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Problem when connecting BLE 4.x device and BLE 5.0 device at same time

Need support.

 

I am using lierda S98B module together with Nordic S140 SoftDevice as master. So far everything works fine. I can connect up to 4 devices with BLE 4.2. Also I can connect up to 4 devices with BLE 5.0.

 

But after connecting a BLE 4.x device once no more devices with BLE 5.0 can be connected. If configure BLE_BAS_CONFIG_LOG_LEVEL 4 following debug message can be found:

 

00> <info> app: Start Service Discovery

00> <debug> nrf_ble_gq: Purging request queue with id: 1

00> <debug> nrf_ble_gq: Registering connection handle: 0x0001

00> <debug> ble_db_disc: Starting discovery of service with UUID 0xFFF0 on connection handle 0x1.

00> <debug> nrf_ble_gq: Adding item to the request queue

00> <debug> nrf_ble_gq: GATTC Primary Services Discovery Request

00> <debug> nrf_ble_gq: SD is currently busy. The GATT request procedure will be attempted                       again later.

00> <debug> nrf_ble_gq: Processing the request queue...

00> <debug> nrf_ble_gq: GATTC Primary Service Discovery Request

00> <debug> nrf_ble_gq: SD is currently busy. The GATT request procedure will be attempted                           again later.

00> <debug> nrf_sdh_ble: BLE event: 0x11.

 

Anyone can help ?

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