Ensuring comfort climate with smart humidifier

The big part of your comfort feeling is related to room temperature and humidity level. And not even comfort, but also a risk of getting sick of viruses, bacteria and fungi. Martin took a little research and found out that too dry or too wet environment is risky. Too dry air can cause allergies, tracheal infections while to wet air is great environment for fungi, mites, bacteria and so on. When summing all factors the golden interval lies between 40% to 60% of humidity. Well temperature in this also plays a significant role because comfort level is directly related to both parameters. If there is higher surrounding temperature we fell better in less humid environment while in cooler area more humidity doesn’t hurt. Having those factors in mind, Martin have built smart humidifier which also connect to internet. His setup is based on his earlier built three channel WiFi relay board based on ESP8266. The control unit is connected to ultrasonic humidifier which doesn’t have much automatics just on/off and intensity settings. Controller takes readings of temperature and humidity from… Continue reading

Arduino based thermostat with ESP8266 WiFi interface

Simple home automation solutions can make life easier, but with proper control interface it may make it even harder. If you are thinking about building or purchasing home automation unit for instance a thermostat, make sure that it has convenient control and remote access. EasyIoT has shared his thermostat project where he builds an Arduino based module with multiple features and control options. Thermostat consists of Arduino Mega 2560 that comes along with 3.2” touch screen LCD. Thermostat is capable of controlling single channel load with isolated relay. Since there is plenty of room and processing power, it also can do more. It takes pressure measurements with barometric BMP180 module, also temperature and humidity with well known DHT22 sensor. Ti also tracks time with DS1302 RTC module. Thermostat has 6 modes of operation depending on temperature level including Auto and Off. Thermostat is also connected to internet via ESP8266 module where all data and basic control is available via EasyIoT web interface. Continue reading

CO2, temperature and humidity logger on Atmega328

There are many indoor temperature and humidity meters and loggers already built. But there is always a space to do something new and useful in this area. Davide decided that measuring temperature and humidity isn’t enough for complete climate meter, so he added CO2 meter. His project consist of NDIR infrared MZ-Z14 CO2 meter, DHT22 temperature and humidity sensor. Atmega328 reads sensor data, displays it on LCD screen and also logs to xively.com feed. Connection to internet is established with network board based on EC28J60. Where most of project code he brought from his previous projects. Continue reading

Arduino driven humidor with web logging

Humidor is a device that tries to keep humidity and temperature at desired level. Normally they are stand alone devices that can be refilled with water to keep humidity at level. Dzzie decided to add DHT22 humidity and temperature sensor to it and along with Arduino log this data to webserver. He wrote a PHP script that records humidity and temperature data to database every 20 minutes. There is also a trigger mechanism which sends an email alert once one of parameters gets out of safe range. Humidor sensor is run with Arduino with LCD shield. It has a feature to record time when water is refilled. If you use humidor in sensitive area – then accessing data online might help a lot. Continue reading

Monitoring temperature and humidity using Plotly and Arduin

Temperature and humidity sensor DHT22 is popular and dead simple. You just attach it to Arduino with three wires, load library and you can get data immediately. Another part would be how to display data. For fast start you can use serial output or even LCD. But if you have Ethernet shield laying around you can do much more fun with it. Plotlygraphs from instructable have put a nice set up which reads data from sensor and plots it on web page. To do so, he used Plotly web service which allows plotting and visualizing data from various sources. There is a ready made Plotly Arduino api library, so things are even easier. Once graphs are populated, they can be inserted in to website where you can access from anywhere. Author didn’t limit himself with just bunch of board – he made a simple housing of couple wood pieces that fits nicely on his desk. Continue reading

Sense The Surroundings

Build your own stand-alone temperature and humidity display with this guide on Instructables. The temperature at any one office varies quite a bit depending on the time of day, season. Although you can get custom made thermometers in less than 5$, however the user decide to build his own even if it cost a way too much then normal sensors. The placement of device was layout on the Prema-Proto Board. The author used a completely open-source electronics design application named Fritzing. It’s compatible with Windows, OSx as well as Linux. Its libraries can easily be found on the internet The microcontroller used in this project is typically sold as a blank chip, but some vendors sell Atmel ATMega328P AVRs pre-programmed with the bootloader necessary to interface with the Arduino IDE. If you’re using a blank microcontroller, you’ll need to burn a bootloader to it with some kind of programmer. For the project you require a basic, DHT22 temperature-humidity sensor, a Prema-proto board , some caps, resistors, as well as multiplexed seven segment display along with an Arduino Continue reading