RPi disk storage

[dgadee]

Thanks. Ordered.

 

[dgadee]

I am back home with a spare RPi and have got it booting from a SSD. Not quite sure why it took me so many tries, nor why it eventually worked but system now has OpenCPN on it and no SD disk.

However, I am having a problem with the o-charts plug in. It says it is installed but then goes missing and the o-charts tab doesn't appear at all. What might be the problem? Usually permissions but how can I tell what user (pi, me, root) I installed OpenCPN with?

 

[Forty_Two]

I am back home with a spare RPi and have got it booting from a SSD. Not quite sure why it took me so many tries, nor why it eventually worked but system now has OpenCPN on it and no SD disk.

However, I am having a problem with the o-charts plug in. It says it is installed but then goes missing and the o-charts tab doesn't appear at all. What might be the problem? Usually permissions but how can I tell what user (pi, me, root) I installed OpenCPN with?

I would check Ocpn is fully updated & you have the latest O-chart plugin. I seem to remember there was an update a few months ago to the plugin. My ocpn is 5.6.2 & o-chart plugin is 1.0.17.0

Once booted open file manger & check the home folder name, thats the user its installed under assuming you can see the ".opencpn" folder in that home folder.

 

[dgadee]

All installed today with the package manager, though my OpenCPN is 5.2.4 and o-chart is 1.0.29

It seems to be installed under root. Not sure how that happened. I re-installed from my own user directory and still the same things happening.

 

[Stemar]

I got curious about the sizes of SD cards available and the first one to pop up in my search was this

https://www.amazon.co.uk/Micro-1024...cphy=9045799&hvtargid=pla-1678022264053&psc=1

1024GB for a tenner! Any guesses what the real capacity would turn out to be? Would it do anything apart from report it's claimed size?

 

[greeny]

Just got rid of my old 12v pc and installed a Raspbery Pi for nav (displays on a laptop replacement screen). I am wondering what people do for storage on these devices. Open Office is required and the usual admin stuff. Suggestions?

Hi dgadee,
I realize the initial post was a couple of months ago but hopefully you're still around.
I notice you said that used a replacement laptop screen for the display. At the moment I'm using a 12v tv screen via hdmi and find it uses a lot of power as you might expect. Changing to a laptop screen may help me reduce that usage. I'm interested to know any details you can provide on how you did it from a connection point of view. Laptop screens I've changed before have all been ribbon connected. Do I need an interface box or connection of some sort? Any information gratefully received.

 

[dgadee]

Hi dgadee,
I realize the initial post was a couple of months ago but hopefully you're still around.
I notice you said that used a replacement laptop screen for the display. At the moment I'm using a 12v tv screen via hdmi and find it uses a lot of power as you might expect. Changing to a laptop screen may help me reduce that usage. I'm interested to know any details you can provide on how you did it from a connection point of view. Laptop screens I've changed before have all been ribbon connected. Do I need an interface box or connection of some sort? Any information gratefully received.

You need to buy the screen and also the control unit. I saw how to do it on YouTube - and to make sure I got the correct driver unit I bought the screen first and used the info on it for the order. The control unit for mine was LP154WX4 TL. It cost about £20 or so. The screen was Acer Aspire 1410 15.4" Laptop Screen and cost about £30.

This gives you a screen and a unit which has ribbons to attach to the screen. I have attached the screen to the plywood panel above my chart table (very basic - four screws off the screen where the wide screw heads just hold the screen in place). The ribbons connect to the power supply and the RPi.

Edit: these prices are start of Covid. I wasn't able to get out to the boat until this year again.

 

[dgadee]

My problem seems to be found. I contact o-charts who said my version was too old even though it was downloaded through the RPi package manager.

I have found this: Flatpak [OpenCPN Manuals] and will try later today.

 

[dgadee]

To report back, o-charts gave me instructions on what to do. All a bit roundabout but I got there (not using Flatpak). They suggest that they always advise users of OpenCPN to install OpenPlotter because it will automatically update OpenCPN rather than have to do it manually.

I had also installed the 32 bit OS and they said it was better to use the 64 bit install, so I had to do that again.

However, all working. Booting off an SSD and able to install o-charts directly.