Building an ESP32-based Bluetooth Soil Moisture Sensor involves creating both the firmware for the ESP32 and a mobile app (APK) to display the sensor values on a mobile device. Below is a basic example using Arduino for ESP32 and MIT App Inventor for the mobile app.

Below is a simple example code for an IoT-based Saline Bottle Level Monitoring System using a load cell, ESP32 module, and real-time data visualization through a web browser. The system also includes a threshold setting for weight reduction and generates a beep sound when the threshold is crossed. This example uses WebSocket for real-time communication between the ESP32 and a web browser.

Building an IoT-based Saline Bottle Level Monitoring System using a load cell, Arduino, and GPRS module is an interesting project. Here's a step-by-step guide to help you get started: