Advancing Connectivity with Cavli C16QS Module Integration
Category : Network and Communication | Sub Category : Posted on 2024-01-18 17:34:19
Introduction
We are thrilled to present our latest project aimed at enhancing the connectivity and functionality of the Level 1 EV charger for our esteemed client, Bolt Earth. This blog delves into how the integration of the advanced Cavli C16QS GSM module has significantly improved our commitment to driving innovation and empowering seamless IoT connectivity for Bolt Earth's charging solutions.
Problem Statement: Challenges with Connectivity in Level 1 Chargers
The primary challenge lies in the lack of a reliable method for Level 1 (3.3kW AC) Chargers to connect to the cloud using a SIM-based GSM module. Traditional solutions like Wi-Fi, while reliable in certain settings, fall short of meeting the remote functionality required by our client. This issue poses a significant obstacle to the client's ability to monitor and control the charger remotely. The integration of the Cavli C16QS GSM Module with the charger is essential for enhancing its functionality and user experience. This is a critical requirement for effective decision-making and operational efficiency.
The Cavli C16QS: Revolutionizing IoT Connectivity
The Cavli C16QS is an innovative LTE Cat 1. bis module, meticulously designed for IoT and M2M applications. Compliant with 3GPP release 14 specifications, this module offers exceptional support for integrated GNSS, making it an ideal choice for location-tracking applications. With the option of an integrated eSIM, it enables global connectivity through the Cavli Hubble Device and connectivity management platform.
This module represents a significant leap forward for IoT solution makers seeking to transition from legacy 2G and 3G solutions to LTE. Its enhanced tracking features, independent LTE and GNSS power supply and sleep features, and low power modes make it ideal for applications such as asset tracking, POS (point of sale), remote monitoring, and energy metering. Available in region-specific variants, the C16QS maintains pin compatibility with Cavli C42GM and C42QM modules, ensuring flexibility and ease of integration.
Furthermore, the Cavli C16QS module stands out for its affordability, making advanced IoT connectivity accessible to a broader range of users and applications. It also offers the option of an integrated eSIM, enabling global connectivity through the Cavli Hubble Device and connectivity management platform, further enhancing its versatility and user-friendliness.
In conclusion, the Cavli C16QS module represents a significant advancement in IoT technology, offering a powerful, flexible, and cost-effective solution for a wide range of applications.
eSIM: The Future of Mobile Connectivity
eSIM (Embedded Subscriber Identity Module) technology is transforming the way we connect to mobile networks. This digital SIM card, embedded within a device, eliminates the need for a physical SIM card, offering numerous advantages and opening new possibilities for mobile communication.
Functionality and Advantages: eSIM performs the same functions as a traditional SIM card, enabling mobile communication and identification on cellular networks. It securely stores subscriber information, such as network credentials and user identity. The primary advantages of eSIM include space-saving, flexibility, remote provisioning, and support for multiple profiles on a single eSIM.
Use Cases: eSIM technology has a wide range of applications, including smartphones, connected devices, wearables, and IoT devices. It simplifies device setup, facilitates seamless network transitions, and enables global roaming without the need for physical SIM changes.
Security: eSIMs are designed with robust security features to protect user information and prevent unauthorized access. Encryption and authentication protocols ensure secure communication, safeguarding user data and privacy.
Standardization: The GSMA (Global System for Mobile Communications Association) has defined standards for eSIM technology, promoting interoperability and compatibility across devices and networks. This standardization ensures seamless adoption and integration of eSIM technology.
Challenges: Despite its advantages, eSIM technology faces certain challenges. Adoption is still in progress, and compatibility issues with older devices and networks remain. Additionally, regulatory hurdles in some regions may impact the implementation of eSIM technology.
Future Trends: The future of eSIM technology looks promising. Continued integration into a wide range of devices, increased support from mobile carriers, and ongoing standardization efforts are expected to drive widespread adoption. eSIM is poised to revolutionize mobile connectivity, offering greater convenience, flexibility, and security.
