* [Part-1: Introduction to IoT systems and single-board computers (SBC)](#part-1-introduction-to-iot-systems-and-single-board-computers-sbc)
* [Accessing to SBCs by USB](#accessing-to-sbcs-by-usb)
* [Accessing the RPi4 by ssh](#accessing-the-rpi4-by-ssh)
* [Error connection](#error-connection)
* [Basic commands on the Bash](#basic-commands-on-the-bash)
* [Basic configuration](#basic-configuration)
* [Updating the system and installing VIM](#updating-the-system-and-installing-vim)
* [Changing the bb's or rpi4's hostname](#changing-the-bbs-or-rpi4s--hostname)
* [Changing the user's password](#changing-the-users-password)
* [Time and internet access](#time-and-internet-access)
* [Oh My Bash](#oh-my-bash)
* [SSH Key pairs](#ssh-key-pairs)
* [Starting with the ESP32](#starting-with-the-esp32)
* [Git](#git)
<!-- vim-markdown-toc -->
# Introduction
This repository is developed to cover the embedded systems lecture at summer school in Jade University.
@ -60,6 +81,16 @@ and the key for the corresponding IP address 2806:103e:5:50f4:3ad2:69ff:fef9:46b
```
you have to edit the '.ssh/known_hosts' file, and delete the lien that contains the offending key and the corresponding IP address given the warning.
## Basic commands on the Bash ##
Next are listing the most used and common commands on the bash-shell:
- `ls`
- `touch`
- `rm`
- `mkdir`
- `cd`
- `cp`
let us play a little bit on bash.
## Basic configuration
Once you are able to connect or get in into the SBC, a basic configuration and package installation is required. The next section will guide you install Vim, the SBC's hostname, the user password, internet access and time, and finally to install a useful bash tool.
### Updating the system and installing VIM
@ -241,5 +272,23 @@ Now try logging into the machine, with: "ssh 'debian@bbb-marx.local'"
and check to make sure that only the key(s) you wanted were added.
```
# Starting with the ESP32
# Starting with the ESP32 #
The next section will introduce the basics of programming the ESP32 with the Arduino IDE. The first codes allow us to use the GPIOs, serial communication, Wi-Fi, and finally the MQTT protocol.
Nevertheless, some basics of Git *Control Version System* is required before start.
## Git
Git is a system for version controller developed by Linus Torvalds in 2005 for developing the Linux Kernel.
Then, you can specify Git configuration settings with the git config command. One of the first things you did was set up your name and email address:
also you can set the main editor or client to commit:
```
git config --global core.editor emacs
```
Now, try to create a new repository with two files: file-a and file-b, add some lines of code, and make a commit. Next, make some changes, and only commit the changes on file-a, the changes on file-b restore them to previous commit.
