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by BeauSlim
Mon Jan 13, 2020 11:50 pm
Forum: General discussion
Topic: PCIe over cable standard. I didn't know that was a thing.
Replies: 22
Views: 780

Re: PCIe over cable standard. I didn't know that was a thing.

It's a valid thing to do; it's in the specs. I'm fairly sure Apple had a product which exposed an external PCIe lane; not sure what it was for -- something graphicsy, I think -- but it did exist. You are talking about Thunderbolt, an Intel standard. It is included in the USB4 spec. It isn't an Appl...
by BeauSlim
Sun Jan 12, 2020 10:25 pm
Forum: General discussion
Topic: Resolving Under Voltage Issue
Replies: 8
Views: 285

Re: Resolving Under Voltage Issue

The voltage from your buck converter will drop when you put a load on. I'd start by setting its output to 5.2V, which should be safe. Micro USB cables can definitely be a problem, especially with the hair-thin cables in the cheap ones. I literally had a cheap cable catch fire powering a Tinker Board...
by BeauSlim
Sun Jan 12, 2020 10:03 pm
Forum: Troubleshooting
Topic: ir-keytable not working on RPi3/Buster
Replies: 5
Views: 225

Re: ir-keytable not working on RPi3/Buster

To run ir-keytable, I think you first have to disable/stop any services that are using the socket. Maybe you have lircd running? Or some kodi component?

I'm not using it with Kodi. I have a Pi Zero W set up with irexec to send commands to various computers on my network via ssh and mqtt.
by BeauSlim
Sun Jan 12, 2020 9:47 pm
Forum: Advanced users
Topic: Raspberry Pi 4 as a NAS or personal cloud server?
Replies: 23
Views: 54086

Re: Raspberry Pi 4 as a NAS or personal cloud server?

I have the same HF2-SU3S2 enclosure, but mine is branded "mediasonic". It does not support UASP. UASP is a big deal with SSDs, but I don't see a huge difference with spinning disks. pboh, yes, you are doing "software RAID" if you are using mdadm (or zfs or btrfs) to create an array and then formatti...
by BeauSlim
Fri Jan 10, 2020 3:00 am
Forum: General discussion
Topic: PCIe over cable standard. I didn't know that was a thing.
Replies: 22
Views: 780

Re: PCIe over cable standard. I didn't know that was a thing.

If you want to access the PCIe, there's a write up at http://mloduchowski.com/en/blog/raspberry-pi-4-b-pci-express/ Yeah, those crypto-mining risers don't follow any actual standard. They are using USB3 connectors and cables because they have enough conductors to get the job done, but they are not U...
by BeauSlim
Wed Jan 08, 2020 2:43 am
Forum: Troubleshooting
Topic: Poor SATA to USB HDD performance.
Replies: 22
Views: 609

Re: Poor SATA to USB HDD performance.

I have two guesses for you:
1. You need to change your kodi cache settings to buffer local file systems: https://kodi.wiki/view/HOW-TO:Modify_the_video_cache
2. You have a power issue. Try with the HD unplugged. Try with a powered hub. Try with a different 3A power supply.
by BeauSlim
Sat Jan 04, 2020 5:11 am
Forum: Networking and servers
Topic: Pi 4 as home wifi router?
Replies: 8
Views: 419

Re: Pi 4 as home wifi router?

It is certainly doable, but the cost of all those adapters are going to add up and I'll bet performance is going to be terrible compared even to cheap AC AP boxes from good brands like Ubiquiti, etc. with proper antennas.

