ANT Forum

Hi,

We are running the v1.0.0 S310 stack on a Nordic nRF51422 processor supporting simultaneous connections to a BLE mobile device and an ANT Heartrate belt.

Very infrequently, the BLE mobile application will stop receiving notifications from the nrf51422 while an ANT HRM belt is connected. If the ANT belt connection is lost, the nrf422 goes into a search mode attempting to reconnect with the belt. If only the BLE connection is active (i.e. no ANT HR belt), the BLE notifications are received with no issues.

The ANT connection parameters are 4Hz ANT HRM and the BLE peripheral connection parameters are 30msec connection interval, 720msec supervisory connection timeout, 0 slave latency.

Is there any chance simultaneously running ANT search (to find the ANT HRM belt) while the BLE connection is active can impact the BLE link?

Thanks!
     

Hi,

As the two protocols must share the same radio and on-air time, there will always be some interference. You can try to adjust the settings to give certain BLE or ANT behaviors different priorities using the "sd_ant_coex_config_get" and "sd_ant_coex_config_set" commands.

Cheers