Lets Build

How to Build Smart Heating with Raspberry Pi


Raspberry Pi

IOT (Internet of things) is common notion these days but what really you can do with it? what first thing you want to connect? how you can make something smart if it isn’t smart?  i.e Smart Heating, what are the pros and cons?

You only have two options, one buy off-the-shelf commercially available product (there are tons and tons of comparison between all commercially available solution so i m not going to go through any of that), second you could spend less and have fun building things yourself.

Fancy second option? then Let Get Started!!!

This Project is based on credit card size single board computer called Raspberry Pi, whole systems is presented using Apache web server, all information is stored in MySQL database. Python script is used to log temperature sensor data using One wire DS1820 temperature sensor, most of the code is written in PHP.

Before we deep dive into this project something very important: PiHome comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. DO NOT MAKE ANY CHANGES TO YOUR HEATING SYSTEM UNTIL UNLESS YOU KNOW WHAT YOU ARE DOING, contents provided here are for information and education purpose only, I take no responsibility for any loss or damage to you or your property.”

Following posts aren’t in sequence, if you want to follow all step by step please check this link.

DS18B20 Temperature Sensor with Raspberry Pi

One Wire temperature sensor DS18B20 is very popular and easily available because they are quite cheap and provide satisfactory precision of temperature readings. One wire DS18b20 has operating temperature range from -55°C to +125°C with accurate to ±0.5°C. DS18B20  can easily interface with Raspberry Pi. This sensor has three pins: VCC, GND and DATA. The voltage range is between 3.0 to 5.5 so this can be easily interfaced with raspberry pi. To communicate with the sensor 1-wire protocol is used.…

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Battery Powered Arduino DS18B20 Temperature Sensor

18650 battery powered Arduino DS18B20 temperature sensor would lost on average 2 years without to re-charge or replace the battery. It is best to use 3.3v Arduino Pro Mini with lower clock speed to conserve battery. To optimize battery life further you can remove power LED and status led connected to Arduino pin 13. Check out PiHome Shop for all you need for your Smart Heating 18650 battery powered temperature sensors are feed power to Arduino mini through raw pin…

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Wireless Arduino Multi Zone Controller Relay with nRF24L01

Wireless Arduino Multi Zone Controller Relay with nRF24L01: If your house have Multi Zone Heating then you can control each zone heating independently with raspberry pi and this will save you lot on your heating cost considering that you don’t have to heat all the house all the time. For this purpose you need to build wireless relay switch as Multi Zone Controller so we can open and close zone valve to circulate water in each zone as needed. Check…

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Wireless Arduino Boiler Controller Relay with nRF24L01

Wireless Arduino Boiler Controller Relay with nRF24L01: Control gas boiler with relay by connecting it to room thermostat connection on gas boiler without passing any current to gas boiler or at least this is how i did it and not to worry about buildup pressure inside heating pipes as gas boiler controller takes care of that itself. You can control High Voltage electronic devices using relays modules that are readily available in the market. I am using the HL-52S 2…

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Connect Arduino with nRF24L01 Radio

The nRF24L01+ transceiver module uses the 2.4GHz band and it can operate with baud rates from 250kbps up-to 2Mbps true ultra low power and low cost transceiver. nRF24L01+ communicate with Arduino via SPI interface and it consumes around 12mA with operating voltage from 1.9v to 3.3v. nRF24L01+ can communicate with other nRF transceiver modules and it can reach 100m in clear line of sight with lower baud rate. In this article I will explain you how to connect nRF24L01 with…

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Python Script for MySensors WiFi/Ethernet Gateway

Python Script for MySensors WiFi/Ethernet Gateway: To communicate with MySensors WiFi/Ethernet gateway I’m using Python script which run as cron job on my controller (Raspberry pi). Python script is used to receive all incoming and sending all out going commands through serial gateway to all MySensors nodes. You can start python script to check all communication is working fine and script can communicate with MySensors WiFi/Ethernet Gateway. Installing Dependencies Login to your raspberry pi via ssh and issue following commands…

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Python Script to Communicate with Serial Gateway

To communicate with mysensors serial gateway I’m using Python script which run as cron job on my controller (Raspberry pi). Python script is used to receive all incoming and sending all out going commands through serial gateway to all mysensors nodes. MySQL Table to For  Incoming Messages First you need to create table in MySQL database so we can save all incoming messages from wireless sensors to MySQL database. Simply create table or copy and past this script to create…

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One Wire Temperature Sensor – DS18B20 to MySQL/MariaDB Database

If you followed instructions on how to connect One Wire DS18B20 to Raspberry pi gpio then next step would be how to take temperature readings from DS18B20 One Wire digital temperature sensor and store these readings to MySQL/MariaDB database. As you may know that each DS18B20  One Wire digital temperature sensor has a unique 64-bit serial number wonderful part that we can have more then one DS18B20 One Wire digital temperature sensor connected to same 1-Wire bus. Check out PiHome…

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Install Apache, PHP 7.0 and MySQL/MariaDB on a Raspberry Pi (LAMP) with phpMyAdmin

LAMP is an acronym that stands for Linux Apache, MySQL/MariaDB and PHP. i have LAMP installation post for PiHome but i see lots and lots of people are looking for setting up php 7 with phpMyAdmin and MariaDB on raspberry pi and there isn’t any comprehensive set of instruction that covers this all for PHP 7, MariaDB on raspberry pi. If you are looking for Raspberry pi SD card image for LAMP (Apache, PHP 7.0 and MySQL/MariaDB on a Raspberry…

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Auto Reconnect WiFi on Raspberry Pi

My Raspberry Pi 3 Wi-Fi isn’t very reliable even after disabling power management my RPI still manages to lose connection to  my Wi-Fi router and i don’t have any keyboard or screen connected to it and its not advisable to do hard reset i.e unplug the power as it may corrupt your SD card. I’m going to cover writing a short script that Auto Reconnect WiFi on Raspberry Pi to a Wi-Fi network. The script will run as cron job…

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