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2v09.87

I've tried a lot of things.
reboot,reset...
even hard reset!
nothing helps. It drives me a little crazy.

the output of your code (that's how I checked it too)

1 BluetoothDevice: {
  "id": "e2:54:81:aa:af:05 random",
  "rssi": -41,
  "data": new Uint8Array([2, 1, 6, 13, 9, 80, 117, 99, 107, 46, 106, 115, 32, 97, 102, 48, 53]).buffer,
  "name": "Puck.js af05"
 }
4 BluetoothRemoteGATTServer: {
  "device": BluetoothDevice: {
    "id": "e2:54:81:aa:af:05 random",
    "rssi": -41,
    "data": new Uint8Array([2, 1, 6, 13, 9, 80, 117, 99, 107, 46, 106, 115, 32, 97, 102, 48, 53]).buffer,
    "name": "Puck.js af05",
    "gatt":  ...
   },
  "connected": true }
Uncaught Error: Unhandled promise rejection: ERR 0x11 (BUSY)

Hello!
I am studying the interaction of two puck devices.js
I need to transfer data from one device to another.
I use tutorials from the Internet.
A strange error occurs at the getPrimaryService stage.

My Code:

var gatt;
NRF.requestDevice({ timeout: 5000, filters: [{ namePrefix: 'Puck.js 4bcd' }] }).then(function(device) {
   return device.gatt.connect();
}).then(function(g) {   
    gatt = g;  
    console.log("4");
return gatt.getPrimaryService("6e400001-b5a3-f393-e0a9-e50e24dcca9e");
}).then(function(service) {  
  console.log("5");
  return service.getCharacteristic("6e400002-b5a3-f393-e0a9-e50e24dcca9e");  
}).then(function(characteristic) {
  console.log("6");
  return characteristic.writeValue("LED3.set()\n");
}).then(function() {
  gatt.disconnect();
  console.log("OK!");
});

When I call this code

return gatt.getPrimaryService("6e400001-b5a3-f393-e0a9-e50e24dcca9e");

An error appears:

Uncaught Error: Unhandled promise rejection: ERR 0x11 (BUSY)

Execution stops, information does not go to the second device.
I don't understand what the problem is, I couldn't find an answer on the Internet.