assert unpack_pkt(pack_pkt(0x34, ['0x00'])) == ['0x00']
assert unpack_pkt(pack_pkt(0x00, ['0x00'])) == ['0x00']
assert unpack_pkt(pack_pkt(0x12, ['0x00'])) == ['0x00']
assert unpack_pkt(pack_pkt(0x34, ['0x00'])) == ['0x00']
assert unpack_pkt(pack_pkt(0x00, ['0x00'])) == ['0x00']
assert unpack_pkt(pack_pkt(0x12, ['0x00'])) == ['0x00']