ANT Forum

Hi All,


I have a basic question about network key. Is it compulsory to have a network key for the receiver, to make connection to a HRM or any ANT device? . We are making a ANT product by using nRF51422. I tried to connect to a garmin HRM from sample program of "HRM receiver " given in nRF51422. If i tried to connect with public network key.=0 i always fails to connect but with Network key = { 0x__, 0x__, 0x__, 0x__, 0x__, 0x__, 0x__, 0x__ }. I always succeed .

please give me some reference .

thanks
Robin Singh

[Moderator Edit: Removed ANT+ Network key from public post]      

Hi Robin,

Please read the ANT Message Protocol and Usage (5.0) document at 5.2.5 page 19.

You can find this document at the downloads and then the document section. See header ANT documentation.
File name = D00000652_ANT_Message_Protocol_and_Usage_Rev_5.0.pdf

See also : http://www.thisisant.com/developer/ant/licensing/ant-shared-source-license

So yes you need a network key to talk to another device because they need to be the same.

For an ANT+ HR monitor you need the ANT+ network key.
For the public network you do not need to set it (see 5.2.5.2).

Best regards,
Antoine