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"""Utilities for RPC devices."""
from __future__ import annotations
# The Bluetooth MAC address is the primary MAC address plus 2.
# https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/misc_system_api.html#mac-address
def bluetooth_mac_from_primary_mac(primary_mac: str) -> str:
"""Get Bluetooth MAC from primary MAC.
MAC address must be in format "[0-F]{16}"
:param primary_mac: Primary MAC address
:return: Bluetooth MAC address
"""
return f"{(int(primary_mac, 16) + 2):012X}"
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