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greatscottgadgets / ubertooth

Software, firmware, and hardware designs for Ubertooth
https://greatscottgadgets.com/ubertoothone/
GNU General Public License v2.0
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How to send more than 21 bytes with cmd_le_set_adv_data? #350

Closed evanslify closed 3 years ago

evanslify commented 5 years ago

Steps to reproduce

  1. Try sending more than 21 bytes with cmd_le_set_adv_data

Expected behaviour

I'm trying to send an LE ADV_IND with length of over 21 bytes. Tried overwriting LE_ADV_MAX_LEN but seems like ubertooth's firmware(?) won't take it either.

Actual behaviour

It says "LE advertising data too long".

Version information

Operating system: Fedora 29

Ubertooth tools version (ubertooth-rx -V): libubertooth 1.1 (git-0adf33e*)

libbtbb version: libbtbb 1.0 (2017-03-R2)

Ubertooth firmware version (ubertooth-util -v): 2018-12-R1

mossmann commented 5 years ago

I'm confused as to why LE_ADV_MAX_LEN is set to 21 and why the firmware limits packet length similarly, so I'm hoping @mikeryan can shed some light on it.