Under 150€ DIY open home automation system

Since several months I worked on setting up an home automation system for my house. The goal was to have an open system, with an important part of DIY work and second hand components so as to satisfy my curiosity about these new technologies.

In this first article I will expose the architecture of the system , the bill of material and the software involved. These devices are maybe not compliant with your country regulations and norms, it is your responsability to verify this compliance.

Bill of material:

3 * 433Mhz presence sensor 5€ = 15€
3 * 433Mhz door sensor 4€ = 12€
1 * 433Mhz smoke detector 8€ = 8€
1 * arduino UNO clone = 5€
1 * arduino ethernet shield W5100 = 6€
1 * raspberry pi 2 or 3 = 40€
1 * sdcard 8gb = 5€
1 * 433Mhz receiver and 1 * 433Mhz transmitter = 1.50€
1 * siren 3€
1 * 9V wall transformer (second hand) 1€
1 * kit of 3 switch plug = 20€
1 * DHT11 temperature sensor = 1.50€
1 * old computer speakers = 5€
Leds and resistors <3€

Architecture:

Software:

Raspberry Pi

Raspbian
OpenHAB
Mosquitto
SqueezeLite and SqueezeboxServer
Fail2ban

Arduino

RCSwitch library
DHT Library
Ethernet Library
PubSubClient Library (MQTT)
433toMQTTto433 program

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