如何在 ESP32 上的 MicroPython 中检索和格式化 wifi MAC 地址?

How to retrieve and format wifi MAC address in MicroPython on ESP32?

我在 ESP32 上有以下 MicroPython 代码 运行:

import network

wlan_sta = network.WLAN(network.STA_IF)
wlan_sta.active(True)

wlan_mac = wlan_sta.config('mac')
print("MAC Address:", wlan_mac)  # Show MAC for peering

输出如下所示:

MAC Address: b'0\xae\xa4z\xa7$'

我想以更熟悉的六对十六进制数字格式显示它,如下所示:

MAC Address: AABBCC112233

在网上搜索解决方案后,我试过:

print("MAC Address:", str(wlan_mac)) 但显示与不使用 str()

时相同

print("MAC Address:", hex(wlan_mac)) 但会导致 TypeError: can't convert bytes to int

print("MAC Address:", wlan_mac.hex()) 但它说 AttributeError: 'bytes' object has no attribute 'hex'

我也对从 wlan_sta.config('mac') 检索到的字节有点怀疑。我本以为看起来更像 b'\xaa\xbb\xcc\x11\x22\x33' 而不是 b'0\xae\xa4z\xa7$'。 z 和 $ 对于应该是十六进制的东西来说似乎非常不合适,对于应该是六对数字的东西来说似乎太短了。

所以我的问题有两个方面:

  1. 我获取 MAC 地址的方法是否正确?
  2. 如果正确,如何将其格式化为六对十六进制数字?

I am also a little suspicious of the bytes retrieved from wlan_sta.config('mac'). I would have expected something that looked more like b'\xaa\xbb\xcc\x11\x22\x33' instead of b'0\xae\xa4z\xa7$'. The z and the $ seem very out of place for something that should be hexadecimal and it seems too short for what should be six pairs of digits.

您返回的不是十六进制字符串,而是字节字符串。因此,如果 MAC 地址包含值 7A,则字节字符串将包含 z(其 ASCII 值 122(十六进制 7A))。


Am I using the correct method to get the MAC address?

你是!

If it is correct, how can I format it as six pairs of hex digits?

如果要将 MAC 地址打印为十六进制字符串,可以使用 ubinascii.hexlify方法:

>>> import ubinascii
>>> import network
>>> wlan_sta = network.WLAN(network.STA_IF)
>>> wlan_sta.active(True)
>>> wlan_mac = wlan_sta.config('mac')
>>> print(ubinascii.hexlify(wlan_mac).decode())
30aea47aa724

或者也许:

>>> print(ubinascii.hexlify(wlan_mac).decode().upper())
30AEA47AA724