Sorry, I don’t have a NX yet, so I don’t know what power states are available:
sudo cat /sys/power/state
Use one of the available modes.
You may check if rtc can be used as wakealarm:
sudo su
# set wake alarm in 10s
echo +10 > /sys/class/rtc/rtc0/wakealarm
# check: this would display a number during the 10s, then nothing
cat /sys/class/rtc/rtc0/wakealarm
If it works, you may try (with an available suspend mode):
echo +10 > /sys/class/rtc/rtc0/wakealarm; echo freeze > /sys/power/state