You can easily water your plants using IOT with the Soil moisture sensor
This is a very simple project, were the main idea is to explore how to control servos via internet using NodeMCU and Blynk.
If you want a NodeMCU device that could help you to control all your house electrical devices, then this will be your best guide
Control your robot from a Wi-Fi network using an ESP8266 Wemos D1, Arduino IDE and Blynk App!
A smart iot outlet controlled by Google assistant, learn how to connect blynk with ifttt
CaRo is a cable robot that enables easy and cost-effective entry into programming and robotics.
I created a raspberry pi remote-controlled car using Blynk.
Human detection Security System Using IOT
Through this tutorial I made fire alarm notification System Using Iot technology. wherever you are in the world you can get the notification