Wireshark has announced support for the Bluetooth Mesh Beacon, PB-ADV, Provisioning PDU and Proxy Bluetooth mesh protocols.
Wireshark is a protocol analyser that takes packets and decodes into human readable data. It’s usually used with other hardware and software as the last stage in processing captured data. For example, you can use Wireshark with the Nordic nRF sniffer, on Adafruit hardware and on Linux.
In the case of Bluetooth mesh, data packets are encrypted. In fact, data is double encrypted in that first the data is encrypted and then the packets. This means that while you can capture packets you can only see the packet types and Bluetooth mesh metadata. You won’t be able to decrypt the actual data. It’s more useful for determining the type and size of traffic for mesh traffic optimisation.
Read about Beacons and the Bluetooth Mesh