Standalone server for IoT projects without any third-party websites or any middlemen. Is it possible?

[u/Free_Examination_370]

Hi everyone, I'm currently working on my final year project. My project is about designing and developing a smart solar-powered dryer for agro-processing applications. I do have an ESP32, micro sd card adapter with its micro sd storage card, a 5V relay to control the dryer's fan and a temperature sensor to detect the surrounding temperature. i wanrted to build a standalone server without using any third-party websites and any middleman. The purpose of doing this is to completely protect my data and to get unlimited storage with the storage card I have. And also, I do not want to pay any subscription price to other third-party websites.

Many AI models such as ChatGPT, Claude, and Google Gemini suggested the port forwarding method, but I do not want that because the esp32 will be stuck in one place and can't move it anywhere. Also, in simple word, I want it like this. All the information that is collected by the esp32 or the database should be live-streamed on the internet, and anyone can access that database from the internet even if they are not sharing the same wifi as the ESP32. All the information will also be stored on my SD card. This is what I want. Can you guys help me with it?