We have a cargo shipping container with a built-in refrigeration system. Give freezer unit keeps the temperature of the container at a stable value of -9 Degree Celcius. If that temperature is reached is shuts down until the temperature rises again. We need an IoT device designed to monitor the on-off timings of the freezer system. The device will be manufactured for lakhs of containers. We'll prefer if the device contains a simple readymade board like Arduino or Raspberry Pi along with the GSM and the SD Card attachments added as shields. We want people for both the hardware and the software. We'll prefer if multiple freelancers and can team up and tackle this project.
Hardware design to fulfill the above-mentioned requirements
Firmware to sync the data to the server and save it to the sd card if the server is not reachable
Server Setup to store such data from thousands of devices
Simple Dashboard to see this data