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A summary for Internet of Things roadtest

Thanks to Texas Instruments Element 14 for possibility to be a roadtester for Simplelink Wi-Fi CC3200 launchpad.

It is a single chip containing  both Wi-Fi connectivity processor and Cortex M4 core ARM processor communicating over internal SPI connection.

I have tried to learn programming CC3200 in CCstudio and bloged about every step: Internet connectivity,  analog inputs, I2C, hibernation, power consumption, motor driving.


Data were stored and visualized by Plotly and Xively, and on a Linux webserver.


One of CC3200 boards worked autonomously for a month in a tomato greenhouse powered from solar panel and AA cells. Greenhouse was filmed by Android phone providing internet hotspot and later a time lapse was made: IoT in tomato greenhouse on Vimeo

From Sept 24 in video one can see a box containg CC3200.


The autumn came and was not enough time to implement automatic watering system in the greenhouse. I have set up automatic watering system using CC3200 on a flower pot indoors and it is continuously uploading data to IoT. From photodiode sensor one can see that days are getting shorter now in autumn:


Another successful application of CC320 is wireless measuring of hot water pipe temperature at home for over 1 month:


I was first to write a blog on Element 14 website (1800 views) about CC3200 programming using Texas Instruments Energia when it was released in September 2014 and at (1500 views).  I was very happy that this blog was highligted by reviewing coolest things done within hobby electronics.

Thanks to Element 14 for generously donating 7 launchpads and I could share boards with my colleagues and students. One of applications they are making is e-paper display for doors telling when will be back from lunch or meeting. Another will be about air quality monitoring in classrooms: CO2, dust, etc...

More ideas:

  • wireless bathroom scale that will allow me to follow my weight dynamics online.
  • mailbox notifying about post arrival
  • bicycle alarm employing onboard accelerometer
  • camera application for photos and household water/electricity meter readout.


Solar IoT garden lamp - weather station - intrusion detector


In my first blog entry I envisioned solar powered garden lamp with IoT connectivity and have recently started building it.

Solar driven garden lamps often can not supply light through all the night. PIR motion detector allows to switch on LEDs only when someone is nearby. Such lights are very practical at the house entrance door when trying to find keys.


12 superbright white LEDs are drawing 400 mA from 2xAA 2500 mAh rechargeable batteries. Actually, 2.4V is not enough to drive a white LED. I used step-up board from Wurth Electronics that was supplied in another roadtest (wireless challenge). Each 3 LEDs are connected in series and there are four such series. If necessary, it might be possible to program PIR alarm mode going to a mobile phone. Everything including the solar panel is hidden inside the white glass ball. Solar cell is placed on the upper part inside the ball.