Advertising blurb:
The Aqara Roller Shade Driver E1* is a retrofit roller shade controller that does not require a complicated installation and can work with your existing Roller Shade by operating the beaded cord. It does not require dedicated wiring and can run both wirelessly from the built-in battery or being plugged into a power supply via the provided USB Type-C cable.
I have one of these and it is much better than the Zemismart motors I also have.
Be aware it is Zigbee so you will need a Zigbee coordinator to make it work. It also does not come with a separate physical remote control (the Zemismart can have a remote)
i have 7 of these, ask me anything.
i used to have basic tuya WiFi units that work very similarly to these aqara units. they would experience 'start and end point drift', whereby the upper and lower pre-set limit would drift after several successive open/close cycles. i am happy to confirm these units do not have this issue after now ~3 months of my ownership