Tag Archives: iot

The best Raspberry Pi Case Ever! | single unit raspberry pi case includes power

I have looked at a number of Raspberry Pi cases, they all have one thing in common. They have a box (the raspberry pi itself), a USB cable, and an adapter at a minimum.

I wanted to create a unit which will improve these shortcomings for three main reasons.

  1. To look cleaner, neater,  and safety.
  2. Can be installed on sites where you are completing a security audit, the unit will not come under suspicion because of it looks.
  3. Cooling, performance and the ability to expand hardware inside the unit itself.

I used FreeCAD to design the 3D printable design and a Dremel 3D20 printer to print it.

I have made around three designs which I improved on each time, landing on the one published here.

The print contains a space for a Samsung USB power plug and a section for the USB connector, it contains a grove to allow it to sit firmly in place.

The Raspberry Pi sits on four poles which hold it firmly in place, and also allows you to connect the cat5 connected and four USB ports at the bottom.

I have build three slits on the bottom of the cover and three at the top, this is a clever wait to passively cool the Raspberry Pi. The air inside will heat up and rise, then exit from this top slits. This will then create a suction from the bottom, taking in the cool air. No need for a fan! Test proved to be promising.

I am really pleased with the design and use it at home.

I have plans to make it alot smaller, as you can see from the photos the biggest problems are the size of the adapter and the plug into the Pi itself. I have ordered smaller and cheaper power plugs and some L shaped USB connectors. This will allow me to design the casing to be alot smaller, ill keep you posted.

To make this project happen you need the following

Enjoy!

Building a WiFi enabled IOTs refrigerator temperature monitor with a Raspberry Pi | raspberry pi refrigerator temperature monitor via wifi internet of things

Refrigerator monitoring is a big thing, especially for commercial reasons. So i thought this is perfect raspberry pi territory.

A $50 raspberry pi, a $3 USB extension cable and a $10 USB temp monitor is all it takes. Commercial products that perform the same task cost $500+

So lets start off by updating the OS and installing all the applications we’ll need.

Lets check that the USB temp sensor is connected and online.

Lets download the source for the temp sensor.

The is how you get a reading.

I wrote a script which just grabs the Celsius reading and logs it in a log file, I have this running every minute. This is just for testing purposes, ultimately we’ll get Nagios to monitor the reading and alert based on their outcome.

 

 

Building a 24/7 Raspberry Pi using offgrid power. Solar and battery operated outdoors. | raspberry pi 3 iot 24/7 solar panel battery charge cmtp02 wifi mesh node weather station

After doing months of research and experimentation I have finally completed my task. Building a raspberry pi with the ability to running 24/7 outdoors off grid using batteries and solar power.

Why? There are thousands of applications for this kind of setup, here are some I would like to experiment with in the future:

  • Mesh network node, over a wide area
  • Weather station
  • Outdoor wifi hotspot
  • Outdoor wireless camera node
  • Wifi bridge

Priorities. Project objectives were,

  • Cheap
  • Waterproof
  • Heatproof
  • Robust
  • Simple

Considering this was a experiment / proof of concept this was put together using things I found around the house, obviously if this was built for commercial applications the housing would need to be built using steel and this would make the costs go up. This was built using the following components and costs:

  • Raspberry Pi $49.50
  • Raspberry Pi Case $10.85
  • Micro USB Cable $1.00
  • 12v to USB Converter $5.11
  • Solar Charge Controller CMTP02 $12.00
  • Solar Panel 60Watt $59.98
  • Bucket
  • Battery AGM12-20 $65.00
  • Total: $203.44

Once I had all to components I used Styrofoam which I found in my garage to build a base which will be located at the bottom of the bucket, the objective will be to hold the battery in place and also insulate it form the suns heat. see below.

 

 

 

 

Once we have a nice tight fit, we’ll install it in the bucket. I will also use the leftover Styrofoam which I have crusted into small pieces to fill the gap between the battery and the wall of the bucket. This will stop any movement and will also provide insulation to the battery itself.

 

 

Now we need to take note, I have completed a similar experiment here where I tested the battery and Raspberry Pi alone without solar or controller. I managed to get 4 days uptime.

Next we will need to run the wires required for the solar panel, I drilled a hole at the bottom of the bucket and brought the wires up to the top. I did this because if water comes through the hole it will stay at the bottom and not harm the electronics.

 

Next we make another circle with the Styrofoam and fit it on top of the battery, this is where we will house the electronics. Its the safest place as the lid will be water and air tight.

 

Now we can connect the Solar controller CMTP02 to the battery and to the Solar panel, finally onto the 12v to USB controller.

 

Bringing it to life! Install the raspberry and have it connect to my home wifi network. Then seal the bucket and setup somewhere in the backyard where it will get the most sun,facing North (In Melbourne).

Now Im will testing this setup, it should run forever like this. During my first setup run, I had connected the solar panel the wrong way due to bad color coding on the cables. Now that its fixed its been running for three days and the battery is currently on fill charge.

Building a weather station Raspberry Pi 3 IOT | Raspberry Pi 3 weather station weewx IOT

I wanted to build a weather station located at my holiday house, functional reasons were to know when it hasn’t rained in a while so I knew if the garden needs watering.

The nerd in me just wants everything to be network enabled.

The components I used,

  1.  Acurite Pro 5-in-1 Color Weather Station with Wind and Rain
  2. Raspberry Pi 3

The setup was very simple and quick to set up!

Lets get started!

After installing the weather station somewhere around your house and switching on the base station. You should now be able to see the weather at the base station, information such as rain, temp, humidity etc should be flowing.

Now connect the base station to the raspberry pi via the USB cable.

SSH onto the raspberry pi, to check if we have connectivity do the following.

When you see the device we have connectivity.

Bus 001 Device 005: ID 24c0:0003

How to configure the server and install the software, in this setup we’ll be using weewx for our communication with the weather station and data gathering.

Then navigate to the raspberry pi IP address through your web browser.

http://192.168.1.1/weewx