ESP32-Based Review System

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/

Hardware

1. ESP32 Microcontroller:
2. Acts as the central unit for the system, handling input and Wi-Fi communication.
3. Offers built-in support for touch-sensitive inputs and connectivity.
4. Touch Switches (4):
5. Represent the feedback options (e.g., Excellent, Good, Average, Poor).
6. Capacitive touch sensors provide a modern and seamless input method.
7. Power Supply:
8. A 5V or battery-based supply for portability.
9. Enclosure:
10. Protects the hardware and offers an ergonomic design for user interaction.

Server

1. A centralized server to store, manage, and analyze feedback data.
2. The server can be hosted locally or in the cloud, depending on scalability needs.

Display (Optional):

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

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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.

Input:

1. The 4 touch switches allow customers to provide feedback by simply touching the respective button.
2. Example:
3. Touch 1: Excellent
4. Touch 2: Good
5. Touch 3: Average
6. Touch 4: Poor

Processing:

1. The ESP32 detects the touch input using its capacitive sensing GPIO pins.
2. Each input corresponds to a predefined rating, which is mapped internally in the program.

Transmission:

1. The ESP32 sends the feedback data (e.g., rating, timestamp, location) to the server via Wi-Fi.
2. Data is transmitted using standard communication protocols like HTTP or MQTT.

Data Storage:

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

Analysis:

1. Data visualization tools or dashboards (e.g., Power BI, Grafana, or a custom web application) are used to:
2. Identify trends (e.g., most common feedback).
3. Pinpoint issues (e.g., consistently poor ratings from a specific location).
4. Generate reports for management

Key Features

Real-Time Feedback Collection:

1. Feedback is instantly transmitted to the server.

Touch-Based Input:

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

Wireless Connectivity:

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

Data Security:

1. Feedback data can be encrypted during transmission for security.

Scalability:

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

Retail Stores:

1. Customers provide feedback on their shopping experience.

Restaurants:

1. Guests rate their dining experience at the exit.

Service Centers:

1. Clients evaluate the service quality after their visit.

Public Events:

1. Attendees rate their satisfaction with the event organization
2. Attendees rate their satisfaction with the event organization

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Challenges and Solutions

Challenge: Wi-Fi Connectivity Issues

1. Solution: Use fallback mechanisms like local storage to temporarily store data if Wi-Fi is unavailable.

Challenge: Accidental Touch Inputs

1. Solution: Add a debounce mechanism in the code to filter out unintended inputs.

Challenge: Data Privacy

1. Solution: Implement encryption for data transmission and access control on the server

For full project:

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