Connect Rpi to Mini
Hey folks, I have connected my Rpi with Octoprint to my Mini as follows: the Rpi is powered by the USB-A port on the printer and sends it data to the micro-USB port of the printer. Currently this works, but I don't have a camera installed yet. Will this be a problem in the future?
I'm looking in to buying a Rpi V2 camera and don't exactly know if this draws more power than the USB port can handle.
RE: Connect Rpi to Mini
Hey folks, I have connected my Rpi with Octoprint to my Mini as follows: the Rpi is powered by the USB-A port on the printer and sends it data to the micro-USB port of the printer. Currently this works, but I don't have a camera installed yet. Will this be a problem in the future?
I'm looking in to buying a Rpi V2 camera and don't exactly know if this draws more power than the USB port can handle.
Hello and welcome to the Prusaforum!
I use the same constellation and everything works perfectly. However, I have not installed an V2 Picam, but this one:
https://www.amazon.de/-/en/gp/product/B00RMV53Z2/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
The camera has a low power consumption and does not like to be interrupted during operation!
The USB ports on the pi should not be overloaded, otherwise the Raspi could become unstable.
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.
RE: Connect Rpi to Mini
It depends on which version of the Pi you are using. If you are running a Pi 4 you will need more power than the a standard USB port can supply and should use a proper power supply.
RE: Connect Rpi to Mini
@gordon-w
I'm running a Raspberry Pi 3 B+. So I'm hoping the USB-A on the printer outputs enough to get the Pi and Pi v2 camera going.
RE: Connect Rpi to Mini
Standard USB power supply is 500mA.
The Pi 3 B+ draws between 500-600mA.
It could work, but you are pushing that USB output from the buddy board to the limit by using it to power the Pi.
With the Pi 3B+ and Pi 4, it's better to use an external power supply to power the Pi.
There's a neat power consumption chart of the different Pi's:
hw: PRUSA MINI+, FW 4.3.3 & Cr-10s w/ BLTouch, Ezboard, Hemerasw: PrusaSlicer 2.4, Windows 11
RE: Connect Rpi to Mini
Just want to add, the RPi3 and RPi 4 are less tolerant to voltage drops from the power supply. If they are run near the limit of the power source, in this case the USB output, they will frequently display the low voltage colored screen (obviously only visible when a screen is connected) and run a higher risk of crashing, corrupting the SD card.
Prusa Mini FW4.4.1
RE: Connect Rpi to Mini
I've been trying to get this set this up with my new Mini+, but I don't seem to be having any luck getting a proper power feed from the USB-A port on the printer. I'm using an RPi 3A+ to run Octoprint, so the current draw should be within spec for the USB-A port, and the setup runs without issue if I connect an extra power adaptor for the RPi instead.
However, I'd prefer to get a 5V power feed from the printer, so I was wondering if anyone had any suggestions as to what I might have overlooked and could try. Am I missing something in terms of Settings, or do I need to use a special cable USB-A to USB-Micro cable that only has power pins, or might there be a problem with my printer - maybe a blown fuse or PCB issue?
Any help will be much appreciated. Thanks.