CEM120 Firmware

Firmware for a CEM120 Mount(5/23/2023)

No firmware upgrade is needed if your mount works properly.

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.

CEM120 Firmware Upgrade History
iOptron Upgrade Utility 2.23 (latest version)
FTDI VCP Driver, or go to FTDI Chip website to download the VCP driver

If you have a CEM120 mount with an 8410 hand controller, the 8410HC firmware will be upgraded via the mount connection.
CEM120 w/8410 HC firmware upgrade instruction
CEM120 Firmware Package (include 8410 hand controller) (V230305)

If you have a CEM120 mount with a 8407 hand controller, you'll need to upgrade the mount firmware and hand controller firmware separately, as described in the Upgrade Instruction.
CEM120 w/8407HC firmware upgrade instruction
CEM120 Firmware Package (include 8410 hand controller) (V230305)
Go2Nova 8407 hand controller firmware (V20210420)

Archived Firmware