GCM not waking up device

Question

I developing a GCM application. Everything works fine when the device is not idle (i.e. sleeping by pressing the power button). However, when I send the message when the device

Answer 1

delayWhileIdle=false

delay_while_idle : If included, indicates that the message should not be sent immediately if the device is idle.
The server will wait for the device to become active, and then only the last message for each *collapse_key* value will be sent. Optional. The default value is false, and must be a JSON boolean.