B4R Tutorials

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

 

Hi guys
I want to share my project on this great community (source code free no donation)
I think it may be useful to someone
in the source code I commented out the functions
it should be simple...

 

In this example we will connect an Android...

 

The GSM shield allows the Arduino to connect to cellular networks. This opens the door for many interesting outdoor...

 

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...

 

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...

 

I saw a post or two about how to get the local date & time with no easy answers. I need this myself for my first Arduino project so I had a look around and found a free API that does just this...

 

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...

 

For those who enjoy making their own 8 Relays, DS18b20, Buzzer, Display, LDR Sensor,

 

Looking in the tutorial section of B4R I noticed that there was no example of how to connect and use the joystick module. So here is an example

Joystick Module MH / pin

 green : GND
   Red ...

 

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...

 

Maybe useful for somebody. It's not my tutorial!

 

To complete the B4X FTP season (https://www.b4x.com/android/forum/threads/74320/#content) I've written a client in B4R.

It allows to connect to a FTP server and download or upload files...

 

Edit: A simpler and more powerful tool is available: https://www.b4x.com/android/forum/threads/esp-configurator-based-on-b4rserializator.81452/

The attached project allows the user to...

 

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...

 

This is an example of how UDP can be used to broadcast the current temperature and pressure to one or more clients.

The nice thing about it is that there is no server involved. The ESP8266 just...

 

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...

 

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...

 

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...

 

This example downloads a file from a server folder (here I use a folder in htdocs on my apache server) and saves it to a file on the file system. Tested with 700KB files. Set headers (browse the...