Now it sends data to server in Write Without Response mode. This increase the transmission speed and it get adapted to MIDI over BLE protocol.
Some devices needs a first message with confirmation for clean security flags. After a connection or after an error, the first message is sended like Write (with response).
(UNTESTED)
Connect() method is simplified. Only one client connection by object is allowed now. If any connection step fails during connection setup, this client is deleted and reset. This deleted client doesn't ocupe for NIMBLE_MAX_CONNECTIONS count now.
Some Serial.print() traces was commented.
Now NotifyCB() doesn't check space available in rx buffer.