Development and implementation of a system for acquisition and processing of sensor data.
As project work, during my further education as technician in mechatronics, I decided to do the following IoT-Project:

Project

Project description

Goals

Get an overview of a complex central heating system
Control processes
Optimize the existing control

System diagram of the present heating system with planned measuring points

Requirements

Equip the heating system with sensors
Collect sensor data
Present sensor data on a website
Run data-based actions

One section of the resulted website displaying collected sensor data

Course of action

Concept

The idea was to develop an own system, instead of using proprietary components like a PLC or industrial sensors.
This would result in a scalable and cost efficient solution using common consumer electronics. concept of the planned system
Concept schema of the developed system

Tasks

Developing a custom pcb
Choosing components
Designing parts
Manufacturing assemblies
Developing software
Testing and evaluating
Documenting the project in a scientific paper

Layout of the designed pcb in kicad

Conclusion

Implemented Features

Multi purpose pcb:
- Read various sensors
- Control things with relay and mosfet outputs
- WiFi Capability
Send sensor data to central server
Store data in a database
Access data via a web interface
Analyze data, send notifications
Send commands from server to pcb

One of the pcbs wired and mounted on a wall next to the heating system

Projects based on this one

In this particular project a central heating system is monitored and controlled using the developed pcb.
However, the multi purpose pcb was planned to be used in various other, future projects.

Developed pcb used for controlling the electric armchair