led

The company I work for have been looking at an alternative wall mounted android-based device with side LEDs. The device runs Android 8 I’ve previously used a different device from SIBO and I used their library (a jar file) with inline Java and that all worked, however this isn’t as simple. The...

I was just trying to make my first project with B4R. Also, I was a newbie in microcontroller programming. In this my first project, I make a dashboard in Node-RED to display a value from the ESP32 and to control the blue LED on ESP32. The value had been successfully sent, but until now the...

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...

This is my first attempt to create a library Please be kind :) This allows you to make a label with tiny indicator on left which can be turned on or off (with any choice of color) Usage instructions: - Download the ledlabel.jar & xml and put it in the B4X additional library folder - Add...

rLEDController is an open source B4R B4XLib for controlling multiple LEDs. The LEDController enableds to control up-to 10 LEDs individually, like turn ON/OFF, turn on for period of time or number of timer ticks. Background The background for developing this module, is to control a number of...

Hi All, I have a project to detect heartbeat by LED Flash Light and back camera. There are many apps already in the google play market. Such as 1. https://play.google.com/store/apps/details?id=si.modula.android.instantheartrate 2...

Hello, this is a simple B4A class to make easy the use of the built-in led of our beloved android devices. Tested on various devices up to android 8. The goal is to use the led as a Torch. The code is commented and comes with an example. It uses inline java and depends on: -Javaobject lib...

Hi to all, I'am trying to use the flash led of the phone like a Torch. I searched the community and found some examples (listed below), but none of them work in newer phone. To be more specific: - Motorola XT1039, Android 5: All example works - Sony Z5 Compact, Android 7: No Example Work -...