CEM40/GEM45 Firmware

Firmware for CEM40 and GEM45 Mount (2/22/2024)

No firmware upgrade is needed if your mount works properly. However, the latest firmware will be needed for latest iOptron Commander.

Please read the Release Notes before performing any firmware upgrades. Follow the Upgrade Instruction carefully. Loading the wrong file into the system may cause the mount inoperable!


Encoder calibration is needed for a mount with a high precision encoder (EC version) after the firmware upgrade.


For a CEM40/GEM45 mount with 8407 hand controller:
CEM40/GEM45 Firmware Upgrade History
CEM40/GEM45 w/8407 firmware upgrade instruction
FTDI VCP Driver for Win7/8.1/10, FTDI VCP Driver for Win11, or go to FTDI Chip website to download the VCP driver
iOptron Upgrade Utility (V2.23, released 11/1/2022)
CEM40/GEM45 Firmware Package (including 8410 hand controller) (V230305)
Go2Nova 8407 hand controller firmware (V20210420)


For a CEM40/GEM45 mount with 8410 hand controller:
CEM40/GEM45 Firmware Upgrade History
CEM40/GEM45 w/8410 firmware upgrade instruction
FTDI VCP Driver for Win7/8.1/10, FTDI VCP Driver for Win11, or go to FTDI Chip website to download the VCP driver
iOptron Upgrade Utility (V2.23, released 11/1/2022)
CEM40/GEM45 Firmware Package (including 8410 hand controller) (V230305)