kjfs/dieffen-sensoren

Dieffen Sensoren

Data generated by following IoT sensors running on ESP32 microcontroller.

• DHT-22 is a digital sensor for measuring humidity and temperature.
• GDK101 is a semiconductor gamma radiation sensor module optimized for low-level gamma detection up to 200 µSv/h.

The data pipeline consists of following components:

• InfluxDB is used as a time series database for real-time data produced by our IoT sensors and other backend applications
• Multiple Telegraf instances on every host in our network for collecting and sending metrics and events to InfluxDB.
• Eclipse Mosquitto is a MQTT broker using the publish-subscribe mode for messaging IoT data between devices, sensors and servers.

Frontend, Backlend, sensors and relational data:

• The front-end was programmed in GoLang, Javascript and CSS.
• The back-end services were programmed in GoLang.
• The IoT sensors were programmed in C++.
• PostGres is used as a relational database to store usernames, password and other webapp specific data.

For our WebApp (written in Go 1.17) we used the standard library as well as following external packages:

• Soda CLI for CRUD operations with database functionality to deal with databases in Go (e.g. to tun migrations and build/execute queries)
• SCS implements a session management pattern following the OWASP security guidelines.
• Nosurf is an HTTP package for Go that helps you prevent Cross-Site Request Forgery attacks.
• Chi is a lightweight, idiomatic and composable router for building Go HTTP services.
• Go Simple Mail is a simple and efficient package to send emails.
• Package pgconn is a low-level PostgreSQL database driver.
• Govalidator is a package of validators and sanitizers for strings, structs and collections.
• Bcrypt package implements Provos and Mazièress bcrypt adaptive hashing algorithm.

This project is hosted on a bare metal server, for which we use:

• Proxmox Virtual Environmentas our main virtualization management solution.
• pfSense firewall (a FreeBSD distribution) for unified threat management, load balancing, multi WAN, TLS encryption and more.
• Grafana is our analytics & monitoring solution for our InfluxDB data.