3 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
4 # Use of this source code is governed by a BSD-style license that can be
5 # found in the LICENSE file.
7 """Sends a heart beat pulse to the currently online Android devices.
8 This heart beat lets the devices know that they are connected to a host.
10 # pylint: disable=W0702
15 from pylib import android_commands
22 devices = android_commands.GetAttachedDevices()
23 for device in devices:
24 android_cmd = android_commands.AndroidCommands(device)
25 android_cmd.RunShellCommand('touch /sdcard/host_heartbeat')
27 # Keep the heatbeat running bypassing all errors.
29 time.sleep(PULSE_PERIOD)
32 if __name__ == '__main__':