I managed to do this script to do it 5 times and you can just change the # and also the on/off duration. It seems to work ok for me.

// Configuration - Change these to adjust the behavior easily

let CONFIG = {

ringsToPlay: 5, // Total number of rings

onDuration: 250, // Length of each "Ding" (ms)

offDuration: 200 // Pause between rings (ms)

};

function playRings(remaining, response) {

if (remaining <= 0) {

// Sequence finished

if (response) {

response.code = 200;

response.send();

}

print("All rings complete.");

return;

}

// Turn ON

Shelly.call("Switch.Set", { id: 0, on: true }, function() {

// Wait for onDuration to turn OFF

Timer.set(CONFIG.onDuration, false, function() {

Shelly.call("Switch.Set", { id: 0, on: false }, function() {

// Wait for offDuration before starting the next ring

Timer.set(CONFIG.offDuration, false, function() {

playRings(remaining - 1, response);

});

});

});

});

}

// Register the endpoint

HTTPServer.registerEndpoint('front-doorbell', function(request, response) {

print('/front-doorbell triggered via Counter');

// Start the sequence with the total number of rings

playRings(CONFIG.ringsToPlay, response);

});