15 votes
Accepted

Why do the USB ports and Ethernet port share the same controller?

You're right in your understanding that the shared USB/ethernet bus is something of a bottleneck. One option is to use a Pi 3 over WiFi. The WiFi chip doesn't share a bus with the USB sockets and ...
goobering's user avatar
  • 10.7k
11 votes
Accepted

Transfer a file from Raspberry to Mac

Run the command on your Mac: scp [email protected]:/path/to/file . And the file will be transferred to your current directory. Assuming your Raspberry Pi is accessible through its default hostname ...
techraf's user avatar
  • 4,319
7 votes

Why do the USB ports and Ethernet port share the same controller?

The controller is a Microchip LAN9512 and the reason it is used instead of, e.g., a bunch of independent controllers is presumably: Price. Here's an example of somewhere you can buy 100 of them @ $...
goldilocks's user avatar
  • 58.7k
7 votes

Why do the USB ports and Ethernet port share the same controller?

USB 2.0 has a maximum transfer rate of 480Mb/sec (Megabits) Now, the actual transfer rate in the real world is far slower. My Pi 2 has a maximum of 220Mb/sec (Megabits) throughput over USB. The ...
You'reAGitForNotUsingGit's user avatar
6 votes
Accepted

Weather Balloon - How to Transmit Data?

At those ranges Gigahertz comms (WiFi/Bluetooth) won't cut it. Check the Pi in the Sky project , which uses 433 MHz comms by default. Depending on your range requirements you might want someone with ...
flakeshake's user avatar
  • 6,235
6 votes
Accepted

Does the Raspberry pi 4 have USB 3.0 or 3.1?

Raspberry Pi 4 supports only USB 2.0 (2 ports) and USB 3.0 (2 ports). All other RPis support only USB 2.0. RPi 4 does not support the higher speeds of USB 3.1. This is due to their hardware ...
Seamus's user avatar
  • 21.7k
5 votes

NFS transfer speed Raspberry Pi 2 vs 3

Does anyone know how much speed I would gain in the same scenario with a Pi3 (just about..)? Only if the Pi currently does this with a very high processor usage, say 75%+. This would indicate it is ...
goldilocks's user avatar
  • 58.7k
4 votes
Accepted

Getting Information from one Raspberry to another

As a beginner it may seem a bit taunting on how to actually transfer data, or how to ask the correct question on how to do it. The reason is because there are so many ways to do. A popular way to be ...
Piotr Kula's user avatar
  • 17.3k
4 votes

Can I send a Text file using the Audio Jack of the Raspberry Pi 3

There are several solutions: quietnet -> https://github.com/Katee/quietnet minimodem -> http://www.whence.com/minimodem/ morse code
user1505575's user avatar
4 votes
Accepted

Digital data reading using GPIO

I am surprised your search did not find any solutions. How do you think computers communicate? The simplest solution is to use a serial link. For Arduino to Pi connect the Arduino's TX pin to the ...
joan's user avatar
  • 70.9k
4 votes

Using /mnt vs /media for Transmission storage on external hard drive

The default names and structure for linux are defined in the Linux Standard Base (LSB). Part of this document is the Filesystem Hierarchy Standard. Herein you find the definition for /media : Mount ...
Ingo's user avatar
  • 42k
4 votes

how to transfer file between two RPI over Wi-fi?

To answer your last point This is a good "scenario" ? and with the announcement I am a a beginner and I wanted to start with a simple project : connecting 2 RPI together and send data( ...
Ingo's user avatar
  • 42k
4 votes
Accepted

Is there a way to use the USB-C port as power and for something else?

The USB-C connector on the Pi DOES NOT implement USB-C. It is used for power and a USB-2 OTG interface.
Milliways's user avatar
  • 59.5k
3 votes

Simple data transmission from multiple Arduinos (client) to Raspberry pi (server) wirelessly

You've chosen a difficult route. If there's anything whatsoever you can do to get some cables into the freezer you should do so. You can now do things with Bluetooth Low Energy (BLE) on a Pi without ...
goobering's user avatar
  • 10.7k
3 votes

Transfer a file from Raspberry to Mac

Techraf's answer is good, and what I would do myself. However it won't work if SSH is not enabled. Here are a couple of other alternatives. You could use a service like Dropbox. or what used to be ...
Steve Robillard's user avatar
3 votes

Does Raspberry Pi 3.0 support HDMI 2.0 standard?

