“It’s amazing how quickly you can put together an IoT protect using a NodeMCU and a Blynk app. On this tutorial we will learn about a great, reliable and easy to use digital temperature sensor, the DS18B20. Also as shown at above block diagram, the collected data from the sensor will be upload to internet with a help of a NodeMCU ESP8266-E and monitored on a Smart device using the Blynk app.”