B4R Tutorials

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...

 

This B4R example/library works with DHT11 and DHT22 temperature and humidity sensors:

This inexpensive device (DHT11) allows for measure temperature and humidity:

• Very Low cost
• 3...

 

I using this code, Because Board has a problem for records size capacity of epprom.

'For date >> 2015/ 08 / 04 (y/m/d)
Log("Date number:",DateTime.DateToUint(15,8,4)))
'returned >>
'Date...

 

The following data types are available in B4R:

Numeric types:

Byte: 0 - 255
Int (2 bytes): -32768 - 32768. Similar to Short type in other B4X tools.
UInt (2 bytes): 0 - 65535.
Long (4 bytes)...

 

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

 

Libraries are written in C++.
Libraries are made of a single h file and one or more cpp files. Libraries can also include other h files which will not be exposed.

All the files should be in the...

 

Having had my work flow cut down in the middle by vicious "circumstances" I decided to let it all go and "go fishing" as mr. Miyaghi (Karate kid) would say. So I did some things I couldn't do...

 

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...

 

Just for the fun of it. Can now control my Digital Satellite TV decoder from anywhere in my house....
Nano connected to the HC-05 module
B4A app connects to the HC-05 and sends the B4A "button...

 

This example is based on the connection diagram described here: https://www.b4x.com/android/forum/threads/rgb-leds.65998/

In this case we will control the led color with a B4J program.

The...

 

I'm new in b4r but thanks to the help of the forum i made some progress.
So i decided to share my project with all, especialy the newbies like me.
My project is a simple example on how to control...

 

In this example one of the boards acts as an access point and a server and the other board connects to the server wifi network and to the server socket.

Note that for the client to be able to...

 

The rWire supports communication with other I2C/TWI devices.

One device acts as the master and the other devices act as...

 

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

 

In the previous example we broadcasted a single byte as part of the advertising data: https://www.b4x.com/android/forum/threads/ble-hm-10-module-broadcasting-a-single-byte.65785/

In this...

 

An example of connecting an ESP8266 (NodeMCU used for this experiment) and an Arduino MEGA.
The Arduino runs B4R and the ESP8266 runs ESP8266 Basic.
Note 1: Using ESP8266 Basic is for the...

 

This is a tutorial on how to connect an actual building\house alarm PIR sensor to an Arduino and how to interpret 5 alert states (the resistance results). The advantages of using the PIR sensor in...

 

arduino-cli interface for the new B4R version can be adjusted by a configuration file, where i could setup at least the EN language - create the file "C:\Program Files\Arduino...

 

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...

 

When you buy a WeMos it doesn't come assembled with the pins soldered. You will have to solder the pins. In the following schematic and code you will find a way to check the solderings of GPIO...