B4R Tutorials

Hi guys,

I know I am not the most prolific B4R user, but I'm proud to have been the first to post on the "Share Your Creations" of this sub-Forum.
The mentioned sub-Forums have become more and...

 

The rWire supports communication with other I2C/TWI devices.

One device acts as the master and the other devices act as...

 

There is also an other quite useful capability of ChatGPT. It can help designing circuits by proposing components. The component it proposes is real and I have searched for it in...

 

One popular MCU programmer made an YouTube stream with online testing and comparing the MCUs.
1. pin out high
2. make a test operation: a + b, a - b, a * b, a / b, sin(a), power(a, b), power(b...

 

arduino-cli interface for the new B4R version can be adjusted by a configuration file, where i could setup at least the EN language - create the file "C:\Program Files\Arduino...

 

it is just 2 basic projects to do some tests with MQTT
we have no personal data in projects, full provisioning is done by a Web server interface

one basic project is with Wifi and MQTT client...

 

When i tried the initial code https://www.b4x.com/android/forum/threads/esp32-simple-ota-update-via-webserver.130576/ - i have faced tons of troubles with OTA via file system, at least, with...

 

I took Erel's BLE example and added (as on the ESP32 side) AES256 encryption. For some reasons I wasn't able to use SPIFFS and/or WiFi parallel to BLE on the ESP32 side. Maybe you find a...

 

This is my humble effort to produce a weather station (based on this project). You will need:

1 x Wemos D1 Mini
1 x BME280 Sensor
1 x TP4056 Li-Ion Charging board
1 x 3.7V Li-Ion Battery
1...

 

#Region Project Attributes
    #AutoFlushLogs: True
    #CheckArrayBounds: True
    #StackBufferSize: 600
#End Region
'Ctrl+Click to open the C code folder...

 

#Region Project Attributes
    #AutoFlushLogs: True
    #CheckArrayBounds: True
    #StackBufferSize: 600
#End Region
'Ctrl+Click to open the C code folder...

 

Here is a short tutorial on how to control an 8 channel relay module via MQTT. Below you will find both the WeMos and Android source codes needed to get started. The relay module is connected to a...

 

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

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

 

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'...

 

Example:

- AES256 encrypt a message with IV and Salt
- Base64 encode it
- send a http post request to a php script
- decrypt in php
- send back a AES256 encrypted and Base64 encoded message to...

 

This example replaces my previous examples with cleaner inline C coding (I'm getting better )using almost all variables from Globals. You can define the keysizes (eg. 2048 or 4096). It's fully...

 

Having had my work flow cut down in the middle by vicious "circumstances" I decided to let it all go and "go fishing" as mr. Miyaghi (Karate kid) would say. So I did some things I couldn't do...

 

MicroPython officially becomes part of the Arduino ecosystem | Arduino Blog

At Arduino we like to experiment with new technologies to figure out if we can use them to improve the tools we make for our users. We’ve recently been experimenting with the Python language as a possible extension for our programming platforms, considering how it has become the number one...

blog.arduino.cc

 

Hi
Here a sample program to control/monitor 8+8 digital Out-Inp, plus an I2C ADC.
The program use the MQTT protocol.
This program is an evolution of the previous one I posted.

This version add...

 

Hi
Here a sample program to control 8 outputs on arduino ESP32. The program use the MQTT protocol to exchange the data (really a single byte). By Node-red web interface the user set or reset the...