EZ430-Chronos accelerometer data

[sarmad....@gmail.com]

Hi


Can I use EZ430-Chronos to get accelerometer data from the wrist movement  ?  for how long can it record data ?


Thanks

[Fernando Ginez da Silva]

Hi Sarmad,

For sure! Take a look into my article (in english) and my master's dissertation (in portuguese only, sorry :[ ):

https://scholar.google.com.br/citations?user=dRJ8rRoAAAAJ&hl=pt-BR

But.. unfortunatelly, the watch doesn't have enough memory to store samples into its own memory, so you need to transfer all samples to some collector, which could be an IoT platform, or a more powerful platform such as a Raspberry Pi or BBB. You can see some discussion about this idea in my article.

Please feel free to ask me any questions you have.

Regards,

_____________________________________________

Fernando Ginez da Silva

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[sarmad....@gmail.com]

Thanks Fernando



 1. How can I transfer acceleration data from  EZ430 to Raspberry Pi fo example while it it worn on the wrist ?

2. can I use the generated accelerometer data to do sleep study ?

Thanks very much

[Fernando Ginez da Silva]

Hi,

If you choice is to use a Raspberry Pi as collector, or any other platform (with an USB host port), you have to connect the USB tranceiver (it comes with the watch), and write a simple software application which reads data from a USB-Serial port. Then you'll have the samples collected with the watch. I can share with you some information about the commands to control the watch and ask for acceleration samples.

My application was focused in identifying human movements and activities based in a single sensor attached to the wrist. Considering a single source of data, it has some limitations and positive/negative points.

I'm not a sleep pattern study specialist, but considering that my FitBit can extract very intersting information (being attached to my wrist), my answer is YES, it's possible. But have in mind that you must study all limitations involved with the use of a single sensor, such as: individual position while sleeping (Sleep belly down/up; sleep on the arm, blocking its movements, etc).

I hope this little contribution helps you. 

What's your application or study focus?

Best regards,

_____________________________________________
Fernando Ginez da Silva

[sarmad....@gmail.com]

how often this process of data collecting should be done ?

you mean the subject wears the watch and for exmple after certain time the watch is connected to rasbperry pi to get the data ?

I want to use accelerometer to study sleep features in Parkinson . is there are any other option ?

Regards

[Fernando Ginez da Silva]

Hi,

The USB Transceiver allows continuous communication with the ez430 watch. Have you tried the demo application "Ez430-Chronos Control Center" (http://processors.wiki.ti.com/index.php/EZ430-Chronos#Control_Center_for_Windows_.28Install_this_first.29)? 

The idea here is instead of using a PC to receive the samples (in realtime), our RaspberryPi will be doing this job. You just must to keep the raspberrypi and the usb tranceiver in the radio reception range, and you can receive the samples in realtime. You don't need to remove the watch, or directly connect it to raspberry pi to get the samples.

As long as I have no specialized knowledge about sleep study, I don't know other devices to recommend you. Chronos is in a "market product" state, you can, of course, look for other sensing IoT or wearable development platforms to achieve you requirements. I've made some very simple tests using a platform called "META R" (https://mbientlab.com/motion/) which can communicate with your application using Bluetooth technology.

Best regards

_____________________________________________
Fernando Ginez da Silva

--

[sarmad....@gmail.com]

I have found these : 


https://www.modmypi.com/arduino/tinyduino/inputs-and-sensors/tinyshield-accelerometer-board

https://www.modmypi.com/arduino/tinyduino/core-modules/tinyduino-processor-board-with-lithium-battery-support

may be they are good option