HW: nRF52, PCA10056
SW: SDK15
I'm using the nus_c service with multiple central connections.
After change the GATT Write operations from BLE_GATT_OP_WRITE_CMD to BLE_GATT_OP_WRITE_REQ, then call "ble_nus_c_string_send()" function, it always return "NRF_ERROR_BUSY".(success to discovery service and enable notification)
Using the same peripheral and controlling it by the nRFConnect, everything works well.
Here are some codes for your reference, and please help me to solve the problem.
main.c
ble_nus_c.c