Cool stuff for Raspberry Pi, Arduino and all electronics hobby projects
Notifications
Clear all

[Solved / Archived] Always start on power up?

5 Posts
2 Users
0 Likes
56 Views
(@cjefferies)
Posts: 8
Active Member
Topic starter
 

Currently I have not set anything as far as schedules but I see the default state is ON.  I just want to confirm that with that setting, the raspberry pi will always come on no matter under what state it went down.  Most of the time it will be turned off as a graceful shutdown and it is understood the yanking a power cord could leave the OS in an unrecoverable state. The raspi is in an enclosure that is already designed and it is difficult to open (for a reason).

The wittypi4 is being powered by 20V from a mac power supply.  It's rock solid and I feel very confident in this configuration...  as long as it will always start when power is applied to the witty board's 6-30V input.

Thanks.

 
Posted : 23/06/2024 11:14 pm
(@admin)
Posts: 371
Member Admin
 

Setting the default state to ON means the device will turn on your Pi when the device is NEWLY powered. This only happens when the device just get connected to its power supply. If your Witty Pi is constantly connected to a power supply, and your Raspberry Pi has been shut down (and power cut), this setting will not bring your Pi back on.

If you want to make sure your Pi will always be turned on, the "garenteed wake mode" may be helpful. It is newly introduced in firmware Rev7, and is not included in retailed boards yet (you need to flash it by yourself).

 
Posted : 24/06/2024 9:43 am
(@cjefferies)
Posts: 8
Active Member
Topic starter
 

Thank you.  I'm OK with trying to flash the witty, but let me make sure...

My goal:
A - if the raspi goes through a clean shutdown, it should turn off and stay off
B - if the power is disconnected, well, it goes off and stays off
C - if the power has been disconnected and power is reconnected, it should always come on

So if there is a clean shutdown, the only way to start it up is to disconnected power and reconnect power - this is what we want.

 
Posted : 24/06/2024 8:48 pm
(@admin)
Posts: 371
Member Admin
 

@cjefferies If the default state is set to ON (it is by default), and your power supply is good, your goal A, B and C will all be achieved.

If your power supply is not that stable (for example a battery charged by solar panel), there is chance that it tries to boot your Pi but fails. In such case turning on the garenteed wake mode may help.

Posted by: @cjefferies

the only way to start it up is to disconnected power and reconnect power

This is only true when you do not schedule any startup in the future, and do not configure startup for overtemperature/undertemperature.

 
Posted : 25/06/2024 12:28 pm
(@cjefferies)
Posts: 8
Active Member
Topic starter
 

OK.  No settings for scheduled startups nor have any temperature setting been defined.  I think we're good.  Thanks.

 
Posted : 25/06/2024 7:00 pm
Join Waitlist We will inform you when the product arrives in stock. Please leave your valid email address below.