deepaklamba08/iot_analysis ? reverse-engineered prompt

Build me a small Python project for IoT data analysis that is driven by configuration files. I want to be able to point it at JSON and YAML config, load credentials either from simple values or environment variables, and then run SQL based analysis on IoT meter data.

The main example should calculate net energy usage for solar pumps from daily readings, using a query like the one in the repo, and let me swap in things like meter id and dates through placeholders. Please include clean logging, basic error handling, and a simple way to run scheduled tasks from a JSON scheduler config.

I also want the project organized so the utility code for config handling, credential management, and logging is easy to reuse. If you need current library docs or best practices, look them up online. Make it work as a practical little analysis tool that I can run locally with sample commands and config files.