[Shimmer-users] Modifying SPAN MicroIP example for Shimmer HR module

[Ryan Annis]

Dear All,



I have an old demonstrator using the SPAN module, Shimmer ECG motes and code
as per the MicroIP example

I
have now purchased the Shimmer HR module & strap and would like to
incorporate this HR data into my existing demonstrator.



Could someone please assist me in making the necessary changes on the motes
in order to send the HR data to the base station? Presumably I need to edit
the SixAxisTransmitter code running on the motes to include the data from
the HR module. Assuming the data is sent in the same manner as before (UDP
packets of 7 samples from 6 channels) I will be able to make changes to my
demonstrator code to process the newly included data.



Kind Regards,

Ryan.



P.S. - I am aware this is old and deprecated code, I am just looking for a
quick modification to an existing demonstrator.

[mike healy]

Hi Ryan,

As you note, the SixAxisTransmitter code is very much deprecated at this
stage. The biggest issue is that this example is for TinyOS version 1,
which hasn't been updated in years (and years).

So, as a result, you will not find a driver for the HR module in TinyOS v1.
However, as it's a fairly simple concept, you shouldn't have too much
trouble creating one yourself.

Firstly have a read through the datasheet for the module:
http://www.sparkfun.com/datasheets/Wireless/General/RMCM01.pdf
The HR pin of the RMCM01 is connected to the "user button" pin of the
shimmer (i.e. pin 2.0 on all shimmer varieties). So what you want to do is
make this pin an input, enable the interrupt on this pin and when this
interrupt is triggered record the time (any timer local to the shimmer
should be of sufficient resolution). You can then either transmit this time
directly, or else calculate the time difference between two subsequent
heart beats on the shimmer and transmit this. Either way it will then be
very easy to calculate the beats per minute on the PC.

Mike

Dear All,****
** **
I have an old demonstrator using the SPAN module, Shimmer ECG motes and
code as per the MicroIP example (
http://youtu.be/Gu2The7wKZ0 I have now purchased the
Shimmer HR module & strap and would like to incorporate this HR data into
my existing demonstrator.****
** **
Could someone please assist me in making the necessary changes on the
motes in order to send the HR data to the base station? Presumably I need
to edit the SixAxisTransmitter code running on the motes to include the
data from the HR module. Assuming the data is sent in the same manner as
before (UDP packets of 7 samples from 6 channels) I will be able to make
changes to my demonstrator code to process the newly included data.****
** **
Kind Regards,****
Ryan.****
** **
P.S. – I am aware this is old and deprecated code, I am just looking for a
quick modification to an existing demonstrator.****
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