Start Raspberry PI 3 at a specific time

RE: Start Raspberry PI 3 at a specific time

msimon — Wed, 08 Mar 2017 16:52:10 GMT

Hi littlegeek,

I am glad to hear this It looks like you found the solution and system is working If you turn Raspi off in the evening and turn on in the morning, I think the current system is perfectly fine. You don't need an MCU system If you don't need multiple on and off.

Mehmet

RE: Start Raspberry PI 3 at a specific time

michaelr747 — Wed, 08 Mar 2017 01:55:48 GMT

Hi Mehmet,

Thank you very much for taking the time to assist with my query, your answer has helped enormously. At this stage have gone with an external power supply timer, am also (with help) currently looking at your other excellent suggestion - (However, I recommend using a microcontroller and relay so that you can communicate between MCU and Raspi. Therefore, you won't cut-off electricity without shut downing the Raspi)

Am using the Raspberry Pi 3 for an in store shop monitor display, the mains power gets turned off everyday at 17:00, (back on 08:00) am using a daily command to shut Raspberry down at 16:45 and the external power timer to boot at 9:00. (even though it can boot at 08:00 there is a reason for starting it a 09:00)

Again many many thanks for your input

Regards

Michael

RE: Start Raspberry PI 3 at a specific time

COMPACT — Sun, 05 Mar 2017 22:47:59 GMT

I have the foggiest of minds.

Oops! - that thought turned to rain, hit the ground and turned to mud.

Reminiscent of my younger days in NZ.

RE: Start Raspberry PI 3 at a specific time

mcb1 — Sun, 05 Mar 2017 22:39:41 GMT

Therefore it should be possible to put both in a suitable power/sleep mode and wake up from a time triggered WOL/Magic Packet.

sounds like you have a new blog to write ...

RE: Start Raspberry PI 3 at a specific time

COMPACT — Sun, 05 Mar 2017 21:58:16 GMT

The PI's two main chips the BMC2835 and LAN9512 both support low power modes and the LAN9512 supports WOL and Magic Packet.

Therefore it should be possible to put both in a suitable power/sleep mode and wake up from a time triggered WOL/Magic Packet.

RE: Start Raspberry PI 3 at a specific time

mcb1 — Sun, 05 Mar 2017 21:22:41 GMT

It looks like overkill to me to have a computer to start another computer

yes and no.

There are many things the RPi just can't do, or doesn't do very well, and this also provides that functionality.

Many systems have a watchdog and this is simply a more capable watchdog.

Sadly I think it's pricing is making it less attractive, however it is a limited run, limited market and therefore quite justifiable.

If it was in the $10 range then it could become more mainstream.

Mark

RE: Start Raspberry PI 3 at a specific time

COMPACT — Sun, 05 Mar 2017 20:31:01 GMT

It looks like overkill to me to have a computer to start another computer.

RE: Start Raspberry PI 3 at a specific time

shabaz — Sun, 05 Mar 2017 13:33:40 GMT

It is a nice, competent product for exactly this task. Jon sent one to me at the time, and it was clear he'd put a lot of effort into it.

Very short blog post on the early version of it here:

Sleepy Pi Overview

RE: Start Raspberry PI 3 at a specific time

mcb1 — Sun, 05 Mar 2017 01:54:41 GMT

Jon Watkins produced these.

Sleepy Pi - Spell Foundry

As i understand they were designed for just the type of thing you're looking for.

Mark

RE: Start Raspberry PI 3 at a specific time

msimon — Sat, 04 Mar 2017 12:32:54 GMT

SHIM RTC Realtime Clock will not do the job you want. SHIM RTC Realtime Clock (I miswrote it) Witty Pi Realtime will do but as you said it is expensive. Why do you want this? I mean RasPi consumes little power so you can turn off the peripheral devices and activate them when you need via software.

There are some methods you can apply:

If you have an uninterruptible power you can put Raspi in halt mode and activate it by lowering pin 5 (RPI safe mode - eLinux.org ). You can use an MCU with RTC and lower that pin whenever you want to activate it. You also need a software on Raspi to halt it.

If you turn off Raspi remotely, you can use external power timer. However, I recommend using a microcontroller and relay so that you can communicate between MCU and Raspi. Therefore, you won't cut-off electricity without shut downing the Raspi.

Mehmet

RE: Start Raspberry PI 3 at a specific time

COMPACT — Sat, 04 Mar 2017 09:19:38 GMT

See if you can use WOL (Wake On LAN)

If not then try using and external power timer.