Part 1- Model house and project

Posted Sunday, October 23 2022 - 23:01pm by

Michal Novotný

Pi-Home - Modelový inteligentní dům

We have chosen the step by step tutorial of setting up a smart home as the best learning option. In this guide you will find how our model house looks like, how rooms are labeled and what we will control in our model house. If you learn to set up a model house, it will be easy for you to adjust the number of lights and their labels so that the setting fits your real project. Let's go!

Pi-Home model house

Our model house has a floor plan ~ 10 x 10 m . To avoid having to reinvent the wheel we used the finished floor plan of the real house Terra 173 by Atrium company with their permission. The ground floor rooms are coded as 1xx and the first floor as 2xx. Everything is for the purpose of the tutorial labelled in English.

The house contains the following types of controlled circuits and their coding:

Lights Lxxx	Sockets Sxxx	Shutters/Blinds Rxxx
Heatings Hxxx	Butons Bxxx	PIR sensors SPxxx
Temperature senors STxxx	Humidity sensors SHxxx	Temperature floor sensors SFxxx

The coding you have chosen will be with you almost forever, so think about making it as versatile as possible. A well-chosen coding will give you easy orientation in modules, cables and code. It should be as short as possible, without accents or special characters.

The following table shows the codes and numbers of each type of controlled circuit/sensor:

	Lights	Sockets	Heatings	Shutters	Buttons	Sensors
						*Temp*	*Floor Temp*	*Humidity*	*PIR*
1	L011	S011	H111	R111	B111	ST111	SF111	SH111	SP111
2	L012	S012	H121	R131	B112	ST121	SF121	SH121	SP121
3	L013	S013	H131	R132	B121	ST131	SF131	SH131	SP131
4	L014	S014	H151	R141	B122	ST141	SF151	SH141	SP141
5	L021	S015	H152	R151	B131	ST151	SF152	SH151	SP151
6	L022	S016	H201	R152	B132	ST152	SF201	SH152	SP152
7	L031	S111	H211	R153	B133	ST161	SF211	SH161	SP161
8	L041	S121	H221	R154	B134	ST201	SF221	SH201	SP201
9	L042	S131	H231	R155	B141	ST211	SF231	SH211	SP211
10	L043	S141	H241	R211	B142	ST221	SF241	SH221	SP221
11	L111	S142		R221	B151	ST231		SH231	SP231
12	L112	S151		R231	B152	ST241		SH241	SP241
13	L121	S152		R241	B153
14	L122	S153			B154
15	L131	S154			B155
16	L141	S155			B156
17	L151	S161			B157
18	L152	S201			B158
19	L153	S211			B159
20	L154	S221			B160
21	L155	S231			B161
22	L156	S241			B162
23	L161				B201
24	L201				B202
25	L211				B211
26	L212				B212
27	L221				B213
28	L231				B214
29	L241				B221
30					B222
31					B223
32					B224
33					B231
34					B232
35					B233
36					B234
37					B241
38					B242
39					B243
40					B244
Sum	29	22	10	13	40	12	10	12	12	Total	160
	Arduino1 (PA1)	Arduino2 (PA2)	Arduino3 (PA3)	Arduino4 (PA4)

Wiring scheme

The diagram of the low-current switchboard for this model house is as follows. In this case, a separate switchboard with a size (in x w x h) of 1200x800x300 mm and 6 to 7 DIN levels with a spacing of 150mm is recommended. Cable perforated plastic U are suitable to be installed between DIN strips.

Note: The low-current part in this case does not contain an installation relay. These are located in the high-current installation and only the control cables of switching coils are pulled into the low-current switchboard.

Features

Well, what will our model house be able to do after this tutorial?

Feature	Note
Control 29 lights circuits	Switch on/off of 230V circuit without dimmer, we recommend wireless devices for dimming if neccessary - Zigbee, Zwave, Shelly, etc.
Control 22 socket circuits	Why? We can turn off power in all circuits after we leave the house -> children's room, washing machine, iron, oven, etc..Advantage of maximum consumption logic in connection with PV panels.
Control 10 heating zones	Direct switching of electric heating (heating cables, electric radiators) or opening/closing of heating valves for the given zone. Logic of temperature control based on values from the room temperature sensor + possibly in combination with floor temp sensor.
Control 13 blinds/shutters	Direct motor control with up/down/stop through multi phase cable. Rotation function of blades (open, close). Group control. Connection to weather station. Can be extended with various rules according to time of the year, forecast, etc.
Control 40 buttons	Classic 230V buttons (not switches). Tested for Hager/Berker (2 and 4 buttons). Connection via UTP cable. Safe voltage 5V to ground (GND).
Monitor room temperature 12 x	We are using combined sensor DHT22 + PIR HC-SR501. Any Arduino compatible solution or MQTT sensors can be used as well as Z-Wave, Zigbee.
Monitor room humidity 12 x	We are using combined sensor DHT22 + PIR HC-SR501. Any Arduino compatible solution or MQTT sensors can be used as well as Z-Wave, Zigbee.
Monitor motion in room 12x	We are using combined sensor DHT22 + PIR HC-SR501. Any Arduino compatible solution or MQTT sensors can be used as well as Z-Wave, Zigbee.
Monitor floor temperature 10x	Solution with water-resistant sensor DS18B20 directly connected to UTP and the to Arduino pins.
Alarm	12 motion sensors primarily used to control the lights (hallways, bathroom, pantry, etc.) are switched to security mode at the time of leaving the house with immediate notification (email, telegram)
Optional extensions:	energy meter smart home water level measurement connecting with Jablotron alarm connecting with Doorbird v intercom control Nilan using Modbus

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