• That other device does seem to be sending a1 03 23 02 rather than just 23 02. Have you tried:

    NRF.sendHIDReport([0xa1,0x03,0x23,0x02], function() {
        setTimeout(function(){
          NRF.sendHIDReport([0xa1,0x03,0,0], cb);
        },500);
      });
    

    Not sure why you should need it, but hey...

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