led

  1. hvvdl

    B4R Question Control Leds [SOLVED]

    The problem is solved very simply. From B4a send 2 consecutive messages to B4R. Sub Process_Globals Public Serial1 As Serial Private AStream As AsyncStreams Private WiFi As ESP8266WiFi Private WiFiStr As WiFiSocket Private MQTT As MqttClient Private MQTTOpt As...
  2. irhamnur00

    B4R Question ESP32 connected to Node-RED, but it can't receive a topic message input from the server

    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...
  3. P

    Android Question LED switch on / off

    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...
  4. mohsyn

    B4A Library LEDLabel 1.01

    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...
  5. rwblinn

    B4R Library rLEDController

    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...
  6. youjunjer

    Android Question Heartbeat Detect by LED Flash Light and Back Camera

    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...
  7. DavideV

    B4A Class Torch class

    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...
  8. P

    Android Question Turn On / Off Flash Led

    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 -...
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