Call alert is a simple device using servo to tell users when there is a phone call coming in. I connected it to particle function so that users can decide the range and time of the vibrations according to their needs.
For next steps I want to learn how to connect it to real phone call, maybe start by exploring the IFTTT function. I also want to try if I can use different vibration modes to indicate that a specific person is calling in, so we'd better answer it ASAP!
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