How to turn on raspberry pi 4 after software shutdown (poweroff)?

Question

Raspberry Pi

Good afternoon,

after the poweroff command Rpi 4 turns off and usually you need to turn off and turn on the power to restart.

Interested in options for starting the system without distorting the power supply.

Also are there any ways to reduce Rpi current consumption in "sleep" mode (after poweroff)?

Answer 1

1) The device does not support WAKE-ON-LAN and similar technologies. The only way is to collect some electronics separately. For example, it can be a primitive arduino with a clock, in which the time of a new switch-on will be recorded before turning off.
2) Based on p / p 1, consumption from raspberries can be made zero if the external electronic collective farm completely turns off the power. Then the current consumed will completely depend on the current consumed by the electronic collective farm, which, in turn, will depend on the applied trigger - if it is a timer, it can work from CR2032 for years, but if it is wi-fi or Ethernet - here, alas, they are eating quite a bit of.