B4R Tutorials

Using Firebase to send notifications to iOS and Android devices

• By Erel
• Sep 29, 2016

Inspired by this example: https://dzone.com/articles/iot-push-notifications-arduino I've created a similar solution in B4X.


When the button is clicked, two http requests...

 

Attachments

• ESP8266_Push.zip

  1.5 KB · Views: 2,908

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How to connect a 7 pin OLED display, (NOT 4 pin)...

• By Peter Simpson
• Mar 5, 2017

Here is how to connect a 7 pin OLED display to an Arduino.

If you are anything like me, you previously owned a Raspberry Pi and did absolutely nothing with it. Well before I ever owned any...

 

Last edited: Mar 7, 2017

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Connecting to Arduino with BLE (Bluetooth Low Energy)

• By Erel
• Apr 14, 2016

In the previous example we broadcasted a single byte as part of the advertising data: https://www.b4x.com/android/forum/threads/ble-hm-10-module-broadcasting-a-single-byte.65785/

In this...

 

Attachments

• B4i_BLE.zip

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• B4A_BLE.zip

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Last edited: Jan 17, 2018

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GSM / GPRS - Control the Arduino with SMS messages

• By Erel
• May 11, 2016

The GSM shield allows the Arduino to connect to cellular networks. This opens the door for many interesting outdoor...

 

Attachments

• GSM_Example.zip

  2.3 KB · Views: 2,150

Last edited: Oct 8, 2017

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Arduino - PC File Transfer

• By Erel
• Jun 8, 2016

In this example the Arduino board acts as a server. Clients can list the available files and can download files stored on the SD card, which is part of the Ethernet shield...

 

Attachments

• B4R_FileTransfer.zip

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• B4J_FileTransfer.zip

  3.2 KB · Views: 1,542

Last edited: Aug 14, 2018

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Downloading a Web page with ESP8266

• By Erel
• Sep 1, 2016

Edit: use rHttpUtils2 instead: https://www.b4x.com/android/forum/threads/module-rhttputils2-http-client.74785/#content
As a general rule, I recommend to use Raspberry Pi with B4J to...

 

Last edited: Dec 21, 2017

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RTC DS1302 Example

• By rwblinn
• Jun 2, 2016

Hi,

this is an example of using the Real Time Clock DS1302 (from sunfounder).
There are two versions:
1. Manual: Set the time manual befor uploading. After uploading the time is...

 

Attachments

• B4RHowToRTCDS1302.zip

  347.2 KB · Views: 1,623

Last edited: Jun 3, 2016

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Traffic Light Example

• By Erel
• Apr 11, 2016

Example of implementing a "traffic light" with 3 leds. There are four states: red, red + yellow, green and yellow.

It uses CallSubPlus to switch to the next state after the current state...

 

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How to Implement STM32 into B4R

• By Starchild
• Jun 17, 2016

If you want more FLASH memory space (say 128K flash), need more RAM (how about 20K), would like your program to run a little faster, or simply want to play around with a different micro-controller...

 

Attachments

• How to Implement STM32 to B4R.pdf

  207.7 KB · Views: 1,051

Last edited: Aug 11, 2020

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ESP8266 + UDP + BMP180 = Simple weather station

• By Erel
• Aug 22, 2016

This is an example of how UDP can be used to broadcast the current temperature and pressure to one or more clients.

The nice thing about it is that there is no server involved. The ESP8266 just...

 

Attachments

• B4R_Weather.zip

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• B4J_Weather.zip

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• B4A_Weather.zip

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• B4i_Weather.zip

  2.3 KB · Views: 1,529

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Simple example of how to have a TCP Server and make HTTP Client calls in same project

• By miker2069
• Sep 24, 2017

I thought I'd share this super simple example of creating a TCP Server and making very simple HTTP Client calls in same project. Typically most projects do one or the other and not both. Here...

 

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ESP8266 OTA updates

• By BaGRoS
• Sep 3, 2017

Maybe useful for somebody. It's not my tutorial!

 

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Control servo and relays using Nextion lcd display

• By ilias
• Aug 30, 2017

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...

 

Attachments

• Nextion.zip

  417 KB · Views: 1,414

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Some code to write into and read from EEPROM on ESP8266

• By JMB
• Aug 5, 2017

Hi,

My first tutorial.

I've been playing with code to do what the title says and I have come up with this.

It should be self explanatory.

It relies on the use of B4Rserializator.

B4X:

...

 

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OLED displaying data from a USB to Serial com port using AsyncStreams - B4R, B4J and VB.Net

• By Peter Simpson
• Jul 14, 2017

Here is a really simple tutorial with source code on how to send data through a computer com port or laptop USB to Serial com port to receive data on your Arduino based microcontroller board. I...

 

Last edited: Jul 6, 2019

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Show-Off your IoT boards ( uControler/shields )!!

• By Cableguy
• Apr 11, 2016

There seem to be quite a few variants of the Arduino's Boards, So I thought, let's Show-Off our Boards and create a Listing, similar to the B4A devices Listing, so that when problems arises, we...

 

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ESP8266 - WiFi Remote Configuration

• By Erel
• Jul 3, 2016

Edit: A simpler and more powerful tool is available: https://www.b4x.com/android/forum/threads/esp-configurator-based-on-b4rserializator.81452/

The attached project allows the user to...

 

Attachments

• ESP8266WiFiRemote.zip

  2.6 KB · Views: 5,935

Last edited: Jul 9, 2017

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Big-endian and Little-endian

• By Peter Simpson
• Jun 28, 2017

I didn't know what was the difference was between Big-endian and Little-endian, so I just looked up about it on the internet as I needed to know the difference for a sketch I was converting. I...

 

Last edited: Jun 29, 2017

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What is SPIFFS (SPI Flash File System)?

• By Peter Simpson
• Jun 28, 2017

I didn't really know what SPIFFS stood for. I knew the basics of what it was but still I should have known more about it, so here is some information about SPIFFS.

Please note: I didn't...

 

Last edited: Jun 29, 2017

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Connecting an actual building\house alarm PIR sensor

• By Peter Simpson
• May 20, 2017

This is a tutorial on how to connect an actual building\house alarm PIR sensor to an Arduino and how to interpret 5 alert states (the resistance results). The advantages of using the PIR sensor in...

 

Last edited: May 23, 2017

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