I wrote some days ago to Polar to ask information about bluetooth belt. They are very kind and answered me very quickly with useful informations I think.
I write here the answer of Mr Christer of Polar Electro Europe.
I hope is useful for you.
and thank you for your additional informations.
Classical Bluetooth from Polar require license agreement, which would not be an option for your group / solution.
Looks like some open source / sw guys / group solving some own issues over internet ?
Do you have some company founded or is it just for fun ?
Well anyway, below more information about the Polar H7
There is nowadays a Polar H7 Bluetooth smart product available (since 2nd of April in Retail channel).
This unit works with all Bluetooth smart ready items.
As of 2nd of April we have started to selling new heart rate sensor H7 Bluetooth smart (Bluetooth v4.0) which is compatible with eg. iPhone 4S.
iPhone 4S is the first iphone which allows to use freely Bluetooth signal.
H7 Heart rate sensor is using standard services ( heart rate-, battery and device information services).
I am sure you should base your project on this.
More information about the Bluetooth services you can find from this link: http://developer.bluetooth.org/gatt/...sticsHome.aspx