How can I communicate with a BLE device in Simulink?

function y = fcn()    
    persistent b;    %automatically initialized to []
    persistent hr;   %automatically initialized to []

      %%extrinsic declarations
      coder.extrinsic('ble');
      coder.extrinsic('characteristic');
      coder.extrinsic('read');
      if(isempty(b))
          b = ble("UA E39 MODULE");
          hr = characteristic(b, "heart rate", "heart rate measurement");
      end

      %%initialize output
      y = zeros(...)
      %%read data from BLE device
      data = read(hr);
      %%post-process the data
      y = ...
  end

Note that the 'ble'-related functions do not support code generation and therefore need to be declared as extrinsic.