...One day as I plugged my phone to charge I “heard” the notification sound. Wearing a huge smile on my face I plugged and unplugged my phone for 5 minutes, listening to the beep of the charging notification. I had realized my phone could monitor the state of power of an electrical outlet and as a bonus it was connected to the internet. I rushed out to buy a very cheap android phone and set to work coding. A few days later my first IoT sensor was ready.