Pi Undervoltage/power issues: I had a strange lightning bolt/temperature symbol with an exclamation mark popup in my navbar, what does that mean?

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73

Your PS is rated 5V 2A -> raspberrypi.org recommends 5V 2.5A

https://www.raspberrypi.org/products/raspberry-pi-3-model-b-plus/

74

I've used this the past 5 years!!
First time to see this message!

75

Power supplies do die sometimes... 5 years, easily long enough with constant use. The Raspberry Pi does not lie about under voltage/overheating, please, stop trying to tell us it is. At least try a different power brick before putting 100% faith in it, and ignoring what the measurements say. Thanks.

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76

Why do you assume you know how I use it!!
5 years is when I purchased it.. Simple answer!

I only use it when I have to print.. So its not like its 150% always on!!!!
Since FEB2020, this is the first time time to re-plug in the Pi!

77

Well, you weren't exactly upfront with much information, it sounded to me like you used it for 5 years, not bought 5 years ago.

Maybe something died in it whilst in storage?
Maybe something in the circuit has corroded/degraded?
Maybe something you did to it broke it?
Maybe something inside it was bad quality, and couldn't last 5 years?
Maybe something on the connector in the Pi has broken?
Maybe something I haven't listed has broken?

There are so many reasons it could die. There is not much else we can say, other than 'fix it' since it is broken. I don't really know what else you have in mind?

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78

I will see if I can find another power supply and a digital multi meter for reading the output.

Thanks

79

I used to have this problem. In my case, it was the cable.

80

It would be nice to be able to turn these indicators off (just off, not permanently off).

In my case, the indicator was on (not blinking) so I went out and bought a new power supply which claims to provide 5V 2.4A, but the indicator is still on, but not blinking. I aIt would be nice to be able to turn these indicators off (just off, not permanently off).

I assume that powering down the pi will reset this indicator but I don't actually know...

Additionally, being able to turn the indicator off could be helpful sometimes in determining what action in pi/octoprint land leads to under-voltage

81

Restarting OctoPrint clears the indicator, there are two states it can be in:

  • Blinking: There is a problem now
  • Solid: There has been a problem since the last restart

And I don't imagine we will provide a way to turn them off since they are an important part of diagnosing issues. Power supplies cause loads of problems, and this is usually the only thing to fix some issues.

What Pi model are you using? Raspberry Pi 3+ & 3B+ require 5V 2.5A, Pi 4 5V 3A. 2.4A sounds a bit like a phone charger to me. You can see this for all models here:

82

I am using a Pi 3B+.

At the risk of appearing to insist, If I can turn the indicator off (again not permanently off, not ignoring undervoltage forever) I could probably live with an undervoltage condition that occurred 2 hours ago and has not recurred at all since. At the present time I have no idea if undervoltage happened once at boot time or if it happens fleetingly every five minutes when I'm not looking at the indicator...

83

If you open up the octoprint.log it will log whenever the undervoltage warning has been triggered, if you want to look at when it happens

84

@Higonnet
This indicator has it's use.
I just has an issue here with a user who was not able to connect to his K8200.
I pointed to the undervolatge issue he had. He increase the max current of his PS and now it's working fine for him.

If you have this issue you should really get away that icon by removing the undervolatge/power issue, not by ignoring (deleting) it.
Sooner or later you may get in real trouble with such a problem and you do not know the reason.

Hint: If your PS is fine, have a look on the connectors and cables.

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85

Hi!

I'm using:

  • Ender-3 Pro.
  • SKR E3 DIP 1.1.
  • OV5647 Pi Camera with two IR LED.
  • Raspberry Pi 3 model B.
  • Raspberry Pi Fan.
  • Telegram plugin.

What i've done:

But I still receive undervoltafe message. There is no corrosion, broken cable or strange messages in log file. What else can I do?

86

edit: didn't read you already tried it without usb devices.
Then there isn't much you can do I would say :confused:
I would try the 0.18.0 rc image - so you tried everything :man_shrugging:

87

Also the voltage sensor circuit of the RasPi can be faulty.

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How I can measure voltage without a sensor?

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I don't mean it is not working at all. It may report wrong values.

90

This pretty much never happens, since it is not a sensor but an analogue on/off. If input voltage is below 4.65V, the circuit trips the undervoltage warning. Never seen this break before, I wouldn't recommend mentioning it. People lose faith in it if they think it can break - it doesn't lie, if there is undervoltage there is undervoltage.

Only other way to check is to get an inline USB voltmeter.

@Barrel_Titor - The power supply is most likely faulty, you may need to get a new one. Or measure it's output in-line. The DJI mavic PSU is not a good replacement - get another official PSU if you can.

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91

I see. Thanks for that info.

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92

Is there a brand that anyone can recommend? I bought my RaspberryPi 3B+ from the official site and ordered a 3amp power supply along with it. When it arrived, the white power supply with both UK and US style adapter, actually has 2.5 amps printed on it. It does work ok, supplying enough for Octopi to work but I have 3 others which also say that they are good for 2.5 amps and they will not run Octopi although they are the good Chinese ones :slight_smile: .