On the Raspberry developers forum, Liz Upton recently noted one of the DIY projects posted by one of its members. She describes the project in her official blog where she applauds the effort made using Raspberry Pi. The project talks about maintaining humidity level in a cellar. The project was primarily initiated to measure relative humidity and temperature on the inner and outer end of the cellar,further these values were used in calculation of absolute humidity of this small place. The setup then sets the ventilation in case the inner end humidity is higher than outer one.
The maker of the project was actually trying to convert the cellar into a wine keeping store and as you can make out from the pictures he kept the fabric softener bottle next to the yoghurt. A touchscreen controller has been kept right next to the non-alcoholic liquid bottle with a USB receiver. The system yields the output in a graphical manner on a website called ngnix which gives the owner facility to control this system from a distance.
The project doesn’t need much of hardware tinkering as per its maker. You can always use off-the-shelf parts to control and sense things. Apart from this, you will need two wireless sensors one for outdoor and another for indoor segment. You can always get these fromelv.de and check humidity on all levels. These sensors will transmit the information to its USB receiver while the exhaust and intake fans will be controlled by Energenie plug strip. For other details, you can check out the Raspberry Pi forum.
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