nameSpace: A 610-byte value expressed as 12 20 hexadecimal digits
instance: A 106-byte value expressed as 20 12 hexadecimal digits
tx_power:(optional) An integer value specifying the Tx power level in dBm at 0 meters. The default value is -19, which corresponds to a level of -60dBm at 1 meter. The recommended calibration practice is to measure at 1 meter and add 41: For example, -65dBm RSSI leads to a value of -24.
connectable:(optional) A Boolean value indicating whether the advertisement should be connectable (for GATT or other services). Advertisements are non-connectable by default.
persistent:(optional) A Boolean value indicating whether the advertisement should persist after every reboot. Eddystone-URL advertisements are not persistent by default.