That will turn off the 3.3V rail on shutdown. The 5V rail is always on.
Code: Select all
Linux rpi4 4.19.75-v7l+ #1270 SMP Tue Sep 24 18:51:41 BST 2019 armv7l The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. Last login: Fri Nov 1 11:11:31 2019 [email protected]:~ $ vcgencmd bootloader_config BOOT_UART=0 WAKE_ON_GPIO=1 POWER_OFF_ON_HALT=1 FREEZE_VERSION=0 [email protected]:~ $ sudo halt Connection to rpi4.local closed by remote host. Connection to rpi4.local closed.