Introduction

The ESP32-based review system is a hardware and software solution designed to gather customer feedback efficiently, transmit it to a server, and analyze the data to improve customer satisfaction.

For Full Project:

https://electronicsworkshops.com/2024/11/13/esp32-based-review-system/

System Components

Hardware

ESP32 Microcontroller:

Acts as the central unit for the system, handling input and Wi-Fi communication.

Offers built-in support for touch-sensitive inputs and connectivity.

Touch Switches (4):

Represent the feedback options (e.g., Excellent, Good, Average, Poor).

Capacitive touch sensors provide a modern and seamless input method.

Power Supply:

A 5V or battery-based supply for portability.

Enclosure:

Protects the hardware and offers an ergonomic design for user interaction.

Server

A centralized server to store, manage, and analyze feedback data.

The server can be hosted locally or in the cloud, depending on scalability needs.

Display (Optional):

An OLED or LCD screen to show a confirmation message after the customer provides feedback.

PCB Manufacturer

PCBWAY is a highly skilled company specializing in PCB manufacturing. They offer their services at incredibly low prices, such as providing 10 PCBs for only $5. Additionally, new members receive a $5 bonus. The website allows customers to upload their Gerber Files and place orders.

ORDER LINK

PCBWAY is known for producing PCBs of exceptional quality and maintaining high standards, which is why many people trust them for their PCB and PCBA needs.

Below are some of my PCB’S manufactured by PCBWAY and I am fully satisfied by their Quality of service they provide.

Working Mechanism

Input:

The 4 touch switches allow customers to provide feedback by simply touching the respective button.

Example:

Touch 1: Excellent

Touch 2: Good

Touch 3: Average

Touch 4: Poor

Processing:

The ESP32 detects the touch input using its capacitive sensing GPIO pins.

Each input corresponds to a predefined rating, which is mapped internally in the program.

Transmission:

The ESP32 sends the feedback data (e.g., rating, timestamp, location) to the server via Wi-Fi.

Data is transmitted using standard communication protocols like HTTP or MQTT.

Data Storage:

The server stores the feedback in a database (e.g., MySQL, Firebase, or NoSQL databases like MongoDB).

Analysis:

Data visualization tools or dashboards (e.g., Power BI, Grafana, or a custom web application) are used to:

Identify trends (e.g., most common feedback).

Pinpoint issues (e.g., consistently poor ratings from a specific location).

Generate reports for management

Key Features

Real-Time Feedback Collection:

Feedback is instantly transmitted to the server.

Touch-Based Input:

Modern and user-friendly, with no need for physical buttons.

Wireless Connectivity:

Leverages the ESP32’s Wi-Fi capabilities for seamless communication.

Data Security:

Feedback data can be encrypted during transmission for security.

Scalability:

Multiple ESP32 devices can connect to the same server from different locations

Enclosure Design

Design 1

Design 2

Example Use Cases

Retail Stores:

Customers provide feedback on their shopping experience.

Restaurants:

Guests rate their dining experience at the exit.

Service Centers:

Clients evaluate the service quality after their visit.

Public Events:

Attendees rate their satisfaction with the event organization

Attendees rate their satisfaction with the event organization

For Full Project:

https://electronicsworkshops.com/2024/11/13/esp32-based-review-system/