I'm trying to create an app which is gonna receive a sound flux from an arduino. Arduino is linked with a microphone to hear if a baby is crying. When the baby is crying, you receive a notification then in the app you can decide to hear what the microphone is recording. I know how to do everything, except how to program the 'If the baby is crying'. Can you help me ?
Currently there is no sound sensor in app inventor so you won't be able to detect when a baby is crying.
Arduino receives analog signals from the microphone, so what you have to do is map the analog signal to a digital signal, then, you can evaluate it.
Here's something similar to detect audio with an Arduino.
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