How to Upgrade Hand Control Firmware - NexStar+ and StarSense
To update the hand control firmware, you will need the Celestron Firmware Manager (referred to as CFM for the rest of this document) from Celestron's web site:
CFM uses Java (download the latest from www.java.com) to work on Windows, macOS and Linux.
Updating your scope also requires a connection between the port on the bottom of the hand control and your PC or laptop.
The current NexStar+ and StarSense hand controls (all those manufactured since April 2016) have a USB port on the bottom for connections to a PC/laptop. This port is actually a connection to a USB to serial adapter inside the hand control. For details on the cable required, read this. You must connect this cable between a USB port on your computer and the port on the bottom of the hand control. You will also need to load a driver, read this for more information.
NexStar+ and StarSense hand controls manufactured prior to April 2016 have an RS-232 port (looks like a phone jack). You will need the Hand Control RS-232 Port Cable that plugs into the bottom of the hand control. For details on the cable and sources to purchase one, read this. You must connect this cable between a serial port on your computer and the port on the bottom of the hand control. If your PC does not have a serial port, you will need a USB-to-serial adapter available at most computer stores. See PC Control on this website for more information and options regarding computers without a serial port.
Alternately, if your scope has Celestron WiFi (built-in on the Evolution and Astro Fi, available as an add on for many mounts by using the Celestron SkyPortal or SkyQ Link WiFi module), you can connect your PC to the scope's WiFi network and connect without cables. This requires you to change the connection method in CFM's Options/Connections menu to WiFi.
After downloading CFM, you must then "unzip" or "extract" it to a folder on your computer. Don't lose track of the location of this folder as you will need to navigate to it to start CFM later.