The simplest project in Arduino that one could learn is to control the on-board LED via Blynk app.
Project tutorial by Vijay Shreenivos
This project uses an Arduino, a drawn keyboard using lead pencil, a paper, and a speaker.
Project showcase by Ikhsan Ismail
By using IFTTT, the Google Assistant API, and a Particle Photon, you can make a machine that gives out candy upon your request!
Project tutorial by Arduino “having11” Guy
Control an Arduino robot with Twitter and the OneSheeld.
by Barnabas Nomo
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