Since RPi 3 uses BCM2837 SoC, you're out of luck: BCM283x supports HDMI V1.3a. Not sure what the "rate of output" means, but HDMI 1.3a runs at a frequency of 340 MHz and a data rate of 10.2 Gbps. ...
Dmitry Grigoryev's user avatar
3 votes

Raspberry Pi zero bluetooth max transfer speed

Bluetooth 4 does not have the same speed capacities as bluetooth 3 + HS. The high speeds were deprecated after bluetooth 3. As written on this article.
Miz 's user avatar
  • 101
3 votes

How can I receive sensor data from my raspberry pi when it is far away from any wifi?

satcomm module cost: $250 monthly fee: $15 https://www.sparkfun.com/products/13745
jsotola's user avatar
  • 646
3 votes

Transfer files from Raspberry Pi Zero W to PC over USB

Here's how I do it: Configure your network services properly. You're using your PiZero as a server of sorts, so you'll want to set your PiZero's IP address to a fixed value. Once you've accomplished ...
Seamus's user avatar
  • 21.7k
3 votes
Accepted

Handle data while filming with rPI

The Raspberry Pi (all models) feature USB 2.0 ("Hi-Speed") only; which has a net data transfer of 40 MB/s at best (1); real life performance might even be less (2). Share that data rate between ...
Ghanima's user avatar
  • 15.8k
3 votes

Hosting LAMP on SD-card in RPi now - would like to move whole database and website to External USB 3.0 SSD

I want more speed, I wanna be able to upload large files to my webpage quickly and I think USB 3.0 + External SSD with Exts4 on it will do the trick nicely. Mount your external drive to apache2 web ...
M. Rostami's user avatar
  • 4,293
3 votes

Importing raspi data from sd card to computer

Raspbian's main partition (containing home and everything) cannot be seen by a Windows computer unfortunately. A Linux PC would see it fine, and probably a Chromebook or a Mac as well. If you want to ...
Botspot's user avatar
  • 1,759
3 votes

Raspberry Pi 4 local network for territories without access to the internet

It is very simple to create a stand alone access point with a Raspberry Pi without internet connection. So all devices supporting WiFi can connect to it and share its data. You can use the RasPi to ...
Ingo's user avatar
  • 42k
3 votes

What are the expected write speed for external storage connected to USB 3 (blue) on Raspberry Pi 4 B

I'm also using JMicron JMS567 SATA 6Gb/s in Bulk Only Transport protocol and I'm getting similar write speed: Write speed test: sync; dd if=/dev/zero of=./test.tmp bs=1M count=1024 > 1073741824 ...
Vasil Kalchev's user avatar
2 votes

NTFS with high CPU usage

Add -o big_writes to your mount commmand or big_writes to /etc/fstab So the mount command above would become: mount -i -t ntfs -o big_writes /path/to/partition /mount/point
Quetza's user avatar
  • 121
2 votes
Accepted

Clone raspberry sd from 32 to 16 GB

Do a backup of your current 32GB SD You will get a 32GB *.img file, this is OK Get any Linux computer and download this tool (PiShrink) Use it like this: ./pishrink my32Gbfile.img newimagefile.img ...
MadAntrax's user avatar
  • 921
2 votes
Accepted

Simple data transmission from multiple Arduinos (client) to Raspberry pi (server) wirelessly

I'd recommend evaluating the ESP8266 for your application. It is a powerful wifi solution that costs ~5$ on amazon and much cheaper on aliexpress for bulk purchases. There are many boards based off ...
Shreyas Murali's user avatar
2 votes

Transfer a file from Raspberry to Mac

There are many ways to do this. ssh certainly works from the command line, but there are better ways, which most macOS users would find familiar. If you install netatalk on the Pi you can use it from ...
Milliways's user avatar
  • 59.5k
2 votes

What is the best way to send data from my RPI to my PC?

How often does this need to be updated, is it more than twice a minute or so, or is it long term logging(Once an hour or day, maybe)? If the latter, one way to do it would be to create a PHP-script ...
DriverUpdate's user avatar

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