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  • Thanks for your help.

    I've found a workaround, it functions, but its not ideal and I doubt it's very efficient in terms of battery power. I check the RSSI (Signal Strength), and illuminate the LED depending on the result:

    NRF.setRSSIHandler(function(rssi) {
      sigStrength = rssi;
    function checkRssi() {
    if (sigStrength > -51){
    else {digitalWrite(LED1,0);
    function myFunction() {
      myVar = setInterval(checkRssi, 3000);

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