Guide

1/12/2018 mbed Starter Kit Experiment Guide - learn.sparkfun.com
https://learn.sparkfun.com/tutorials/mbed-starter-kit-experiment-guide/all 50/65
You can also plug the SD card into your computer and open the “temp_data.txt” file with a text editor (located in the SD card’s root directory).
Linux
To begin, we need to find out which USB serial port the mbed is attached to. Unplug the mbed. Open a terminal and enter:
ls /dev/tty*
Plug the mbed back into your computer and enter the command again:
ls /dev/tty*
A new tty device should appear. In my case, I saw “/dev/ttyACM0” show up. Make a note of which new tty device appeared. Use the screen command to open a
serial terminal to the mbed:
sudo screen /dev/<your tty device> 9960
Note that you will likely need root access to open the serial terminal!
Press the reset button on your mbed and wait while temperature data is collected. After about 10 seconds, you should see the temperature data appear in your
Terminal.
You can also plug the SD card into your computer and open the “temp_data.txt” file with a text editor (located in the SD card’s root directory).
Concepts
In this tutorial, we introduced several new concepts. In particular, sending text over serial to a terminal is incredibly useful for debugging and interacting with your
project.
Serial Terminal
The serial terminal dates back the first computers and mainframes of the 1960s. In order to interact with a mainframe, several terminals were connected to the
mainframe, often with an RS-232 serial connection. These terminals offered a simple keyboard and monitor with a command line interface. Users could type
commands and get a response back from the mainframe.