CEM26/GEM28 Firmware

Firmware for CEM26 and GEM28 Mount (April 10,2021)

Please read the Release Notes before performing any firmware upgrades. Loading the wrong file into the mainboard may cause the system to become inoperable!


Please set the mount to zero position by using Set Zero Position after firmware upgrade.

CEM26EC and GEM28EC version needs to perform encoder calibration after the firmware upgrade.


CEM26/GEM28 firmware upgrade instruction
iOptron Upgrade Utility V2.11
CEM26/GEM28 Firmware Package (incl. 8409 HC) (V210105)
FTDI VCP Driver, or go to FTDI Chip website to download the VCP driver
CEM26/GEM28 Firmware Upgrade History