After pairing successfully, my devices started flashing rapidly again.
Your devices have returned to their setup mode, they were reset. Turn off lights for 20 seconds and they will automatically go back to last settings. Factors that can trigger reset mode: short-term loss of electrical power, due to a power failure or sometimes playing too rapidly with the on/off electrical switch.
After installing my smart switch nothing is working.
Important! The switch must be installed by a certified electrician. For installation there are many requirements. The smart switch only supports one way/single pole circuit, it is not compatible with 3-way switch and a neutral wire is required and cannot be connected to any switch wires.
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