BLE Throughput

Invalid date

1. Change default device interval time from 7.5ms to 30ms
2. Added waiting device response time 250ms, if no response then send next.
3. Packet size can be test up to 251 bytes
4. Modified receive test data length to use received packet size.
5. Modified request MTU size for 5 times to prevent failure
6. Modified little endian
7. Added connection interval by notification