The C204/C-ZB-DM204 module is compatible with HomeKit, when used with Philips Hue. The C203 module is currently incompatible with HomeKit, and an upgrade is coming soon.
Getting Started with your Candeo Zigbee Dimming Module Download the Instruction Manual here: C203 and C-ZB-DM204 (C204) Instruction Manual Wiring Instructions Please see our wiring article: C203 and C-ZB-DM204 (C204) wiring Installation Instructions ...
Adjust the brightness to the desired minimum level using your smart controller app. This is typically the lowest level possible where a dim glow is visible without any flickering. Press and hold the Min Set button on the module for 3 seconds ...