After update 0.67 homeassistant, zhimi.humidifier.ca1 causes homeassistant frontend to be stuck at loading screen. Just endless loading wheel spinning.
2018-04-14 16:02:22 ERROR (Recorder) [homeassistant.components.recorder.util] Error executing query: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
2018-04-14 16:04:21 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 4, 21, 887184, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=51, use_time=31235 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=46, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}
2018-04-14 16:04:52 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 4, 52, 817734, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=46, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=47, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}
2018-04-14 16:05:23 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 5, 23, 874920, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=47, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=50, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}
2018-04-14 16:06:25 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 6, 25, 889368, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=50, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=51, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}
2018-04-14 16:06:56 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 6, 56, 937392, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=51, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=53, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}
2018-04-14 16:07:27 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 7, 27, 807794, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=53, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=54, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}
2018-04-14 16:07:58 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 7, 58, 847152, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=54, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.7, child_lock=False, supported_features=1, humidity=57, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}
2018-04-14 16:08:29 ERROR (MainThread) [homeassistant.components.websocket_api] Unable to serialize to JSON: <bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>> is not JSON serializable
{'event': {'origin': 'LOCAL', 'time_fired': datetime.datetime(2018, 4, 14, 7, 8, 29, 803302, tzinfo=<UTC>), 'data': {'entity_id': 'fan.xiaomi_air_humidifier', 'old_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.7, child_lock=False, supported_features=1, humidity=57, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>, 'new_state': <state fan.xiaomi_air_humidifier=off; depth=50, hardware_version=None, mode=auto, speed=0, led_brightness=0, model=zhimi.humidifier.ca1, target_humidity=70, dry=True, trans_level=0, friendly_name=가습기, buzzer=True, speed_list=<bound method XiaomiAirHumidifier.speed_list of <Entity xiaomi_air_humidifier: off>>, button_pressed=0001, temperature=21.8, child_lock=False, supported_features=1, humidity=58, use_time=31244 @ 2018-04-14T16:01:46.917722+09:00>}, 'event_type': 'state_changed'}, 'id': 2, 'type': 'event'}