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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
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B4R - Arduino, ESP8266 and ESP32
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B4R Questions
Libraries developers questions
Threads
52
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294
Messages
294
C
C/C++ Question
ArrayObject* B4RLIB::Function() : how to make this return working ?
Apr 24, 2025
candide
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CallSubPlus(variableString....) Not possible at all?
Cableguy
Mar 7, 2026
Answers
9
Views
644
Mar 8, 2026
zed
B
Async MQTT client?
BertI
Mar 7, 2026
Answers
0
Views
171
Mar 7, 2026
BertI
B
[SOLVED] comming back to B4R and having issues compiling
Cableguy
Mar 3, 2026
Answers
1
Views
277
Mar 3, 2026
Cableguy
MQTT port 1883 blocked on mobile networks (4G/)? Is this expected and what is the best workaround?
Cesar_Morisco
Feb 22, 2026
Answers
7
Views
627
Feb 25, 2026
Cesar_Morisco
B4R frequency meter (ESP8266)
peacemaker
Apr 14, 2022
Answers
4
Views
3K
Feb 18, 2026
peacemaker
ArduinoBLE lib wrapping EMPTY issue
rwblinn
Jan 13, 2026
Answers
4
Views
828
Jan 19, 2026
Peter Simpson
D
Graphing on Nextion from Arduino
davetech
Jan 5, 2026
Answers
4
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722
Jan 7, 2026
davetech
D
Arduino Uno Q - First Look - AppLab
hatzisn
Dec 26, 2025
Answers
5
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789
Dec 30, 2025
hatzisn
From BLE to WiFi connection
Filippo
Dec 18, 2025
Answers
3
Views
1K
Dec 19, 2025
hatzisn
M
rArduino_JSON, Get number of elements in array
Mostez
Dec 14, 2025
Answers
6
Views
792
Dec 15, 2025
Mostez
M
M
Problem whit mqtt
Mania
Dec 13, 2025
Answers
4
Views
678
Dec 14, 2025
Mania
M
Problem : connecting and selecting a board
rabbitBUSH
Dec 4, 2025
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5
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758
Dec 5, 2025
rabbitBUSH
B
ESP32 Bluetooth
Brian Dean
Nov 24, 2025
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6
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1K
Dec 4, 2025
rabbitBUSH
[Solved] Any way to connect rf24-nrf24l01-radio-modules to one module?
Beja
Dec 4, 2025
Answers
2
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645
Dec 4, 2025
Beja
R
Solved
transferring large files from B4A to B4R
RJB
Oct 21, 2025
Answers
10
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1K
Nov 9, 2025
embedded
E
LoRaWAN radioa transmission (Wio-SX1262)
peacemaker
Nov 8, 2025
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0
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357
Nov 8, 2025
peacemaker
A
RPI Pico 2W , Wifi connect
alpan
Nov 1, 2025
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2
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582
Nov 2, 2025
alpan
A
p10 led panel library
tango
Jan 21, 2017
2
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27
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6K
Nov 1, 2025
candide
C
T
Solved
Serial Text Data to String Variable
thetrueman
Oct 23, 2025
Answers
3
Views
812
Oct 26, 2025
thetrueman
T
0
rEthernet - W5500 - how to check if the client has connected to the server?
0slawek
Oct 24, 2025
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1
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527
Oct 25, 2025
candide
C
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