Internet of Things for solving my Fridge problem

Last year we got our kitchen remodeled which meant getting new kitchen cabinets and new appliances.  We had an old Kitchenaid fridge which did not fit into this new decor. We decided to get a new fridge and I started doing my market research. I did the usual stuff which included going to forums and consumer reports and eventually settled on Frigidaire.

photo 1(1)

Frigidaire – New Fridge

KitchenAid – Old Fridge

I wanted to get rid of our old Kitchenaid fridge but our usual temptation of holding on to all old things prevailed and I am glad we did that. Now that we had 2 fridges, we also means to compare one fridge over the other. We started doing that very soon as we noticed that our old fridge was retaining the freshness of fresh produce much longer. We attempted to resolve this issue by making the fridge colder but that resulted in ice forming on items placed inside the fridge and did not help in retaining the freshness of vegetables. We played with the temperature settings for a while. I called the company support and complained that fresh produce is spoiled faster. They essentially told me that nothing is wrong with my fridge.


So we kind of lived with this problem and tried to ignore the issue. No matter what we did, fresh vegetable would get spoiled faster in our shining new frididaire fridge.

Finally came Internet of Things at rescue. I reckoned that if I can place an IOT device in my fridge, I would get all the information needed and I can then chalk out a plan on how to go around this issue. And it also would help me in figuring out this whole IOT technology and at the same time, get something useful out of it.

So I got recommendation from my friends on what product to go for. Based on the feedback, I decided to get Raspberry Pi along with DHT 22 humidity and temperature sensor. This sensor turned out to be reliable. (

The picture shows my setup, It costed me around $100 along with a battery for power source.( Not shown in the picture). One does not need a battery and can use any USB based charger.  If I exclude the battery, the whole setup was around $50. As you can see, the sensor is attached to another board and that turned out to be a great help. I could keep the Raspberry Pi board outside the fridge. This was important as the board would not work properly once temperature went below 6 degree C.

Once I had it all wired up, I started getting the data. I connected the data feed to google spreadsheet so that I can do my analytics easily.





Screen Shot 2014-07-09 at 7.49.08 AMTo get the analytics, I placed DH22 sensor in my old fridge (Kitchenaid) and let the sensor do the magic of sending the data feed. I let the sensor stabilize and ignored the initial numbers given the residual effect as I was placing the IOT in my fridge. Once it stabilized, I started collecting data and I continued the collection process till I started seeing a pattern, As shown in the figure, it was clear that fridge operates in a cyclic manner, The thermostat has upper and lower limit and it kicks the refrigeration process once inside of the fridge reaches a upper threshold number and it keeps working on it till it reaches threshold min value. Once it gets to that, it stops till the max threshold is reached.

Based on the observation, we noticed

1. Average Duration of the cycle – 40 Minutes

2. Max Temperature – 5 degree C and Min Temperature – 4.5 degree C

3. Max Humidity -17.3 % and Min Humidity – 11.2 %

Temperature Variance – 0.5 degree C

Humidity Variance – 6.1 %

This was very nice as this essentially meant that all my food items were not facing too many fluctuations.


Screen Shot 2014-07-09 at 8.35.06 AM











3 thoughts on “Internet of Things for solving my Fridge problem

  1. Rama Pochinapeddi

    Amazing, your passion for Big data and Data Science is second to none. I have few use cases of my own, probably will try that. It is very interesting, and thanks for sharing

  2. SARAkah

    Your comment is awaiting moderation.

    how can i get my fico score online

    Lizard lounge dallas Membership Levels – Benefits, Dallas Zoo
    Membership Levels & Benefits From Safari Nights to Dallas Zoo Lights, enjoy a full year of adventures, value, and discovery! We may have your email on file. When you give the gift of Membership Levels & Benefits From Safari Nights to Dallas Zoo Lights, enjoy a full year of adventures, value, and discovery! We may have your email on file. When you give the gift of Dallas Zoo membership, you’re supporting our vision of Creating a Better World for Animals and the recipient of your gift will enjoy a full year of incredible experiences. When purchasing, please let us know …
    The post Lizard lounge dallas Membership Levels – Benefits, Dallas Zoo appeared first on Travel.

    Iowa Business
    metro pcs opening
    superferry online
    jobs rallyscareers com

    TOP 250 FREE DOFOLLOW SITE LINK LIST;type=webslice;board=2.0;board=4.0;www;board=113.0;board=136.0,255,255,1&opacity=true&head_bg=46729b&subscribe_bg=ad4141&border_color=c3c3c3&head_title=;board=12.0

  3. BURGERkah

    Your comment is awaiting moderation.

    statesville auto auction

    Houses houses for sale Video
    Houses houses for sale Houses houses for sale Welcome to Houses For Sale Lists – Free foreclosure listings – Bank foreclosures – REO properties – Government foreclosures. no credit card Full access to Free foreclosure listings in all states Live Updates – new Foreclosed Homes on HFSL FREE Foreclosures – new homes on HFSL 40 E 9th St Ofc 1002, Chicago, Illinois 60605 Friday 19 June 2015 Type: Other Status: Under Contract $179,000.00 10361 W Wadsworth Rd, Beach Park, Illinois 60099 Friday 19 June 2015 Type: Other Status: Under Contract $99,000.00 3238 N Kilbourn Ave 2, Chicago, Illinois 60641 …
    The post Houses houses for sale Video appeared first on Travels .

    New-hampshire Business


Leave a Reply

Your email address will not be published. Required fields are marked *