Home thermostat NEST like

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underscore4
Posts: 12
Joined: Sunday 19 March 2017 23:06
Target OS: Raspberry Pi
Domoticz version:
Contact:

Home thermostat NEST like

Post by underscore4 » Sunday 23 July 2017 11:34

Hi,
starting from Google Nest concept i decide to develop a small project with an Open Thermostat using Node MCU solution.
Here spare parts need and code to use:

Hardware
Node MCU for temperature sensor of room
Node MCU for main heater control
DTH 11 for room temperature reading
DS18B20 for water temperature of heater
Relay based board for control of heater

Software
Domoticz
Tasmota firmare version 5.1.3 (https://github.com/arendst/Sonoff-Tasmota)
Blocky script (if need)

Step 1
I have assembled and mounted Node MCU with DTH11 using unused TV wall socket and programmed like below:

Image Image Image

Step 2
Domoticz activation and config using MQTT (i have used 2 zone for temperature check) like below:

Image Image

Step 3
I nave assembled the thermostat control to have wifi activation of heater when need using Tasmota firmware like below:

Image Image Image

Step 4
I have used a simple blocky script like below:

if “request heat” is TRUE (that could be the constant switch, or the thermostat temp being below measured temp),
turn on the pump
else
if temp < 20
turn on the pump
if temp > 22
turn off the pump

You could use also a manual switch to activate the thermostat and then heater on (much simple for someone).

******Version 1.1******
Release note
Using virtual thermostat to adjust temperature using dummy sensors and heater switch idx of domoticz.

Software
Domoticz Smart Virtual Thermostat
**Thanks the Author: Logread (aka 999LV on Github)**

https://www.domoticz.com/wiki/Plugins/S ... ostat.html

Panel

Image

Setup of temperature

Image


Not working yet
Heater not start if open windows or door open detect
Telegram message


Enjoy my project and if you like it, please help me to let him better!

underscore4
Posts: 12
Joined: Sunday 19 March 2017 23:06
Target OS: Raspberry Pi
Domoticz version:
Contact:

Re: Home thermostat NEST like

Post by underscore4 » Saturday 23 September 2017 16:23

Version 1.1 at first post

IceStuff
Posts: 1
Joined: Sunday 08 April 2018 19:22
Target OS: Linux
Domoticz version:
Contact:

Re: Home thermostat NEST like

Post by IceStuff » Sunday 08 April 2018 19:25

Hello All,


Nice job on your original work.

I have extended an existing project called Hard Thermostat with webpage controls, heating and cooling modes and supports all temperature sensors.

Check it out and provide feedback would be great. Humidity control is coming.

https://github.com/IceStuff/Sonoff-Tasm ... ag/v5.12.1

Thanks,
IceStuff

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