Raw Data

Question

After clicking on Raw Data in Nrf connect App I am getting this 0x0201041AFF590000150112233445566778899AABBCCDDEEFF0FFFFFFFFC3. what are 0201041AFF these bytes ? can I remove it?

Aleksander Nowakowski · Answer

Hello, 
 The advertising packet and scan response data are built using LTV (Length-Type-Value) format (similar to TLV, but Length comes first). 
 You may read more in Core Bluetooth specification 5.2 , Vol 3, Part C, Chapter 11, Supplement to the Bluetooth Core Specification (the same link), chapter 1. The IDs of available types are listed here: https://www.bluetooth.com/specifications/assigned-numbers/generic-access-profile/ 
 Each entry starts with Length, in bytes, of the following type + data. Length of type is always 1 (can be extended in the future). 
 The raw data you scanned: 0x0201041AFF590000150112233445566778899AABBCCDDEEFF0FFFFFFFFC3 are split into entries the following way (nRF Connect for Android also displays this in the table below the raw data): 
 Len Type. Value 0x02 0x01 (Flags) 0x04 - BR/EDR Not Supported 0x1A. 0xFF (Manufacturer Data) 0x59000000150112233445566778899AABBCCDDEEFF0FFFFFFFFC3 
 The Supplement to Bluetooth Core Specification 4.1+ defines the first 2 bytes of Manufacturer data as Company ID. 
 The Manufacturer Data are encoded using application format, in this case nRF Beacon format, or something similar. 
 0x5900 - Nordic Semiconductor ASA Company ID ( https://www.bluetooth.com/specifications/assigned-numbers/company-identifiers/ ), in Little Endian 0x00 - beacon type - this should be 0x02, actually 0x15 - length of the rest of payload 0x01 12233445566778899AABBCCDDEEFF0 - the UUID: 01122334-4556-6778-899A-ABBCCDDEEFF0 0xFFFF - major number 0xFFFF - minor number 0xC3 - the calculated RSSI signal at 1m, in dBm = -61 dBm