How do I get the Signal/Noise Value of my current Wifi using Apple Script?
System Information
Network
Wifi-Fi
Current Network Information:
Signal / Noise:
For signal strength you can use:
set signal_strength to do shell script "/System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -I|grep agrCtlRSSI|grep -o '\\-[0-9]*$'"
and for noise:
set signal_noise to do shell script "/System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport -I|grep agrCtlNoise|grep -o '\\-[0-9]*$'"
Related
I have a task for my thesis which includes a camera and several LEDs and they can be controlled by some bash commands. To access the system, I need to run ssh root#IP and access the default path of the system. Under this path there is a script which opens the camera application by running ./foo and once it is executed, I am inside the camera application. Then, I can check the temperature of the LED's etc by typing i.e. status -t
Now my aim is to automatize this process to check the temperature by a bash script or python code. In Bash, If I run i.e ssh root#192.168.0.1, ./foo and status -t consecutively, I can get the temperature value. However, executing ssh root#192.168.0.1 './foo' 'status -t, ends in a infinite loop. If I do ssh root#192.168.0.1 './foo', I expect to be in camera application but this opens the application weirdly such that I can't execute status -t afterwards.
I tried also something like this
ssh root#192.168.0.1 << EOF
ls
./foo
status -t
EOF
refer to
or in python using subprocess ssh using python and with paramiko.
but nothing really works. What actually differs my situation from the rest of these examples is that my commands depend on each other, one opens another application and run the next command in the next application.
So the questions are
1- Does what I am doing make sense and is it even possible?
2- How to apply is in a script/python code?
I have a very limited list of software that I can install on an (IOT edge) device. I have minicom and chat commands (in addition to standard commands like echo and cat), and need to write to a serial device a command and read the response.
The device in question is a modem, and I need to run AT commands on it. If using minicom and setting up the menu etc. I can run these commands normally, and get the output. The problem is that I have around a thousand of these devices, so setup and data logging needs to be automated.
So within these parameters is there a way to run minicom and capture the output without any interactive elements? I have tried
minicom -S scriptfile -C outfile
where scriptfile (for now) contains following:
sleep 1
send "AT"
This seems to ignore the sleep command, and outfile is created, but is left empty. Also what would I need to add to the command that it wouldn't open a session or interactive element?
I have a bash script that executes several long-running commands on Mac OS. How can I prevent the computer from going to sleep while the script is running?
I found that I can achieve the desired behavior by adding this line to the start of the script:
caffeinate -i -w $$ &
How it works:
caffeinate is a built-in Mac OS utility for creating power management assertions to prevent sleep.
The -i flag tells caffeinate to prevent idle sleep.
The -w flag tells caffeinate to wait until the specified process finishes.
$$ is a shell variable containing the current PID. Together with the -w flag this tells caffeinate to prevent sleep for the duration of the shell script.
The final & runs the command in the background so the script can continue running.
I have a Sky wireless sensor node and a script which prints the output from the node.
sudo ./serialdump-linux -b115200 /dev/tmotesky1
If I start this script before my pc detects the node, I get the following error:
/dev/tmotesky1: No such file or directory
But if I wait for example 20 seconds, I miss the initial prints (which are important).
Is there a way to detect if the /dev/tmotesky1 exists?
Something like
while [ ! -f /dev/tmotesky1 ] ; do sleep 1; print 'Waiting...'; done
Thanks in advance!
Your code indicates that you are using Linux where you can use the hotplugging mechanism.
On generic systems, you can write an udev rule (--> see with udevadmin monitor -e what happens when you attach the device) which starts e.g. a program or writes something into a pipe. When systemd is used, you can start a service (see man systemd.device).
On small/embedded systems it is possible to write a custom /sbin/hotplug program (set in /proc/sys/kernel/hotplug) instead of using udev.
Is it possible to set the baud rate for Macs in a terminal? If yes, how to set the baud rate in terminal through the terminal?
I am trying to talk to the Mac using an Arduino (open source microcontroller), an XBee (wireless communicator) to type in the terminal through the serial monitor. The only problem I am having is the baud rate of the serial monitor and terminal are different. I can easily change the baud rate for the serial monitor in the Arduino, but I do not know what the baud rate is for the terminal in Mac.
On Mac OS, stty seemingly can only change terminal settings for an ongoing access.
It works to either:
Access the serial interface, e.g. cat /dev/cu.usbserial, the default settings will be used at first. On a different terminal use stty, e.g. stty -f /dev/cu.usbserial 230400 to set the baud rate, the settings of the terminal accessed before will change.
There is a small time window after executing stty, in which the access can be performed with the desired parameters, e.g. stty -f /dev/cu.usbserial 230400 & cat /dev/cu.usbserial executes stty, detaches it and then immediately performs the access to the serial device.
For one line command logging serial port /dev/tty.usbserial-X's output to cat.out and terminating the logging by pressing Ctrl+C, here is the solution: trap 'kill $(jobs -p)' SIGINT ; cat /dev/tty.usbserial-X | tee cat.out & stty -f /dev/tty.usbserial-X 115200. You can type Ctrl+C to terminate logging to cat.out. (edited)
This only seems to work for the /dev/cu.* device files. I don't know the difference from /dev/tty.* files.
Minicom is an excellent tool that does exactly what you're asking for. You can get it using apt on ubuntu but should check this Tutorial out for Mac.
Keep the serial reset issue in mind if you plan on sending data to the Arduino. see http://arduino.cc/playground/Main/DisablingAutoResetOnSerialConnection
stty 19200 or so.
Check man stty, you can set stop bits, speed, etc.
Surprised that no one mentioned picocom which could set higher bard rate up to 4000000.