B4R Tutorials

SD cards

The rSD library allows reading and writing to SD cards. The Ethernet shield as well as other shields include a SD slot.

The steps required to work with files:
1. Initialize a SD object. You need...
 

Attachments

  • B4J_PrepareCurrencyFile.zip
    2.8 KB · Views: 1,490
  • SD_Example.zip
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[Tool]LCD Display Designer

Tool to design LCD Display Layouts for 20x4 or 16x2 displays connected to Arduino, Raspberry Pi or other.


Screenshot application with generated B4R code and an Arduino UNO with...
 

Attachments

  • rLiquidCrystal_I2C-110.zip
    23.3 KB · Views: 1,103
  • lcddisplaydesigner.zip
    6.6 KB · Views: 1,078
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Arduino Simulator

Hey everybody,

Just found this and looks very impressive...

 

Glossary for Arduino Development

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...
 

ESP32: Simple OTA/Update via WebServer

This example (adapted from the Arduino examples under Arduino->File->Examples)

- downloads a file from a server (exactly: the update file)
- store this file to the filesystem (SPIFFS)
- starts an...
 

ESP Configurator based on B4RSerializator



This tool replaces the browser based solution...
 

Attachments

  • B4R_ESPConfigurator.zip
    2 KB · Views: 3,323
  • B4J_ESPConfigurator.zip
    46.1 KB · Views: 3,042
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ESP8266 - Getting Started

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...
 

Attachments

  • B4J_ConnectToESP8266.zip
    3.7 KB · Views: 3,367
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ESP32: OTP/2FA example

This example generates a OTP/2FA ("One Time Password") as you know it when you login to a website and you get a 6 digit code via sms. It changes every 30 seconds.

How it works:

- as it is time...
 

E-Paper (probably suitable for battery powered projects)

Here is a nice tutorial by the guy in DronebotWorkshop. What surprised me (and I did not know that) is that with e-paper you only have power consumption while writing to it and no more. Even if...
 
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Updated RSA Encryption between B4x and ESP32's (any other plattform will do, too)

Here's an updated example how to

- generate an RSA keypair (Public and Private key) on a ESP32 and on B4x
- export these keys in PEM format (compatible with any other plattform like B4x, .net...
 

Attachments

  • ExchangeKeysB4J.zip
    5 KB · Views: 995
  • ExchangeKeysB4R.zip
    4.4 KB · Views: 971

DroneBot Workshop - A great dissection of the new Arduino IDE

 

PS4 F1 2020 Interfacing using ESP8266

1 - INTRODUCTION

Hi Guys,

My wife's eldest son is addicted to PS4 F1 2020 game, even bought himself a Rig for a Steering Wheel and Pedals.
He works alongside with me and on one of...
 
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Full responsive ESP8266 settings WebApp with websockets

Merry Christmass everyone in the Christian community of this forum,

Yesterday I 've had a great crazy idea which turned out to be a working one too.

Normally one would answer to the question if...
 

Attachments

  • B4RWebApp.zip
    5 KB · Views: 1,101
  • B4RWebServer.zip
    2.8 KB · Views: 1,110
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SSD1306 Module

I've been working with SSD1306 OLED for long time, in some projects I was in need to add some special fonts and add some graphics or icons like blue tooth symbols. I thought to put all these...
 

Attachments

  • SSD_module.zip
    24.5 KB · Views: 1,236
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Cables AWG - Surface (mm^2) - Diameter(mm)

Good morning everyone,

I have put together this Excel file which shows the "translations" bettween AWG value of cable (american wire gauge) and european metric value of surface and diameter. I...
 

Attachments

  • Cables-AWG-Surface-Diameter.xlsx
    12.1 KB · Views: 1,125

ESP32 Mesh example

ESP32 - Fix uploading sketch error problem

Temporary solution:
After you start compiling and compiling log reachs uploading sketch stage, you should continuously press BOOT button on ESP32 board until uploading complete...
 

Check car's lights status and report

Hey everyone,

here is an implementation of a car lights checker which reports if all 4 car's lights are working properly. To find out if there is a problem with the lights (head and rear) we use...
 
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tone() function

Here is a tone function that does Arduino's tone()
The buzzer is connected between pin 6 and ground :
B4X:
Private Sub AppStart
    Serial1.Initialize(115200)
    Log("AppStart")
    Delay( 1000)...
 
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[Electronics] "Wake-up on sensor trigger" and auto power-off

Hi guys,

So B4R is so much more than simply code and breakout boards assembled/connecter by jump-wires and breadboards...
I know for a fact that most of us are not electronics pronned and thus...
 
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