You can see the instructions for this connection using this instruction link
The Amazon Echo Flex and Philips Hue Smart Dimmer Switch can communicate with each other using a bridge. This bridge is necessary because there is no shared connection between the two devices.
With the Philips Hue Smart Hub, The Philips Hue Smart Dimmer Switch's Wi-Fi can connect to the bridge, and the bridge can connect to the Zigbee connection of the Philips Hue Smart Dimmer Switch. The Philips Hue Smart Hub also has Amazon Alexa compatibility, ensuring the connection can be made.
Another compatiblity is to use the connections between the third party Samsung SmartThings Hub 3rd Generation with the Philips Hue Smart Dimmer Switch. This method can use the bridge to connect to the Zigbee connection of the Philips Hue Smart Dimmer Switch. The Samsung SmartThings Hub 3rd Generation also has Amazon Alexa compatibility, allowing all of the devices to communicate to each other.
Interface Compatibility
 Amazon Echo Flex |
 Philips Hue Smart Hub * Bridge required |
 Philips Hue Smart Dimmer Switch |
|
|---|---|---|---|
| Amazon Alexa | Yes | Yes | Yes |
| Apple HomeKit | No | Yes | No |
| Google Assistant | No | Yes | No |
Connection Compatibility
|
Amazon Echo Flex |
Philips Hue Smart Hub * Bridge required |
Philips Hue Smart Dimmer Switch |
|
|---|---|---|---|
| Amazon Sidewalk | No | No | No |
| Bluetooth | Yes | No | No |
| Clear Connect | No | No | No |
| Thread | No | No | No |
| Wi-Fi | Yes | Yes | No |
| Z-Wave | No | No | No |
| Zigbee | No | Yes | Yes |