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Welcome to B4X forum!
B4X is a set of simple and powerful cross platform RAD tools:
B4A
(free) - Android development
B4J
(free) - Desktop and Server development
B4i
- iOS development
B4R
(free) - Arduino, ESP8266 and ESP32 development
All developers, with any skill level, are welcome to
join the B4X community
.
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zed
replied to the thread
Android Question
okHttp Headers question
.
HTTP error code 415 almost always indicates a Content-Type problem, not an authentication issue. In your code, you're using...
Mar 8, 2026
T
thetrueman
reacted to
XorAndOr's post
in the thread
B4R Tutorial
Home Control 4
with
Like
.
Hi everyone, for my home automation I updated the desktop app pc windows and Tablet Android 10" to use the ESP8266 and the 4 relays...
Mar 8, 2026
knutf
reacted to
Erel's post
in the thread
Android Code Snippet
[B4X] Throw errors / exceptions
with
Like
.
Cross platform code to raise exceptions. Mostly Useful for libraries development. Private Sub ThrowError(Message As String)...
Mar 8, 2026
peacemaker
reacted to
zed's post
in the thread
B4R Question
CallSubPlus(variableString....) Not possible at all?
with
Wow
.
You cannot pass a subroutine name as a variable in B4R, because the compiler converts all non-constant strings to fixed values at...
Mar 8, 2026
peacemaker
reacted to
Cableguy's post
in the thread
B4R Question
CallSubPlus(variableString....) Not possible at all?
with
100%
.
B4R was created when Arduino was in fact very "resources challenged" but now, with ESP32 having up to 4Mb Ram, and clock frequencies...
Mar 8, 2026
peacemaker
reacted to
Erel's post
in the thread
Android Code Snippet
[B4X] Throw errors / exceptions
with
Like
.
Cross platform code to raise exceptions. Mostly Useful for libraries development. Private Sub ThrowError(Message As String)...
Mar 8, 2026
zed
reacted to
fgh3966's post
in the thread
French
application pour autre plateforme ( question modifiée )
with
Like
.
Merci de ta réponse ZED, j'ai écris un premier post sur ce forum en mentionant le "STM32 '' car je pensais que ce type de MCU pouvait...
Mar 8, 2026
timwil
posted the thread
Android Question
okHttp Headers question
in
Android Questions
.
I am using b4a version 13.00 with OkHttp version 1.50 trying to send an encrypted JSON payload...
Mar 8, 2026
Cableguy
replied to the thread
B4R Library
rESP32Servo
.
Got it working... seems you NEED to install the original lib through Arduino IDE
Mar 8, 2026
Daestrum
replied to the thread
Fun project I am working on
.
OK, added a few tweaks here and there, does much more than I planned at first. java("*** some java code ***")...
Mar 8, 2026
Cableguy
replied to the thread
B4R Library
rESP32Servo
.
Hi @rwblinn , I am trying to use your lib with a ESP32 Dev Module but getting the following error: B4R Version: 4.00 Parsing code...
Mar 8, 2026
XorAndOr
replied to the thread
B4R Tutorial
Home Control 4
.
Hi everyone, for my home automation I updated the desktop app pc windows and Tablet Android 10" to use the ESP8266 and the 4 relays...
Mar 8, 2026
LucaMs
reacted to
Erel's post
in the thread
Android Code Snippet
[B4X] Throw errors / exceptions
with
Like
.
Cross platform code to raise exceptions. Mostly Useful for libraries development. Private Sub ThrowError(Message As String)...
Mar 8, 2026
b4x-de
reacted to
Erel's post
in the thread
Android Code Snippet
[B4X] Throw errors / exceptions
with
Like
.
Cross platform code to raise exceptions. Mostly Useful for libraries development. Private Sub ThrowError(Message As String)...
Mar 8, 2026
Claudio Oliveira
reacted to
Erel's post
in the thread
Android Code Snippet
[B4X] Throw errors / exceptions
with
Like
.
Cross platform code to raise exceptions. Mostly Useful for libraries development. Private Sub ThrowError(Message As String)...
Mar 8, 2026
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