IoT, Computer Science, Software Architecture, Messaging, Esp32.
https://medium.com/@knowledgeshark/put-the-cable-candle-back-a313ef74ce68 How will this be accomplished when 40–50 billion devices are active? Imagine walking down a random isle of a quaint shopping boutique, when your smart phone beeps or vibrates. It’s letting you know that a rare item you have