#does anyone know what alt boards are direct swaps for the rpi?

89 messages · Page 1 of 1 (latest)

heady pine
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currently looking at le potato, orange pi, bannana pi - ideally i'd like to be able to plug in the sd card i had used on my rpi and have it work on the alt pi, or at least require minimal changes from the original mainsail os configuration

placid condor
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Afaik there is no direct swappable alternative as it would have to be a direct clone of the pi itself. You can't even use your Pi4 sd card in a Pi3 for example. If you just want to use a MainsailOS and copy your settings over, an OrangePi Zero 2, Orange Pi 3 LTS or Orange Pi 4 LTS would be the best alternative atm as it's the only other SBC with an officially supported MainsailOS

heady pine
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if i want to copy my settings over how would i do that then?

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the sd card shows up as having 2 partitions, D and E with D being labled as boot. can i just copy E in it's entirety?

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i assume i'd need to use linux to copy it since windows doesnt seem to recognise what i assume is ext4

placid condor
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Don't copy the partition!!!!!!

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Download your configs from Mainsail UI

heady pine
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oh ok

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yeah i cant exactly do that without a working pi

placid condor
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I didn't had that info ^^

heady pine
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i can still just download it by accessing the partition in linux cant i?

placid condor
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Then use something like diskinternals linux reader. You can use that to get access to the partitions Windows can't read

placid condor
heady pine
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mmk

placid condor
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Do you need your print history too? This could be a bit more difficult and I can't assist you with that. But others on this server would be capable of that

heady pine
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nah print history isn't important to me

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i would appreciate it if someone could explain to me why my pi 4b just randomly overheated and died though

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i doubt anyone would know why though

placid condor
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The most important things should be located under ~/printer_data/config

placid condor
heady pine
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made so sense to me, no visible damage

placid condor
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This sounds like some resistance build up somewhere or too high voltage

heady pine
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rapidly flashing red pwr that makes a slight clicky noise every time it flashes, act doesnt light

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anyway it doesn't matter, my assumption is that it's just dead

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even if it was just the ovp tripping it's not like i have a replacement diode to repair it

heady pine
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from what i can tell the important stuff is in ~/klipper_config

placid condor
placid condor
heady pine
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i've already updated everything through the mainsail interface

placid condor
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I don't know when but at some point the klipper_config folder got renamed to printer_data

heady pine
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oh so i should be using printer_data?

placid condor
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If you got the klipper_config before it stayed there

heady pine
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in there i have a config file as well

placid condor
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Then look at them and check which one are the correct ones

heady pine
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they are empty when i open them in kate

placid condor
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Then the klipper_config one should be the correct one. Like I said, afaik the klipper_config folder where still be used if you got it before that change

heady pine
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ic

placid condor
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You can also make a complete backup of your sd card before wiping it. That way you won't loose anything if you forgot something

heady pine
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even if say the charging cable were faulty all of a sudden, the resistive heating should occur in the cable, and the pi would simply brown out

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are there any tests i can do to investigate the damage to my pi?

placid condor
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Try to boot it with a complete fresh installation. If it doesn't boot it'll be hard to say what exactly is damaged. Then you maybe could measure voltage on different parts on the pi.
But I don't have much expertise on this overall topic, so I won't be able to trouble shoot it with you. Here are just some steps that could narrow it down, if your Pi boots again.
Check every single port if there is maybe something shorting. You can try different power sources, different usb devices, different load levels, different cables.

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Do you have a small heatsink on the chip of the pi?

heady pine
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i have one of those aluminium heatsink covers for the pi

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i've tried booting it with fresh mainsail but maybe i'll try again with a better sd card as well as with plain raspbian

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i also tried plugging it into this one power supply i have that doesnt give enough current, but has an lcd display with the current draw

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for some reason when i plug it into that the display completely blanks out

placid condor
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Then there might be a short on your pi power input

heady pine
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could be

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i've removed the case and inspected for shorts as well as tested without the case, but i couldnt find anything

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maybe i'll check the port itself and try a different cable

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any idea about the slight clicking sound from the pwr led?

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i'm not sure if its normal as usually my printer is too loud to hear it

placid condor
heady pine
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mm alright

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todo:
• inspect for short in power input & other ports
• try different cable & check if cable is the short
• reflash with a better sd card, try mainsailos and raspbian
• figure out how to measure voltage on the pi to see whats functional

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will get back to this tomorrow

placid condor
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Is the pwr led on or just clicking?

heady pine
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power led is on with very fast constant flashing

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it seems to make a very quiet click sound every time it flashes

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with nothing else to base it on i'd say its maybe 3x faster than the blinking of an ethernet cable port

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but i know thats a bad metric

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oh and i believe the last 2 error messages i got in mainsail were that the pi browned out and that it lost power

placid condor
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What wattage and volt rating does your power supply has and what raspi version are you using?

heady pine
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my power supply is a qc3.0 36w power supply that claims to supply a max of 4A at 5V

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i switched to a better cable for testing and managed to get my power led to stay solid, however still no signs of life from the act led

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in doing so, i smelt something and realised that the pcb was getting warm, but none of the electrical components were

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i've since stopped attempting to power the pi incase i do any heat damage but this seems quite weird to me

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inspecting the bottom of the pcb, there are some regions that i notice have a different surface finish, appearing glossy, like varnish or a wet surface

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i've outlined the areas with this appearance in red here

IMG_4735.jpg
placid condor
heady pine
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no strange appearance on the top of the pcb at all

placid condor
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Then it should be something inside your ports

heady pine
heady pine
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or the gpio

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since thats where the (presumably) melted areas are

placid condor
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The GPIO seems fine on the picture

heady pine
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any change this is caused by the ovp diode?

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this charger i have is supposed to have built in overvolt protection, but assuming that the qc3.0 port doesnt have that, the voltage would have increased when my cable went bad

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supposedly the ovp diode will short to ground when overvolted, but where exactly is this ground that it shorts to?

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i'm basically wondering if the ground it shorts to is run through some weird convoluted path on the pcb

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because if so, that would explain why the pcb itself heats up, yet none of the components do

placid condor
placid condor