There are many IoT clouds available to store and monitor the data from various sensors. With increasing popularity of IoT, more number of sensors are used every day and these sensors produce anonymous data which are useful to control other devices on the IoT network. These data can be studied further and used to modify design or improve the system performance. The Applications of Data Logging is vast and can be applied in Research Centres, Scientific Labs, Operation Theatres, Patient Monitoring System and many more.
Check out this useful DIY IoT tutorial: https://circuitdigest.com/microcontroller-projects/log-temperature-sensor-data-to-google-sheet-using-nodemcu-esp8266
Interfacing OLED Display with NodeMCU ESP8266
In this tutorial we will use SPI protocol to interface Monochrome 7-pin SSD1306 0.96 OLED Display with NodeMCUand will learn to display image on OLED screen with NodeMCU ESP8266.
Find the project here: https://circuitdigest.com/microcontroller-projects/interfacing-ssd1306-oled-display-with-esp8266-nodemcu
How to Build NodeMCU Webserver and control an LED from a Webpage
To take you one step ahead towards IoT development, today we will make our own web server to host a webpage and control any appliance remotely from anywhere in the world. Here we will use ESP12E NodeMCU as webserver, although any ESP module can be used here. Learn more about various ESP modules and their projects here.
DIY Wi-Fi Jammer using NodeMCU ESP12
There is a Wi-Fi protocol called 802.11 which act as a deauthentication frame. This is used to safely disconnect all the users connected with the router. To disconnect any device from some Wi-Fi network, it is not important to know the password or to be in the network, you just need mac address of the Wi-Fi router and client device and it is enough to be in its range of that Wi-Fi network.
Find here the complete DIY tutorial: https://circuitdigest.com/microcontroller-projects/diy-wifi-jammer-using-nodemcu-esp12
ESP32 Internet Clock
To minimize hardware requirements we will make Internet clock without using RTC module. This is more accurate as compare to RTC clock. ESP32 is a Wi-Fi module and can be easily connected to the internet so we will use NTP (Network Time Protocol) and UDP (User Datagram Protocol) to fetch Time from the internet using Wi-Fi.
Check the complete project here: https://circuitdigest.com/microcontroller-projects/esp32-internet-clock