ANT Forum

Hello:

I am doing a project for connect a heart rate monitor (GARMIN Premium heart rate monitor) with a PC using C#

I have managed connect the HRM to the PC and receive information

My problem is that the HRM randomly changes the format of data page. Is there any way to control the format of the data page where the HRM sends information ?

According to the document"ANT+ Device Profile - Heart Rate" avaliable in http://www.thisisant.com/developer/resources/downloads/#documents_tab the H,RM can send data in 5 different formats.
I want to set the HRM send only format 4

¿Is this possible?

I wait for responses

Thanks!!      

I'm not aware that you can tell a heart rate monitor which data pages to send and which not.
At least the Device Profile doesn't specify any control messages for that.

But why would you want to focus on data page 4 only?

Cheers,
OMB      

Hello old_man_biking

I want to recieve data in format 4 because, we are interested in calculate RR time. In format 4, using bytes 2 , 3, 4, and 5 we can calculate RR time.

Another question: I have found in ths forum the sequence of a transmission in HRM profile (http://www.thisisant.com/forum/viewthread/2664/) Is it true?

Thanks!!      

You don't need page 4 to calculate R-R time.
All HRM messages contain both event count and last event time (event = heart beat).
So it's easy to get R-R time from all HRM data pages.

Cheers,
OMB      

Hello old_man_biking

My last question: Could you tell me what is the sequence of data pages in a transmission for the HRM profile?

I have managed to connect the sensor to the computer and store the reply. I have obtained the following sequence:

83-04-15-07-58-BD-07-46
03-04-15-07-58-BD-07-46
03-04-15-07-58-BD-07-46
03-04-15-07-58-BD-07-46
03-04-15-07-58-BD-07-46
83-04-15-07-58-BD-07-46
83-04-15-07-58-BD-07-46
83-04-15-07-58-BD-07-46
83-04-15-07-58-BD-07-46
03-04-15-07-58-BD-07-46
04-2F-34-0D-1D-15-08-46
04-2F-34-0D-1D-15-08-46
04-2F-34-0D-1D-15-08-46
84-1D-1D-15-DC-17-09-46
84-23-DC-17-F8-18-0A-46
84-23-DC-17-F8-18-0A-46
84-0D-F8-18-D0-1A-0B-46
04-22-D0-1A-94-1C-0C-48
04-22-D0-1A-94-1C-0C-48


Is that correct?

Thanks!!      

Please have a look in the device profile.
If the profile specifies that a sensor must follow a certain sequence of pages, you can rely on this.
If the profile doesn't specify a sequence, you can't rely on it.

Cheers,
OMB      

Thank You
Really there isn't a sequence provides data transmission in the HRM profile. In the PDF Profile no sequence is not set
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