CODEWITHSUNDEEP
pythonhexuuid
exile97
exile97

Reputation: 357

UUID to (hex array?)

I'm following a tutorial and it says the UUID is 65210001-28D5-4B7B-BADF-7DEE1E8D1B6D then he adds it to the code in this format, without explaining how the conversion happened:

// Simple Service UUID: 65210001-28D5-4B7B-BADF-7DEE1E8D1B6D
static struct bt_uuid_128 simple_service_uuid =
    BT_UUID_INIT_128(0x6d, 0x1b, 0x8d, 0x1e, 0xee, 0x7d, 0xdf, 0xba, 0x7b,
             0x4b, 0xd5, 0x28, 0x01, 0x00, 0x21, 0x65);

I'm curious, what format is 0x6d, 0x1b, 0x8d, 0x1e, 0xee, 0x7d, 0xdf, 0xba, 0x7b,0x4b, 0xd5, 0x28, 0x01, 0x00, 0x21, 0x65 exactly? Hex?

How can I get from the UUID to the array? I've tried hex conversions and some other python encoding, but I can't create anything close. I'm looking to do the conversion in python.

Upvotes: 1

Views: 1304

Answers (1)

exile97
exile97

Reputation: 357

Here is the python solution thanks to Patrick Artners help:

    uuid = input('Enter a UUID: ')
    uuid = uuid.replace('-', '')
    uuid = uuid[::-1] #reverse the string
    hexArrayStr = ''
    splitToTwos = map(''.join, zip(*[iter(uuid)]*2))
    count = 0
    for v in splitToTwos:
        count+=1
        hexArrayStr = hexArrayStr + ('0x'+(v[::-1]).lower())
        if count != 16:
            hexArrayStr = hexArrayStr + ', '
    print(hexArrayStr)

prints 0x6d, 0x1b, 0x8d, 0x1e, 0xee, 0x7d, 0xdf, 0xba, 0x7b, 0x4b, 0xd5, 0x28, 0x01, 0x00, 0x21, 0x65

Upvotes: 2

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