I apologize, as my skills listed don't align perfectly with what you require for your ESP32-CAM stream control system design. While I do have extensive experience in web development and mobile development, primarily focusing on the MERN/MEAN stacks, I don't have specific experience with ESP32-CAMs, Modbus protocol, or relay boards.
I understand the peculiarities and challenges this project presents and I'm more than eager to learn and adapt to meet your project’s demand. My background in Python can facilitate a smooth transition and allows me quickly obtain a comprehensive understanding of your system's intricacies. With those skills and driven by a strong commitment to solution-oriented work, I am confident I could contribute to your project.
If you are willing to allow me this opportunity, my proven track record of delivering projects on time, within budget and at a quality that exceeds client expectations could be of significant value to you. Thank you for considering my pitch, I look forward to hearing from you and discussing how we can make your vision come true.