##Question "Everytime I try to power down my Arietta via __shutdown -h now__ or __halt__ it reboots immediately afer it shuts down. What is my mistake? Or has my board any defect? Or how to power ist down properly ?" ##Answer On the Arietta, the Shutdown line is connected on the power regulator enable so to be able to put Arietta in sleep if you use a battery for the RTC. In order to shut down Arietta properly the right command is hence

# shutdown -h -H now

In this way the shutdown command will not lower the shutdown line and you can safely remove power when the board halts. Without the -H the shutdown line will lower at the board halt bringing down the 3V3 voltage so you are doing a very hard reset only (useful some time).