arduino

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Hello everyone. Does anyone know how you could put an ESP8266 to receive audiostreamer over wifi from the example of the walkie talkie b4a, that is, put it only as a receiver. LINK https://www.b4x.com/android/forum/threads/walkie-talkie-audio-streaming-over-wifi-or-bluetooth.30648/ My need...

B4A app to control inputs and outputs of Arduino connected to Bluetooth module HC-05. Arduino sends 9 bytes, first byte=129 to mark the start and then 8 bytes 7 bits each of data. B4A sends 2 bytes. Update is every second. HC-05 is set to 9600 Baud rate.

Hola y M. Buenos días para todos. Me llamo Humberto soy de Argentina, Entre Ríos, Gualeguaychú. Quería aprovechar esta consulta para presentarme y aprender a usar este sitio (además del Foro de consulta). Vengo de usar Android Studio y por accidente me topé con B4a el que comencé a mirar al...

Hi, im using a ESP32 Bluetooth to send a number. i use bluetooth serial in esp32 arduino to send number. I can received this number in serial bluetooth terminal app in my phone. I need just receive and show this number in android phone. Time between send number is minimum 2 seconds but its...

Moved to the B4R Questions

I am having trouble connecting to a COM Port with the code below. The point is to read data coming from an Arduino. The code works fine on my friends computer but not on mine. Can someone give me a hint where I can look? PC is running Windows 10, 64 Bit. The Arduino IDE is open but the Serial...

I'm from Germany and there are electricity meters there where you can query the consumption figures. To do this, you have to light up a diode and thereby enter the code so that you can access the device. I wanted to trigger this "blinking" via APP. So I press a button and the LED (of the...

I've been banging my head all day to get it to work. The animation is from 3 bitmaps switched periodically. The code uses wire lib. Screen is 128x64, i2c, 1306 driver. The code is for Arduino Uno or Nano. To convert image to code: On a PC (MS Paint) save image as monochrom bmp. Download LCD...

Display text on TFT screen sent from PC. Arduino is Nano or Uno. TFT screen is 1.8" driver ST7735. Connected to PC via USB. Color and size are selectable. ' TFT module with ST7735 driver ' 1 LED 3.3 V or 5V via 47 ohm ' 2 SCK 13 ' 3 SDA 11 ' 4 A0 Or DC 9 ' 5 RESET 8 ' 6...

Hi there, I spent a while searching the forum but didn't find hints targeting my question: I want the Mega to boot from a hex-file from the SD card. While it is obviously possible to transfer a compiled sketch to the Arduino Mega via an Ethernet connection, what is necessary to reset the board...

Seed - Wio Terminal I think these small devices are very interesting that allow you to have an integrated cpu with a display and an I / O connector Has anyone tried programming them using B4X environments?

Hi, I have a Tablet connected to an arduino that is sending to the tablet data (one value) 50 times per second. I have to show that data in the tablet, and it has to look like the red part in the image below. Now, the question is, how can I “add” new point to the left, erase first point of the...

Hi. I was excited when I found an Arduino board featuring WiFi without external shells. I used the ESP8266 before, and worked, but I (erroneously) supposed that this one would be easier. I have included the libraries needed for using the WiFi (SPI.h and WiFiNINA.h), but the B4R says that cannot...

Greetings! Summary I would like to have an android interface to send commands to the ESP32 wifi module. For this purpose, I would need to make the board be connected to the Wifi desired by the user, secondly retrieve the IP assigned in the network and finally send commands by the Android...

Hi there, Im using UsbSerial lib 2.3 to connect to an arduino, it works perfect BUT only if the arduino is the ONLY device connected to the USB to my Android TV BOX If I have an USB mouse connected, the program doesn't find the arduino. I can connect the arduino, run the soft, connect, and...

Hi I’m trying to send data from the Arduino to mobile app and I’m getting a wired result and I’m unsure why I will try and send HelloWord from the Arduino and it comes out on the B4A Log as the following >H >elloWorld I have added the code I’m using below I got the code from the demo...

For the ESP8266 watchdog, can be very simple to use. #Region Project Attributes #AutoFlushLogs: True #CheckArrayBounds: True #StackBufferSize: 300 #End Region Sub Process_Globals 'These global variables will be declared once when the application starts. 'Public variables can...

Hello, I installed the B4R and noticed that there is no Designer, how are TFT screens made? I have found a project that is starting, and it promises to be very useful, maybe you can talk and join forces to make both projects better. [A lightweight GUI framework for embedded displays]...