B4R Tutorials

 

This example shows how to send http requests with a GSM shield. I've tested it on a shield with SIM900 module. This can be very interesting for outdoor IoT solutions where there is no local...

 

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...

 

Here is some code to demonstrate using a single stepper motor, an Uno, the Adafruit Motor Shield and a three-way switch. The middle position of the switch is OFF. One side rotates the motor until...

 

This is not really a tutorial, just a small piece of information regarding the microstepping.

With respect to the library from Erel...

 

This is a small B4J program that uses jSerial library to connect to an Arduino board.

To see it working start with this...

 

I use inline C in my B4R projects quite a bit in my projects. Mostly I have some C/C++ code I want to call from B4R subs - that's well documented on the forum (the Inline C intro here)...

 

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 ...

 

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:...

 

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 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:

 

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

 

In this example we will connect an Android...

 

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...

 

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*...

 

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...

 

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...

 

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...

 

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...

 

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...