ANTWAREII searches much faster than my nRF51422

[Paul]

In my test, with the same configuration, ANTWARE II always searches much faster than nRF51422 software.

For example. I have Master channel and Slave channel set up at 4Hz. Use one of my nRF51422 board as the master channel. Use ANTWARE II as the slave, after I pressed "Auto-Open" button on the screen, it tracks to the master almost right away. But if I use a 51422 as the slave, it takes up to 3 seconds to track to the master.

Is ANTWAREII using different settings for searching? My channel setups are mostly copied from nRF SDK samples.

Thanks

[Petter Myhre]

1.5 seconds on average and 3 seconds as maximum is expected with the nRF51422 as a slave, with a message period of 4 Hz on the master.

I'm not sure how ANTWARE II is searching, but it may be using High Duty Search since it is using an USB device. nRF51422 can't use High Duty Search. For more information, please see Page 58 and Page 80 in the ANT Message Protocol and Usage, Rev 5.1.

You may be able to reduce the search time by changing the search waveform, but I haven't tested this myself. For more information, please see sd_ant_search_waveform_set() and Page 70 ANT Message Protocol and Usage, Rev 5.1.

[Paul]

Thanks Petter. I am working on this right now :-) sd_ant_search_waveform_set() did the trick. default is 316, I set it to 97 as ANT datasheet suggested. Now it tracks much faster.

[Paul]

P.S. I think ANT II is using 97 too. Be aware. any number other than 316 or 97 may not work because the searching algorithm Dynastream is using.