AnsweredAssumed Answered

Toggling an external LED via BLE

Question asked by johanandrade on Jul 11, 2018
Latest reply on Sep 26, 2018 by Mario Ignacio Castaneda Lopez

Hey folks,


Trying to get a starting point for a bluetooth project. I want to build a project toggling on/off an external LED connected to my R41Z (based of KW41Z board) using an Android phone app.


  • R41Z board
  • External LED wired to PTB18 GPIO
  • SDK v2.2 (4-16-18) with bluetooth v.1.2.5 stack
  • Android phone app built using Android Studios 3.1.3


My questions are:


  • Should I use the beacon bluetooth project as a base? If not, what would you suggest to start with?
  • If using the beacon project, which files should I be looking at modifying for the LED functionality, signal advertising, receiving the message from the phone app, etc.?
  • When it comes to the phone app, are there certain IDs that are within the beacon project that have to be used on the code for the phone app? I see the file BLE_SIG_DEFINES_H has GATT declarations but I'm not too familiar yet how these play a role within the phone app.