If you want to tinker, just make sure you buy OpenWRT compatible gear.
by BeauSlim
Sat Jan 04, 2020 4:24 am
Forum: General discussion
Topic: new to raspberry pi need help with script at boot up
Replies: 2
Views: 91

Re: new to raspberry pi need help with script at boot up

On Raspbian Linux (which is based on Debian and is also very similar to Ubuntu), the "correct" way to do this is to create a systemd service. The quick and dirty way is to use the /etc/rc.local file.
by BeauSlim
Sat Dec 28, 2019 9:56 pm
Forum: Troubleshooting
Topic: Systemd networking -a guide
Replies: 8
Views: 340

Re: Systemd networking -a guide

systemd-resolved can be troublesome if you are wanting local hostname resolution. I usually end up disabling it.
by BeauSlim
Sat Dec 28, 2019 8:36 pm
Forum: Beginners
Topic: Why doesn't Raspbian have a Print utility?
Replies: 50
Views: 2100

Re: Why doesn't Raspbian have a Print utility?

Are you sure that you want to teach a 10 year old that killing trees should be part of his programming workflow?

I'm a geezer that grew up working on paper and I almost never print.
by BeauSlim
Wed Dec 25, 2019 7:24 pm
Forum: Advanced users
Topic: Help on configuring Rpi4 as access point
Replies: 2
Views: 198

Re: Help on configuring Rpi4 as access point

Bridging gets complicated if you are bridging/repeating wifi-to-wifi.

For Raspbian buster:
https://raspberrypi.stackexchange.com/q ... ith-bridge

For OpenWRT:
https://openwrt.org/docs/guide-user/net ... figuration
by BeauSlim
Wed Dec 25, 2019 6:57 pm
Forum: Beginners
Topic: What Programming language to learn and MODBUS TCP
Replies: 1
Views: 107

Re: What Programming language to learn and MODBUS TCP

Python is usually a good choice unless you need high-performance or tight timing. I haven't played with MODBUS for over a decade, and haven't tested any of these, but it looks like there are lots of currently maintained libraries: for Java / Python / .NET http://easymodbustcp.net/en/ for C: https://...
by BeauSlim
Wed Dec 25, 2019 5:56 pm
Forum: Beginners
Topic: Beginner stuck on file sharing from mac to set up Lakka
Replies: 3
Views: 156

Re: Beginner stuck on file sharing from mac to set up Lakka

Why not just share the file system over the network?
by BeauSlim
Mon Dec 16, 2019 5:50 pm
Forum: General discussion
Topic: Connecting Mac Pro to Raspberry board
Replies: 2
Views: 141

Re: Connecting Mac Pro to Raspberry board

Mac Pro? Those are desktop boxes without displays. Do you mean Macbook Pro? There are quite a few HDMI adapter boards available for various panels used in Apple products, including Macbook Pro and iPad displays. They are all small run "boutique" boards, though, tend to be expensive, and may be diffi...
by BeauSlim
Mon Dec 16, 2019 5:46 pm
Forum: Troubleshooting
Topic: Problem connecting to WiFi network o Rpi 4.
Replies: 28
Views: 2575

Re: Problem connecting to WiFi network o Rpi 4.

There have been posts about the USB3 ports interfering with WiFi on the 2.4 GHz band. This is actually quite common (i.e. is not just a Pi4 issue). See https://www.intel.ca/content/www/ca/en/products/docs/io/universal-serial-bus/usb3-frequency-interference-paper.html If you have a peripheral plugged...
by BeauSlim
Mon Dec 16, 2019 5:37 pm
Forum: Troubleshooting
Topic: Segfault in command line interactive apps
Replies: 6
Views: 186

Re: Segfault in command line interactive apps

If there is data on that SD card that you care about, as scruss said, stop immediately. Put the card in read only mode (eg using the switch on a uSD to SD adapter) and create a backup image using dd. If you don't care, by all means continue. Try to cat your log files and dmesg for hints about what's...
by BeauSlim
Mon Dec 16, 2019 5:10 pm
Forum: General discussion
Topic: Securing Raspbian on Pi4
Replies: 3
Views: 264

Re: Securing Raspbian on Pi4

The guide that jamesh linked is a great start. I would add port knocking (knockd) to the basic list of requirements for a net-exposed machine. In terms of security, raspbian is is basically Debian Linux, so hardening guides for Debian or Ubuntu will generally apply. I think it is getting a little bi...
by BeauSlim
Mon Dec 16, 2019 4:56 pm
Forum: General discussion
Topic: how can i power the Raspberry PI4 from the GPIO port ?
Replies: 6
Views: 288

Re: how can i power the Raspberry PI4 from the GPIO port ?

