I sucessfully used the code in order to put the stalker in sleep mode and wake it up after a number of seconds. It work fine, but I noticed a problem. I’m using NewSoftwareSerial library to read a serial and I saw that every time something is sent on the serial port, the stalker wakes up!
Is there any way to avoid this? I understand that this could be done by design, but the problem is that if I try to read the serial just after the exit from sleep mode, I loose some chars.