Timer command not working for roborock.vacuum.a15

[moeffju]

Describe the bug
I have a Roborock S7, model roborock.vacuum.a15, which according to the docs should be supporting getting the timers/schedules, but the timer command only returns an empty list.

Version information (please complete the following information):

• OS: macOS
• python-miio: miiocli, version 0.6.0.dev0

Device information:
If the issue is specific to a device [Use miiocli device --ip <ip address> --token <token> info]:

• Model: roborock.vacuum.a15
• Hardware version:Linux
• Firmware version: 4.3.5_1612

To Reproduce
Steps to reproduce the behavior:

• mirobo --ip $VACUUM_IP --token $VACUUM_TOKEN timer

I also tried with genericmiot but couldn't find a timer action or sensor, and calling get_timer didn't work.

Expected behavior
I expect to see the schedules I defined in the Mi Home app.

Console output

# mirobo --ip $VACUUM_IP --token $VACUUM_TOKEN timer
Timezone: Europe/Berlin

#

Debug output:

...
DEBUG:miio.integrations.roborock.vacuum.vacuum_cli:Connecting to 192.168.0.144 with token <redacted>
DEBUG:miio.click_common:Unknown model, trying autodetection
DEBUG:miio.miioprotocol:Got a response: Container:
    data = Container:
        data = b'' (total 0)
        value = b'' (total 0)
        offset1 = 32
        offset2 = 32
        length = 0
    header = Container:
        data = b'!1\x00 \x00\x00\x00\x00\x1e1\x1b4\x00\x00\xb33' (total 16)
        value = Container:
            length = 32
            unknown = 0
            device_id = unhexlify('1e311b34')
            ts = 1970-01-01 12:44:35+00:00
        offset1 = 0
        offset2 = 16
        length = 16
    checksum = b'\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff' (total 16)
DEBUG:miio.miioprotocol:Discovered 1e311b34 with ts: 1970-01-01 12:44:35+00:00, token: b'ffffffffffffffffffffffffffffffff'
DEBUG:miio.miioprotocol:192.168.0.144:54321 >>: {'id': 39, 'method': 'miIO.info', 'params': []}
DEBUG:miio.miioprotocol:192.168.0.144:54321 (ts: 1970-01-01 12:44:35+00:00, id: 39) << {'exe_time': 1,
 'id': 39,
 'result': {'MemFree': 36552,
            'VmPeak': 9260,
            'VmRSS': 1792,
            'VmSize': 9260,
            'ap': {'bssid': '<redacted>',
                   'freq': 0,
                   'rssi': '0',
                   'ssid': '<redacted>'},
            'fw_ver': '4.3.5_1612',
            'hw_ver': 'Linux',
            'ipflag': 1,
            'life': 45875,
            'mac': '<redacted>',
            'miio_client_ver': '4.3.5',
            'miio_times': [45874, 20, 0, 45853],
            'miio_ver': '0.0.9',
            'model': 'roborock.vacuum.a15',
            'netif': {'gw': '<redacted>',
                      'localIp': '192.168.0.144',
                      'mask': '<redacted>'},
            'token': '<redacted>',
            'uid': 1628758708,
            'uptime': 45889}}
DEBUG:miio.device:Detected model roborock.vacuum.a15
DEBUG:miio.miioprotocol:192.168.0.144:54321 >>: {'id': 40, 'method': 'get_timer', 'params': ['']}
DEBUG:miio.miioprotocol:192.168.0.144:54321 (ts: 1970-01-01 12:44:35+00:00, id: 40) << {'exe_time': 10, 'id': 40, 'result': []}
DEBUG:miio.miioprotocol:192.168.0.144:54321 >>: {'id': 41, 'method': 'get_timezone', 'params': []}
DEBUG:miio.miioprotocol:192.168.0.144:54321 (ts: 1970-01-01 12:44:35+00:00, id: 41) << {'exe_time': 10, 'id': 41, 'result': ['Europe/Berlin']}
Timezone: Europe/Berlin