Add documentation on updating a PandA through the web interface

docs/how-to/remote.rst

@@ -4,7 +4,7 @@ Updating a PandA via SSH
 ========================
 
 The Admin interface of the PandA can be used to update the firmware as detailed
-in the quickstart_doc_, but sometimes it is necessary to update a number of
+in the _web_doc, but sometimes it is necessary to update a number of
 PandAs at once. The SSH interface can be used to do this.
 
 To gain access over SSH, either add an ``authorized_keys`` file to the SD card,
@@ -21,8 +21,6 @@ It is then possible to log in remotely and perform operations on the PandA.
 First update rootfs and then, after a reboot, update to the latest available zpkg 
 packages (while making sure to match the major versions of everything).
 
-.. _quickstart_doc: https://pandablocks.github.io/PandABlocks-rootfs/master/quickstart.html
-
 Updating the rootfs
 -------------------
 

docs/how-to/web-interface.rst

@@ -0,0 +1,57 @@
+.. _web_doc:
+
+Updating a PandA via web interface
+==================================
+
+To update the firmware installed on a PandA, it is recommended to use the Web Admin
+interface. To do this you will need physical access to the PandA and a USB memory 
+stick with the new firmware copied onto it. You can find the latest firmware from
+GitHub_.
+
+Information about updating a PandA by SSH can be found in the _ssh_doc.
+
+The Web Interface of a PandA is accessible by typing its ip address or hostname into
+a browser.
+
+
+Updating the rootfs
+-------------------
+
+On the Web Admin interface, Navigate to Admin on the bottom banner. You will then be
+able to read your current Version information.
+
+On a memory stick you will need the ``boot-x.x.zip``  file from GitHub_. There is no
+need to unzip it.
+
+.. note::
+    If your current rootfs version is less than 2.1 you will need to unzip the file
+    and select to install ``imagefile.cpio.gz``.
+
+With a prepared USB memory stick inserted in the USB slot in the back of a PandA, 
+navigate to Packages under Admin Commands and then Install Rootfs from USB. You can
+select your zip file from the list and follow the on screen instructions to install
+your new version of the rootfs.
+
+.. note::
+    If you are installing a major upgrade to the rootfs, it is recommended to 
+    uninstall all the installed zpkgs before upgrading the rootfs. For PandA v3.1 an
+    option is available to do this as part of the rootfs install.
+
+You can power cycle the box and it will install the new rootfs.
+
+
+Updating zpkg packages
+----------------------
+
+A PandA firmware installation consists of 4 Zpkgs:
+    - panda-fpga\@*.zpg
+    - panda-server\@*.zpg
+    - panda-webcontrol\@*.zpg
+    - panda-slowfpga\@*.zpg (PandA 3.0 onwards)
+
+Download new zpkg files from GitHub_, and add them to the USB memory stick. Navigate
+to Packages under Admin Commands and then Install Packages from USB. You can select
+which zpkgs from the USB stick you will want to install.
+
+
+.. _GitHub: https://github.com/PandABlocks/PandABlocks.github.io/releases