Finally, I need an analog soil moisture sensor so that I can monitor the soil moisture, and based on that, I can switch on/off the water pump remotely through the Blynk app. The below block diagram ...

Enables autonomous driving of a 2 or 4 wheel car with an Arduino and a Adafruit Motor Shield V2. To avoid obstacles a HC-SR04 Ultrasonic sensor mounted on a SG90 Servo continuously scans the area.

A JSN-SR04T ultrasonic sensor, connected to an ESP8266 to calculate the water level in a water tank. Water level monitor using open-source microcontrollers (Arduino, ESP8266, ESP32) and ultrasonic ...