nRF52 SDK16 device discovery problem in iOS

[Lakshmikanth Satyavolu]

Hi Community, 

Recently I have started testing my BLE peripheral running HRS with iPhone. My device is running SDK16 on nRF52 SoC. This is working perfectly with Android mobiles. \

I searched the community for this issue and found below thread which mentioned MTU size exchange could be a problem.  

https://devzone.nordicsemi.com/f/nordic-q-a/66256/nrf52-sdk16-service-discovery-doesn-t-happen-on-ios

But MTU exchange is present in nrf_ble_gatt_on_ble_evt callback as shown below. 

case BLE_GATTS_EVT_EXCHANGE_MTU_REQUEST:
on_exchange_mtu_request_evt(p_gatt, p_ble_evt);
break;

I have attached nRF connect log for reference. Can someone help me understand what could be the issue? 

NRF logs.eml

Best

Lakshmikanth. 

[Simonr]

Hi

Additionally to toggling the airplane mode off and on, you should also clear the cache by forgetting devices in the phones Bluetooth settings if any, as well as "delete bonding info" or "forget device" in the nRFConnect app. I don't remember what the iPhone app says exactly.