I can only get output from a connected usb robot arm when I run my Python script in sudo. I assume I need to give normal user permission for the usb device. How would I do this?
Related
I want to set up a built-in Bluetooth module of Raspberry pi for providing wifi SSID and Password using MATLAB. But I don't find any Bluetooth object in MATLAB to connect the raspberry pi Bluetooth. i used MATLAB raspbian Image os
I have tried to openShell command for setuping the bluetooth
OpenShell Command
sudo bluetoothctl
sudo discoverable on %or
discoverable on
but i got this error:
Failed to set discoverable on: org.bluez.Error.Failed
I have a raspberry pi but no external keyboard, mouse or ethernet cable to set it up - but I do have micro-sd card reader. Is there a way for me to just write my wireless internet config straight to the micro-sd card so the raspberry pi will be able to connect to the wifi, and then allow me to ssh in?
The micro-sd card already has Raspbian installed on it.
Sure.
Put the card in a drive and mount it.
Go to the partition called boot.
Create an empty file called ssh just using:
touch ssh # Works in Linux/macOS
type NUL >> ssh # Works in Windows
Create a file called wpa_supplicant.conf with your WiFi settings - be very sure that Windows hasn't added any .txt extension:
country=US
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="NETWORK-NAME"
psk="NETWORK-PASSWORD"
}
Once it works, and you can ssh successfully into the Raspberry Pi, be sure to run:
sudo raspi-config
and permanently enable ssh for subsequent reboots.
We are running the latest raspibian on the raspberry pi board and have a kernel driver for a USB peripheral which is added externally (sudo insmod driverx.ko) after boot-up by connecting to the hardware using ssh (its a headless system).
The problem is as follows:
If the device is already connected to the system upon power-up then running sudo insmod driverx.ko leads to the terminal getting stuck (no response, Ctrl+C doesn't work). Running lsmod by starting another ssh session shows that the module is in use even though there is no code running that will use it.
If I plug the USB device after the system boots up then sudo insmod driverx.ko works normally, (the terminal is still active). Running lsmod subsequently shows that that module is loaded but not in use by anyone. I can then run my user code and everything is fine. Upon running my user code lsmod shows the kernel module is in use and the number of users is 1.
In our system the USB device will always be plugged in. The kernel version and the driver version are the same.
I can fill in more details but do not wish to bias or make this query un-readble.
Please advise on what could the problem be.
Thank you for your time and help.
Possibility is that, the device is already attached into some other driver during startup. If it’s the case, the device credential of your specific device has to be removed from the startup driver.
Check the USB device list before to insert your driver.
Hello Friends,
I have a raspberry pi powered with Raspbian OS. I want to create a device which will perform some action like "open calculator ,open notepad,etc" on windows pc by commanding from a raspberry pi. So my problem is how to establish communication between raspberry pi and another windows pc ?
If i use VNC and SSH service, can i invoke other programs remotely on pc ?
You could use netcat, also known as nc which is included in most Linux distros and is available for Windows.
All you would do on the Windows box is get your IP address with:
ipconfig
Then you would start listening on some random port, say 5000 because that has no security restrictions and pass whatever arrives on that port to CMD.EXE for execution:
nc -l -p 5000 -e CMD.EXE
Then, on your Raspberry Pi, you would just do:
nc <WINDOWS_IP_ADDRESS> 5000
Now you can type Windows commands in your Rasperry Pi terminal for execution on the Windows box:
DIR
NOTEPAD
There is a "cheatsheet" here and I am using the technique in the section entitled "Backdoor Shells".
Note that this is a big security hole, but if it is just for yourself playing around on a private network, it is nice and simple.
I am using a Raspberry Pi to provide network access to a Western Digital media player that has no network interface. The player if just an external HDD and automatically mounts when it is connected.
The problem is that it's HFS formatted, so to be able to read and write it I have to unmount and then remount it with these commands:
sudo umount /dev/sda2
sudo mount -o force -t hfsplus /dev/sda2 /media/wdhdd/
Which works fine, but I don't want to have to SSH in via terminal to run these manually every time I reconnect the HDD.
Is there anyway to auto run a script when an external USB device is mounted?
Because this has to be done every time this USB device is plugged in, you should edit the procedures done when it is plugged in. You can find out more about this by visiting this explanation