I've seen some recommendations to use multiple GPIO pins to power SBCs if your power needs are high. A wire each on GPIOs 2 and 4 (splitting the 5V) and 6 and 9 (splitting ground).
by BeauSlim
Wed Dec 11, 2019 4:50 am
Forum: General discussion
Topic: Raspberry Pi... PDA?
Replies: 9
Views: 396

Re: Raspberry Pi... PDA?

I am sure you could build a PDA using a Pi Zero W, a TFT touch screen, and a battery charger board.

But, yeah, you'll be happier with a recycled Android phone with an alternative OS on it. If you hate Android, have a look at https://postmarketos.org/
by BeauSlim
Wed Dec 11, 2019 3:22 am
Forum: General discussion
Topic: raspberry pi in a 5.25 drive bay?
Replies: 2
Views: 177

Re: raspberry pi in a 5.25 drive bay?

There is at least one design on Thingiverse.
by BeauSlim
Tue Dec 03, 2019 10:24 pm
Forum: Advanced users
Topic: What storage available for the PI in 2020?
Replies: 3
Views: 557

Re: What storage available for the PI in 2020?

Diablo2_Fan wrote:Any cheap SSD and an adapter.
It's not quite that simple. There are some SSD-USB adapters/enclosures that work better with Raspbian, so you'll want to search these forums for recommendations. You'll want working UAS at a minimum, and also TRIM and SMART support if at all possible.
by BeauSlim
Fri Nov 29, 2019 8:22 pm
Forum: Advanced users
Topic: How an I improve sshd latency?
Replies: 1
Views: 180

Re: How an I improve sshd latency?

Your latency sounds like a wifi issue to me. Eliminate WiFi as much as possible and test. Plug your Pi4 into your WiFi AP via Ethernet. Does your chromebook have an Ethernet port? You *could* use a USB to TTL serial adapter with your chromebook, but I think that you'll find that clumsy compared to s...
by BeauSlim
Thu Nov 28, 2019 9:30 pm
Forum: Advanced users
Topic: Does 1750Mhz need overvoltage and a fan?
Replies: 8
Views: 527

Re: Does 1750Mhz need overvoltage and a fan?

You want quiet and you want to preserve the warranty, and these are both at odds with overclocking. If you *do* need that little performance bump, or if you just want to overclock for fun, I'd just make sure that you have good air flow over the sink. If testing shows that your Pi is averaging more t...
by BeauSlim
Tue Nov 26, 2019 2:47 am
Forum: Graphics, sound and multimedia
Topic: [SOLVED] Questions regarding TFT project (Previously Raspbian GUI with ili9341?)
Replies: 9
Views: 454

Re: Questions regarding TFT project (Previously Raspbian GUI with ili9341?)

Good job! First, what does the | symbol mean when used in the terminal? I couldn’t find anything at all when searching online (as though google was just ignoring the symbol altogether) Yes, I'd imagine that would be difficult to google for. In UNIX/Linux terminology it's usually called a "pipe". It ...
by BeauSlim
Sat Nov 23, 2019 11:50 pm
Forum: Troubleshooting
Topic: hostapd rtl8822bu refuses to go into wifi AC mode RPI4
Replies: 3
Views: 216

Re: hostapd rtl8822bu refuses to go into wifi AC mode RPI4

The 8822bu driver doesn't seem to support full "AC" in AP mode, but it does seem to do "N" just fine. I also had trouble getting better than "G" speeds until I added ht_capab=[HT40+] Here is my working /etc/hostapd/hostapd.conf for an Asus AC-53 Nano Some things (like wmm_enabled=1) may be unnecessa...

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