https://devzone.nordicsemi.com/f/nordic-q-a/83190/the-state-of-radioI am doing a ble project with three roles exist simultaneously, slave, scanner and broadcaster. i used the &#39;ble_radio_notification_init&#39; and a rtc to see when the radio is up. And i find that the connection heart packet inerval is about 500ms, while theen-USTelligent Community 13Thu, 30 Dec 2021 03:01:39 GMThttps://devzone.nordicsemi.com/thread/345418?ContentTypeID=1Thu, 30 Dec 2021 03:01:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:45f3cbe2-a9d6-4f76-a043-21c1663b9228Deya<p>Thank you for your answer. In my application, i want to change another device&#39;s state according to BLE&#39;s role.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/345368?ContentTypeID=1Wed, 29 Dec 2021 13:34:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:31ecda6d-46d8-46cb-b51e-42e42a23cff5Hung Bui<p>Hi Deye,&nbsp;</p> <p>I don&#39;t think there is an API to get the current state of the radio. Using the radio notification and calculate the radio active time to determine the state is the closest you can do in my opinion.&nbsp;</p> <p>May I ask what&#39;s the reason you want to detect the radio activity for your application ?&nbsp;</p><div style="clear:both;"></div>