B4R by B4A

[Marc DANIEL]

Some time ago, a B4X user asked me this question: "Do you know any two-line displays that can be controlled via Bluetooth or WiFi?" I answered: "probably" and had fun proving it here. Of course this project could be improved by using your Smartphones keyboard with the use of the B4A "IME" library

Video

Download the B4A file Download the APK file

Of course, these applications can be used for a 4 line by 20 character LCD display, just modify the B4R application​

 

[Marc DANIEL]

Screenshots of the B4A app​

 

[Marc DANIEL]

And I had fun adding a small keyboard to write on the LCD screen, the typed characters are transmitted via their ASCII codes to the B4R application, this gives a new completed B4A application and a new B4R application. The eraser still works as well as the test button.

Download the B4A files

Download the APK file

Download the B4R file
​

 

[Marc DANIEL]

You can connect 2 LCD screens to an Arduino UNO board

​

But they will display exactly the same texts. If you display a text intended for a screen of 4 lines of 20 characters, only the first 16 characters of the first two lines will be displayed on a screen of 2 lines of 16 characters

 

[Marc DANIEL]

And finally, I had fun adding two buttons to select the LCD screen used and a button to launch a scrolling text. All I need now is to receive the new 20x04 LCD screen with integrated I2C interface to make a video that I will come back to place here!

news buttons

Download the B4A files

Download the APK file

Download the B4R file​

 

[Marc DANIEL]

Hello everyone, I received my 4-line, 20-character LCD screen that I was missing.
So here is on the one hand the promised video and also the new files updated after fixing some bugs to be downloaded

B4A files

APK file

B4R file

VIDEO​

 

[thetrueman]

Very nice and thanks so much to share the codes for the curious ones. We are looking for more. Thanks.

 

[Marc DANIEL]

Klaus, thank you for your help with the substring tool

 

[f0raster0]

a bit off-topic , but I love your blog, amazing! and the Citroën 2CV, my dad had one of those!

 

[Marc DANIEL]

My little brother (who was also my student) has just renovated a Citroën 2 CV in the colors of the French flag

But here we are completely off topic! Sorry