MQTT Sensor

In this project, I utilized ESP32 and the HC-SR04 sensor to develop a streamlined system for remote data monitoring. By employing ESP-IDF over MQTT, the sensor readings are efficiently sent to a HiveMQ broker. This seamless integration allows for easy access and analysis of real-time data from remote locations, making it ideal for applications like environmental monitoring, industrial automation, and smart agriculture.

Requirements

Hardware

• ESP32 development kit
• Micro USB cable
• HC-SR04 ultrasonic sensor module
• Connecting wires

Software

• ESP-IDF v5

File Structure

sensor_to_mqtt/
└── components/
    └── mqtt_start/
    └── wifi_start/
└── main/
    ├── CMakeLists.txt
    ├── sensor_to_mqtt.c
└── CMakeLists.txt
└── sdkconfig
    

Building

• Open sensor_to_mqtt in cmd
• Run export.bat to set up ESP-IDF environment
• Add details to files such as Wi-Fi SSID, password, mqtt broker username, password, uri etc.
• Make sure to connect esp32 to your PC and sensor to pins as provided in code.
• Run
  idf.py build flash monitor

Documentation

• esp-wifi
• esp-mqtt
• esp-tls
• esp-gpio
• FreeRTOS
• HiveMQ

Thank You!