Hello, i have a printer and scanner connected to a rpi 3b+ so everyone (at home) can access them through wifi.
Now the scanner is a CanoScanLide 400, which is powered though USB. This didn’t seem to be an issue with the raspberry, but recently i had to re-plug everything and now the scanner isn’t turning on with the raspberry anymore.
Does anyone have a suggestion for something low cost that is similar in size and power consumption and can support a usb powered device?
(Ideally also with wifi 5ghz, since this is the last device connected to the 2.4ghz)
If the scanner was working fine with the Pi before, I would suspect the USB cable or power supply. Try a different power supply and cables. The Raspberry Pi 3B+ can supply 1.2 amps from its USB ports which is sufficient for 2 bus powered devices. A powered USB hub can be used if you need to connect more bus powered devices to the Pi.
You were right. It was the bloody usb cable powering the pi. I had switched that to a shorter one for less cable, but switching back it works again. Thank you
Maybe it would work with a powered USB hub?
Out of curiosity, how did you solve that software wise? I was planning to do the same thing with my old MFP. Are you just using CUPS and SANE?
Using cups for the printer and a sane web ui (scanservjs) for the scanner
I’ll look into that, thank you!
Probably also check the power settings in the config file: https://kalitut.com/increase-usb-current-limit-raspberry-pi/