As a seasoned Electronics and Mechatronics Engineer, with extensive experience in the fields of IoT, embedded systems, and even complex telephony systems like Asterisk, I strongly believe I'm an ideal fit for your Raspberry Pi 4 video-doorbell project. Building upon my proficiency in programming Python and C++, my robust understanding of Raspberry Pi4 operations, Video streaming, and integration with Hardware Sensors will allow me to provide efficient code for your automatic video calling requirement.
I've read through your detailed project description meticulously, and I'm fully aware of the problems you've faced so far, as well as the critical need for VIDEO calling automation. Over the years, I've garnered expertise in successful automation of similar functionalities that involve GPIO integrations through my past projects involving NodeRed and other platforms.
Furthermore, having worked extensively with USB web cameras alongside Raspberry Pis for video calling projects, I've developed a profound understanding of maximizing their potential. So, if given this opportunity I assure you that not only will we achieve automatic video-call functionality on your video-doorbell but with seamless integration ensuring smooth operation from Android application till physical door