Hello.
Greetings of Peace.
I have great experience in developing custom electronics systems. I have developed an automation for a solar thermal power plant and have created many other industrial solutions.
I have experience in manufacturing 800 devices at a time used for solar tracking at a thermal power plant. Have made many battery operated low power devices, can design custom protocol not to lose any data. This is development cost and the hardware cost can be added actual. This will include design and development of transmitter and receiver, sending data to any cloud server as per your choice. The devices will also have battery charging option.
Thus, I can give you a one-stop solution for prototyping, PCB design, assembly, and manufacture. I would like to have the opportunity to work with you and would love to discuss your requirements in detail.
Please have a look at my portfolio for my detail work.
https://www.freelancer.com/u/krunalbhongade.html
Thanks and Regards,
Bk Krunal