Launch the Alexa app and tap the drawer button in the upper left corner
Tap Smart Home
Tap Get More Smart Home Skills
Select Insteon from the list of Smart Home Skills
To connect your Insteon Hub to your Amazon Echo, you will need to enter your Insteon account user name and password. When finished, tap Sign In.
After you see confirmation that Alexa has been linked with your Insteon Hub, tap the close button in the upper right corner.
After connecting your account, you will be prompted to discover devices.
After a few moments, you will see a list of all of the Insteon devices connected to your Insteon Hub. You can now control these devices from your Amazon Echo.
If you add new Insteon devices at a later date, Echo will automatically search for devices every hour. To discover a device more quickly, say "Alexa, discover my devices."