How to decode the transmitting power value

1

Hi,

I received a scan response beacon data match this format below:

transmittingpower
transmittingpower1376×449 27.6 KB

I received value 0x09 at the Transmitting Power field.

  • What is the 0x09 mean? Is it 0dBm, 2dBm or anything else?
  • Is there any table to match the value to actual dBm transmitting power?

Thanks.
Paul

2

Please check EIR Data Type, Advertising Data Type (AD Type) and OOB Data Type Definitions from Bluetooth SIG.

0x09 - Complete Local Name

Do you want to get RSSI or TX power? Please check bit "发射功率"for TX power

3

Hi,

I would like to check TX power.

In the received binary message, according to the data payload structure above, the TX power value is 0x09.
I have no idea what it means. Is it mean 9dBm? How do i interpret this 0x09?

Thanks.
Paul

4

The advertising data struct is a custom format. You should check with the vendor about what means is 0x09. Or you can try to change the TX power for the beacon and see the bit changes.

5

I see.

I thought that data structure is defined by your team.

Thanks a lot for your support.
Paul