CODEWITHSUNDEEP
bluetooth-lowenergyadsiot
Robin
Robin

Reputation: 53

BLE Advertising RawData - How to decode?

I have a E66 Fitness band connected to a gateway and the band does connect to the gateway and I receive data on MQTT. But I am unsure on how to decode the RawData format, can someone help me with that? Thanks 

{
      "TimeStamp":"2020-05-30 16:44:32",
      "DataFormat":"RawData",
      "BLEMac(hex)":"E5F604C2EAAE",
      "RSSI(dBm)":-30,
      "BLEName":"E67 EAAE",
      "RawData(hex)":"02010610FF107803E8000000000000640023290009094536372045414145"
  }

Upvotes: 4

Views: 10692

Answers (1)

Youssif Saeed
Youssif Saeed

Reputation: 13345

BLE data is decoded as follows:-

  • 1st byte = length (n bytes)
  • 2nd byte = Types
  • n-1 bytes = actual data

And this repeats over the whole raw data. You can find the meaning of raw data here. Going over your example:-

1st Set:

  • 02: Length: 2 Bytes
  • 01: Type: Flags
  • 06: Flag - 02 && 04: LE General Discoverable && BR/EDR Not Supported

2nd Set:

  • 10: Length: 16 bytes
  • FF: Type: Manufacture Data
  • 107803E80000000000006400232900: Data specific to the manufacturer

3rd Set:

  • 09: Length: 9 bytes
  • 09: Type: Complete Local Name
  • 4536372045414145: E67 EAAE (Name of device in ASCII)

I hope this helps.

Upvotes: 15

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