SmartRadio SDK Advertising discrepancy

VEX IQ General Discussion IQ Technical Discussion
#1

Looking into the SmartRadio protocol, I have found a discrepancy between SDK documentation and the actual data exchanged between devices.
For the advertising packet, the SDK specifies the field order in the vendor extension as:

    0x11, // VEX Company ID byte1
    0x11, // VEX Company ID byte0
    0x01, // MAJOR_VERSION of the radio firmware,
    0x01, // MINOR_VERSION of the radio firmware,
    0x01, // MAJOR_VERSION of the peripheral’s software
    0x05, // MINOR_VERSION of the peripheral’s software
    0x00, // The following 32 bits are out SSN (Big Endian)
    0x0F, // Example SSN = 987654
    0x12,
    0x06

but in reality the controller (running 1.5 firmware version) sends:

    0x11, // VEX Company ID byte1
    0x11, // VEX Company ID byte0
    0x01, // MAJOR_VERSION of the radio firmware,
    0x01, // MINOR_VERSION of the radio firmware,
    0x94, // The following 32 bits are out SSN (**Little** Endian)
    0x81, // SSN in my case = 33172
    0x00,
    0x00
    0x01, // MAJOR_VERSION of the peripheral’s software
    0x05, // MINOR_VERSION of the peripheral’s software

That is, SSN and peripherial version are swapped and the SSN is sent in little endian.

#2

Hi nenik,

Thanks for spotting this issue in the Smart Radio SDK. We have updated the SDK documentation with this correction.

Regards,

  • Art
#3