we will learn how to measure angle and track orientation using the Arduino and the ADXL345 Accelerometer sensor. The ADXL345 is a 3-axis...

howtomechatronics.com

Have downloaded and installed...

 

Attachments

• b4rADXL345InlineC.zip

  1.8 KB · Views: 584
• sketch_200215a.zip

  970 bytes · Views: 598

Last edited: Feb 23, 2020

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Connecting two Arduinos with rSoftwareSerial library

• By Erel
• Apr 13, 2016

With the rSoftwareSerial library you can turn regular pins to serial ports. This is useful as the hardware serial is used...

 

Attachments

• rSoftwareSerial.zip

  1.7 KB · Views: 1,546

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Strings and Bytes

• By Erel
• May 10, 2016

B4R strings are different than in other B4X tools. The reasons for these differences are:
1. Very limited memory.
2. Lack of Unicode encoders.

A String object in B4R is the same as C char*...

 

Last edited: Nov 26, 2017

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Ethernet / Network Tutorial

• By Erel
• Apr 11, 2016

This example uses an Ethernet shield to connect to a server. In this case the server is implemented with B4J, though you can easily implement a similar server with B4A or B4i.

Whenever the user...

 

Attachments

• EthernetExample.zip

  1.2 KB · Views: 1,307

Last edited: Apr 12, 2016

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Reading Date, Time, and Temperature from a DS3231 RTC module (I2C) using any 2 digital configured pins from an Arduino

• By Johan Schoeman
• Jan 19, 2020

Cracked it - can connect the DS3231 to any 2 digital pins of my Nano and read the date, time, and temperature by making use of the B4A core library only. All control of the SDA (data) and SCL...

 

Attachments

• b4rReadDS3231manually.zip

  3.2 KB · Views: 619
• datasheet.pdf

  297.8 KB · Views: 663

Last edited: Jan 23, 2020

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Setting Date and Time of a DS3231 RTC module (I2C) using any 2 digital configured pins from and Arduino

• By Johan Schoeman
• Jan 18, 2020

The attached project implements the I2C communication protocol to set the Date and Time of a DS3231 RTC module. The protocol is hard coded (i.e no library) and you can therefore use any 2 digital...

 

Attachments

• b4rWriteDS3231manually.zip

  3.5 KB · Views: 571
• datasheet.pdf

  297.8 KB · Views: 567

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Setting and Reading date and time of a DS1302 (RTC) without a library

• By Johan Schoeman
• Dec 26, 2019

I have one of the "MH-REAL-TIME CLOCK MODULES - 2" with a DS1302 chip. I thought it would be interesting to see if I could read the seconds, minutes, hours, year, month, day of month, and day of...

 

Attachments

• b4rReadDS1302manually.zip

  2.2 KB · Views: 626
• DS1302 Real Time Clock.pdf

  354.3 KB · Views: 698

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LEDStrip - different themes for different holidays

• By Robert Valentino
• Dec 31, 2019

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...

 

Attachments

• LEDStrip_B4A.zip

  496 KB · Views: 513
• LEDStrip_B4R.zip

  11.3 KB · Views: 506
• LEDStrip - Metamucil Jar.jpg

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• LEDStrip - Breadboard.jpg

  272.8 KB · Views: 540

Last edited: Jan 1, 2020

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EasyEDA - PCB Design CAD

• By hatzisn
• Dec 14, 2019

Hi everybody,

looking for free PCB design software I came accross the EasyEDA. It is one of the best I have seen since you get to design multilayered PCBs and see the designed PCB in 3d view...

 

Last edited: Dec 14, 2019

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Random Numbers from 0 to 255 (byte)

• By Johan Schoeman
• Nov 24, 2019

The attached project is based on these postings:
https://gist.github.com/bloc97/b55f684d17edd8f50df8e918cbc00f94...

 

Attachments

• b4rRandomNumber.zip

  1.3 KB · Views: 516

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Charlieplexing - controlling N*(N-1) LED's with N GPIO pins

• By Johan Schoeman
• Nov 22, 2019

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...

 

Attachments

• b4rCharliePlexing.zip

  1.1 KB · Views: 466

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Use and change font in rAdafruitGFX for TFT screen

• By derez
• Nov 8, 2019

The library rAdafruitGFX is used to draw on TFT screens. It has a default font and does not give a way to change the font for drawing text.
This is what I got when drawing very large characters...

 

Last edited: Nov 9, 2019

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B4R Vibration Sensor (shake switch)

• By inakigarm
• Oct 25, 2019

So long that I haven't played with B4R ! Today I want to test a vibration sensor (it's on a closed case yet)
The sensor signals when a sensor shake happens. It's a simple sensor (detected/not...

 

Attachments

• upload_2019-10-25_11-37-52.png

  162.9 KB · Views: 423
• upload_2019-10-25_11-38-27.png

  162.9 KB · Views: 391

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

• By 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...

 

Attachments

• B4RSerializator.bas

  4.9 KB · Views: 3,303
• B4R_Server.zip

  1.1 KB · Views: 3,283
• B4A_Client.zip

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Last edited: Apr 24, 2017

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Inline C / C++

• By 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...

 

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