Prototype Development: ESP32 QR Code Reader

I'm looking for a talented developer to help me create a prototype of a QR code reader using the ESP32 platform. The main purpose of this project is to activate a relay for access control. In addition, the system must be able to:

- Make queries to a database
- Transmit and receive data using RS485 communication protocol.

Key Requirements:
- Expertise with ESP32 platform
- Proficiency in developing QR code readers
- Experience with database querying
- Strong understanding of RS485 protocol
- Knowledge in access control systems
- Ability to build reliable, user-friendly prototypes.