Hello there,
I read your project description. I am an entrepreneur in Turkey in the field of IoT. On the vending machine side, I completed all the processes of the Telemetry device such as motherboard electronic circuit design, processor selection, embedded software development, sensor usage, and high-end software development. I have 5 years of experience in IoT. I can mentor you in your project and support you in this process, such as circuit element selection, software architecture, software design, which turns from an idea to a product. You can check my skills on my profile and at e-vend.com.tr. Waiting for you to start a chat for details.
Kind regards