change the contents of install os

sunfounder · Mar 4, 2022 · b7a5640 · b7a5640
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diff --git a/docs/source/3d_printer_monitor.rst b/docs/source/3d_printer_monitor.rst
@@ -142,7 +142,7 @@ Open the Raspberry Pi's browser, and enter ``http://192.168.18.179/?#temp`` to l
 
   The IP address 192.168.18.179 will need to be replaced with the local IP address of the Raspberry Pi. Hover the cursor over the WiFi icon on the Raspberry Pi desktop, and the local IP address will be displayed.
 
-  .. image:: img/appendix1.png
+  .. image:: img/ip_know.png
     :width: 700
     :align: center
 

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diff --git a/docs/source/install_the_rpi_os.rst b/docs/source/install_the_rpi_os.rst
@@ -1,99 +1,115 @@
 INSTALL THE RASPBERRY PI OS
-=============================
+======================================
 
-In this chapter, we firstly learn to write the Raspberry Pi OS to your Micro SD card. 
-You can check the complete tutorial on the official website of the Raspberry Pi: 
-https://projects.raspberrypi.org/en/projects/raspberry-pi-setting-up.
+An operating system needs to be installed onto the Micro SD card before inserting it into the Raspberry Pi.
 
 .. note::
-    If you have already done it, you can skip this chapter.
 
-**Required Components**
+  Skip this chapter if the Raspberry Pi already has an operating system installed.
 
-+-------------------------+--------------------------+
-|1 * Micro SD Card        |1 * Personal Computer     |
-+-------------------------+--------------------------+
-|1 * Micro SD Card Reader |                          |
-+-------------------------+--------------------------+
 
-**Step 1**
+Raspberry Pi Imager is a quick and easy way to install the Raspberry Pi operating system to a Micro SD card from a computer or laptop.
 
-Raspberry Pi have developed a graphical SD card writing tool that works on Mac 
-OS, Ubuntu 18.04 and Windows, and is the easiest option for most users as it will 
-download the image and install it automatically to the SD card.
+Browse to the Raspberry Pi Imager site and download the version that matches the computer or laptop\'s  operating system (www.raspberrypi.org/software). When the download is complete, launch the installer program and follow the prompts to install the Raspberry Pi Imager.
 
-Visit the download page: https://www.raspberrypi.org/software/. Click on the 
-link for the Raspberry Pi Imager that matches your operating system, when the 
-download finishes, click it to launch the installer.
+.. image:: img/3d1.png
+  :width: 400
+  :align: center
 
-.. image:: img/image22.png
+If the Windows operating system prevents the application from launching, click on **More info** and then click on **Run anyway** to install the Raspberry Pi Imager.
 
-**Step 2**
+.. image:: img/3d2.png
+  :width: 550
+  :align: center
 
-When you launch the installer, your operating system may try to block you from 
-running it. For example, on Windows I receive the following message:
+Insert the Micro SD card into the computer or laptop's SD card slot. If the computer or laptop only has a full-size port for SD cards, use a Micro SD card adapter.
 
-If this pops up, click on **More info** and then **Run anyway**, then follow the 
-instructions to install the Raspberry Pi Imager.
+.. In the Raspberry Pi Imager, select the Operating System to install, and then select the SD card to install the image on.
 
-.. image:: img/image23.png
+.. .. image:: img/3d3.png
+..   :width: 550
+..   :align: center
 
-**Step 3**
+.. .. note::
+..     * The computer or laptop will need to be connected to the internet during the first time the Operating System is installed.
 
-Insert your SD card into the computer or laptop SD card slot.
+..     * After the first installation, a copy of the Operating System installed from the Imager will be stored on the computer or laptop, and will be available for future use, even while offline (Location of lastdownload.cache will be here: ``C:/Users/<username>/AppData/Local/Raspberry Pi/Imager/cache``). The next time the Imager software launches, it will display “Released: <date>, Cached on your computer”.
 
-**Step 4**
+.. mark
 
-In the Raspberry Pi Imager, select the OS that you want to install and the SD card 
-you would like to install it on.
+.. warning::
+
+    Upgrading the Raspberry Pi OS to **Debian Bullseye** will cause some features to not work, so it is recommended to continue using the **Debian Buster** version.
+
+In the Raspberry Pi Imager, click **CHOOSE OS** -> **Raspberry Pi OS(other)**.
+
+.. image:: img/3d33.png
+    :align: center
+
+Scroll down to the end of the newly opened page and you will see **Raspberry Pi OS(Legacy)** and **Raspberry Pi OS Lite(Legacy)**, these are security updates for Debian Buster, the difference between them is with or without the desktop.
+It is recommended to install **Raspberry Pi OS(Legacy)**, the system with the desktop.
+
+.. image:: img/3d34.png
+    :align: center
 
-.. image:: img/image24.png
 
-.. note::
-    · You will need to be connected to the internet the first time.
-
-    · That OS will then be stored for future offline use(lastdownload.cache, C:\\Users\\yourname\\AppData\\Local\\Raspberry Pi\\Imager\\cache). So the next time you open the software, it will have the display "Released: date, cached on your computer".
-
-**Step 5**
 
 Select the SD card you are using.
 
-.. image:: img/image25.png
+.. image:: img/3d4.png
+  :width: 550
+  :align: center
+
+.. Press ``Ctrl+Shift+X`` to open the Advanced options page to enable SSH and configure wifi, these 2 items must be set, the others depend on your choice. You can choose to always use this image customization options.
+
+.. .. image:: img/3d5.png
+..   :width: 550
+..   :align: center
+
+.. Scroll down to configure the WiFi settings, and then click **SAVE**.
+
+.. .. note::
+
+..   The entry for the **WiFi country** should be set to a designated two-letter ISO/IEC alpha2 code designated to the country. Please reference the following link: `https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements <https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements>`_.
+
+.. .. image:: img/3d6.png
+..   :width: 550
+..   :align: center
+
+Click the **WRITE** button.
+
+.. image:: img/3d7.png
+  :width: 550
+  :align: center
+
+The Imager will overwrite any files already on the SD card. If the SD card has any files, back up these files before clicking Yes.
+
+.. image:: img/3d8.png
+  :width: 550
+  :align: center
+
+After the Imager completes installing the Operating System on the SD card, click Continue to complete the installation.
+
+.. image:: img/3d9.png
+  :width: 550
+  :align: center
+
+Now insert the Micro SD card with the system installed into the Raspberry Pi.
+
+
 
-**Step 6**
 
-Press **Ctrl+Shift+X** to open the **Advanced options** page to enable SSH and 
-configure wifi, these 2 items must be set, the others depend on your choice . You 
-can choose to always use this image customization options.
 
-.. image:: img/image26.png
 
-Then scroll down to complete the wifi configuration and click SAVE.
 
-.. note::
-    **wifi country** should be set the two-letter ISO/IEC alpha2 code for the 
-    country in which you are using your Raspberry Pi, please refer to the following link: https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements
 
-.. image:: img/image27.png
 
-**Step 7**
 
-Click the WRITE button.
 
-.. image:: img/image28.png
 
-**Step 8**
 
-If your SD card currently has any files on it, you may wish to back up these files first 
-to prevent you from permanently losing them. If there is no file to be backed up, 
-click **Yes**.
 
-.. image:: img/image29.png
 
-**Step 9**
 
-After waiting for a period of time, the following window will appear to represent the 
-completion of writing.
 
-.. image:: img/image30.png