B4R Tutorials

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...

 

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...

 

This is not a tutorial for B4R. I think a glossary of terms might be useful for beginners to electronics and B4R. So I created my own list in GitHub to record the terms that I find need...

 

This example generates a OTP/2FA ("One Time Password") as you know it when you login to a website and you get a 6 digit code via sms. It changes every 30 seconds.

How it works:

- as it is time...

 

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...

 

Here's an updated example how to

- generate an RSA keypair (Public and Private key) on a ESP32 and on B4x
- export these keys in PEM format (compatible with any other plattform like B4x, .net...

 

 

Merry Christmass everyone in the Christian community of this forum,

Yesterday I 've had a great crazy idea which turned out to be a working one too.

Normally one would answer to the question if...

 

Good morning everyone,

I have put together this Excel file which shows the "translations" bettween AWG value of cable (american wire gauge) and european metric value of surface and diameter. I...

 

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...

 

Hey everyone,

here is an implementation of a car lights checker which reports if all 4 car's lights are working properly. To find out if there is a problem with the lights (head and rear) we use...

 

Hi guys,

So B4R is so much more than simply code and breakout boards assembled/connecter by jump-wires and breadboards...
I know for a fact that most of us are not electronics pronned and thus...

 

 

This example (adapted from the Arduino examples under Arduino->File->Examples)

- downloads a file from a server (exactly: the update file)
- store this file to the filesystem (SPIFFS)
- starts an...

 

This example downloads a file from a server folder (here I use a folder in htdocs on my apache server) and saves it to a file on the file system. Tested with 700KB files. Set headers (browse the...

 

This is an updated example how to en-/decrypt data with AES256.

Libs needed: jRandomAccessFile only

Notes:

- As far as I know, the ESP32 doesn't support padding like PKCS5/7, so I had to do it...

 

Ola

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

 

My office gets cold overnight in winter. I have a heater which has a basic thermostat but its very inaccurate (its just a min/max dial not temperature based). If I leave it on...