Old post but in case someone like me comes looking these posts by @dandanache really helped me with these (and many other) devices.
This post deals has drivers for a LOT of Ikea devices including the E1746 Zigbee repeaters: [RELEASE] IKEA Zigbee drivers
And this one explains how to update most of these devices natively using the Hubitat hub: [GUIDE] IKEA Firmware Updates
All thanks to @dandanache and the good people at Ikea and HE!
