B4R Tutorials

Here's nother example how to use RSA on a ESP32 based on this documentation:

https://tls.mbed.org/kb/how-to/encrypt-and-decrypt-with-rsa

Notes:

- If the filesystem does not work, you need...

 

v4.00 - September 5, 2023: https://www.b4x.com/android/forum/threads/b4r-v4-00-is-available-for-download.150115/

• This update adds support for the latest version of Arduino IDE...

 

I am working on a little thermometer project for my greenhouse using an ESP8266 and a temperature sensor. You have multiple sensors to choose from such as DHT11/22, BMP180 etc, but no...

 

 

Finally I got it working. Maybe the Inline C code is not that elegant I was too lazy to add a Salt (which I will update later). Hardest part (for me as I don't like C since the 90ies) was to...

 

Hi,

an experiment to move a Little Crane arm (used some Lego parts) up and down via IR Remote Control (Key1=UP,Key2=DOWN). When the arm moves, the Red LED lights else the Green LED is...

 

Ola

Code Module - B4r - Queue List [module]
Code Module - B4r - Stack Collection [module]
Code Module - Http - Rhttputils2 - Http Client [module]
Library - Arduino - Radafruit_mcp3008...

 

I'm new in b4r but thanks to the help of the forum i made some progress.
So i decided to share my project with all, especialy the newbies like me.
My project is a simple example on how to control...

 

It's a very small and quite powerful ESP32-board with WIFI/BLE and B4R support!

Use following board library in the Arduino-IDE in 'Settings'...

 

Temporary solution:
After you start compiling and compiling log reachs uploading sketch stage, you should continuously press BOOT button on ESP32 board until uploading complete...

 

Understanding why you might need a pull up resistor...

Not exactly a tutorial from directly within this forum, but nevertheless I'm more than sure that this will help a few new B4R users...

 

Hi,

based on previous Analog Read Example extended the solution by using the Arduino Ethernet Shield to send temperature data to B4J server and receive confirmation.
Full project (with...

 

Excuse my English, it's not my native language
I am not an arduino expert, I want to contribute with this code.

one of the main problems is to save information, one of this is in the EEPROM...

 

Sub Process_Globals
    Public Serial1 As Serial
    Private wifi As ESP8266WiFi
    Public mylcd As LiquidCrystal
End Sub

Private Sub AppStart
    Serial1.Initialize(115200)...

 

Hi,

based on previous Analog Read Example and Analog Read Example using Ethernet extended the solution by using the Arduino Ethernet Shield to publish the temperature from the Arduino...

 

Here is a nice tutorial by the guy in DronebotWorkshop. What surprised me (and I did not know that) is that with e-paper you only have power consumption while writing to it and no more. Even if...

 

Based on SSD1306 module, we can implement horizontal and vertical progress bars. These bars could be drawn at X1-Y1 to X2-Y2 like drawing rectangles, also we need to pass the full scale...

 

Based on SSD1306 module, we can display animated images the same as displaying animated GIF on PC. The animated image is a byte array contains (n) number of frames(bitmap images) they all...

 

Update:

1. Init Display as a separate sub
2. TFT_ESPI as "global"
3. Drawtext as a sub with parms
4. Updated example


Although there is a library and I appreciate the good work, I like to...

 

https://blinky-nina-w102.blogspot.com/2021/04/u-blox-nina-w106-sendo-programado-em_21.html