Advancing Connectivity for Bolt Earth
We are currently engaged in a project to enhance the connectivity and functionality of our Level 1 chargers for our esteemed client, Bolt Earth. This is being achieved through the integration of an advanced piece of technology, the Cavli C16QS module. This LTE modem enables internet connectivity via cellular networks, marking a significant upgrade from the previous Wi-Fi connectivity.
Project Objective
The primary goal of this project is to design and develop a custom GSM board using the Cavli C16QS module and integrate it with the Level 1 (3.3kW AC) Chargers. This will facilitate users to establish a connection to the cloud using the SIM-based GSM module.
Hardware Features of the Custom Cavli C16QS Board
Our team has meticulously designed a custom board featuring the Cavli C16QS module, with the following key hardware characteristics:
Power Supply Circuit: The board is equipped with a power supply circuit that delivers a 3.7V output, capable of supporting up to 3A of continuous current.
Auto-Start Functionality: The board is designed to automatically start when power is supplied, enhancing its operational efficiency.
POWERKEY Pin: A POWERKEY pin is incorporated on the module board, controlled by a GPIO pin of the Microcontroller, providing enhanced control over the module’s operations.
Micro-SIM Card Slot: The board features a single micro-SIM card slot, facilitating cellular connectivity.
Antenna Connector: The board includes one antenna connector for the main GSM Antenna, ensuring optimal signal reception and transmission.
Interface Options: The board is designed with UART interface, providing versatile connectivity options.
Status Indicators: Two LEDs are incorporated into the board design for power and module status indication, providing visual feedback on the board’s operational status.
Reset Switch: The board features a reset switch for updating the GSM module firmware, ensuring the module can be easily updated to the latest firmware versions.
This custom board design underscores our commitment to delivering robust, efficient, and versatile solutions for IoT connectivity.
Firmware Features
The firmware features of this project include:
Driver Development: We have developed a driver file that integrates the Cavli C16QS module with the ESP32. This was achieved by utilizing the ESPs internal API to initiate communication with the 4G LTE module using corresponding AT commands.
Internet Connectivity: We have used the Point-to-Point Protocol (PPP) to establish internet connectivity, enhancing the functionality of the ESP32 with the Cavli C16QS module
Cloud Connection Establishment and Communication: We have established a connection with the designated MQTT broker using the ESP-MQTT client. Our communication protocol ensures robust, reliable, and dependable connections. We have also implemented measures to handle any failures during connection establishment and sessions accordingly.
Firmware Over-The-Air (FOTA): We are developing Firmware OTA using the 4G LTE module. This process will be facilitated using an ESP-HTTPS-OTA API, enabling a secure HTTPS connection to the cloud server. The updated firmware will be downloaded from the server, and the upgrade will be executed seamlessly.
Challenges Faced
During the firmware integration process, we encountered specific challenges related to establishing Internet connectivity using PPP. One notable hurdle was the need for a particular AT command flow to ensure a seamless connection between the ESP32 and the Cavli C16QS module.
The intricacies of PPP implementation required careful consideration of the command sequence to initiate and maintain a reliable data link layer protocol. Understanding the nuances of this AT command flow became crucial for successful Internet connectivity. This involved meticulous testing and debugging to fine-tune the commands, ensuring they align with the PPP protocol standards and comply with the requirements of both the ESP32 and the Cavli C16QS module.
Navigating through this challenge demanded a deep understanding of the PPP protocol, AT command specifications, and the interplay between the ESP32 and the LTE module. Through thorough investigation and collaboration between hardware and firmware teams, we successfully overcame this challenge, resulting in a robust implementation of Internet connectivity using PPP. The experience gained during this process has further enriched our knowledge base and fortified the firmware integration for a more reliable and efficient IoT system.
As we continue to enhance our firmware capabilities, we remain committed to delivering solutions that meet and exceed the evolving needs of IoT connectivity.
Conclusion
This project demonstrates our commitment to innovation through advanced technology integration. We look forward to continuing to provide solutions to meet Bolt Earth s needs. Thank you for learning about our work enhancing connectivity with the Cavli C16QS module.
For inquiries regarding the development of a Gstream solution, please contact us at info@inthings.tech today.
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