conn can be: rfcomm, ble122, nrf51, cc254x
addr can be "dense" or separated, bt/cc254x/0123456789ab or
bt/rfcomm/11-22-33-44-55-66 or bt/ble122/88:6b:12:34:56:78
conn can be: rfcomm, ble122, nrf51, cc254x
addr can be "dense" or separated, bt/cc254x/0123456789ab or
bt/rfcomm/11-22-33-44-55-66 or bt/ble122/88:6b:12:34:56:78