ARKSOFT » Smart IoT Parking Lock with 4G and Bluetooth Compatibility

Project Overview

This advanced parking lock solution is designed to streamline parking access and management with innovative IoT features, durable hardware, and remote control options. Built with reliable connectivity and ruggedized for outdoor environments, it provides users with convenience and flexibility through both a web interface and mobile app. This smart parking lock incorporates leading-edge features such as real-time position detection, robust motor control, and seamless over-the-air (OTA) updates, ensuring optimal performance and ease of maintenance.

Hardware Design

PCB Design:
- A custom-designed PCB integrates the Nordic nRF51820 Bluetooth-compatible CPU and the SIM7600 4G chipset, achieving compactness and optimal signal quality for wireless communication.
- Designed for minimal power consumption to extend battery life while maintaining consistent performance, the PCB layout ensures efficient heat dissipation and signal integrity.
Core Components:
- Microcontroller (Nordic nRF51820): A Bluetooth-enabled CPU, providing low-latency communication and control over local device functions. With ARM Cortex-M0 capabilities, it manages device functionality while balancing power and performance.
- SIM7600 4G Module: Ensures stable and high-speed connectivity to cloud servers, enabling real-time remote control and data access.
- Motor and Position Sensing Circuitry:
  - Current-based position detection senses the arm's precise location, while the motor control circuit enables smooth, reliable arm movement with low noise and minimal wear.
  - The circuit design includes a feedback loop to allow for quick error detection and correction, enhancing stability in variable conditions.
Weatherproof and Durable Enclosure:
- The IP68-rated enclosure provides complete protection against dust, rain, and submersion in water, making it suitable for outdoor applications.
- The lock is engineered with corrosion-resistant materials and UV-resistant coatings to prevent degradation, ensuring long-term durability.
- The mechanical design incorporates shock-absorbing elements to handle repetitive operations, heavy loads, and resist vandalism.

Firmware Features

Real-Time Operating System (RTOS):
- The firmware is powered by an RTOS to enable effective multitasking, ensuring smooth coordination between connectivity, motor control, and OTA updates.
- RTOS support allows for low-power operation modes, optimizing battery life during idle periods.

Ultrasonic sensor driving integration:
- Integrated ultrasonic sensors provide real-time detection of vehicle presence, ensuring accurate operational control. This feature prevents unauthorized access, allowing the lock to remain closed unless a vehicle is detected, and aids in efficient space management.
- The ultrasonic detection code is optimized for quick responsiveness and minimal power draw, contributing to the device's operational efficiency.

SIM7600 AT Command Integration:
- Full integration of SIM7600 AT command sets allows the lock to control network connectivity, data transfer, and error handling autonomously.
- Commands are optimized to reduce response time and improve connection reliability, even in low-signal conditions.

Motor Control and Position Detection:
- Precise control algorithms enable efficient motor operation, reducing wear and energy consumption while ensuring accurate positioning of the lock’s arm.
- Position detection circuits provide real-time feedback, allowing for automatic adjustments if unexpected obstacles are detected.

Over-the-Air (OTA) Firmware Updates:
- The firmware can be remotely updated via a 4G connection, allowing users to receive new features, security patches, and performance improvements without physical access to the device.
- OTA updates are encrypted to prevent unauthorized access, ensuring the device’s security and integrity.

Software and Cloud Integration

Cloud-Based Socket Server:
- A robust, cloud-based socket server enables real-time communication with multiple locks simultaneously, providing centralized management and control.
- The server is capable of scaling horizontally to support additional devices, making it adaptable to growing networks of parking locks.
User Interfaces:
- Web Interface: Accessible via browser, the web interface allows users to unlock and configure their parking locks, view device status, and schedule updates.
- Android App: The mobile app offers a similar experience on smartphones, with Bluetooth connectivity as an alternative to 4G for local control, which can be especially useful when cellular connectivity is limited.

Use Cases and Market Applications

Smart Parking Management: Ideal for smart city projects, the lock system can be deployed in both public and private parking spaces, making it suitable for municipalities, commercial facilities, and gated communities.
Remote Monitoring and Maintenance: The OTA update and cloud management capabilities ensure seamless maintenance, reducing the need for on-site servicing.
Enhanced Security: With encrypted OTA updates and position detection, the device is safeguarded against unauthorized access and potential tampering.