@genesisv, thanks for detailed write up and continued support of the project.
- Indeed there can be a moment of non-responsiveness while the phone is switching between the cellular data and WiFi connection.
- The servers don’t add much to the latency; as you pointed out there is not much delay when you use Alexa/IFTTT, yet they’re also sending their commands through the cloud. The issue is likely to do with the phone’s connectivity and the app.
- Please check out the web app - I just keep it in one of the browser’s tabs. If you prefer, you can even add it as an icon to your home screen. There’s also an updated version of app in the works. You’re welcome to join the testing and provide your feedback.