Home Assistant python script to check for dead Z-Wave devices

check_zwave_devices.py

checkTime = datetime.datetime.now() - datetime.timedelta(hours=24)

for entity_id in hass.states.get('group.zwave').attributes['entity_id']:
    entity = hass.states.get(entity_id)

    if entity is not None:
        lastSeen = datetime.datetime.strptime(entity.attributes['receivedTS'][:-5], '%Y-%m-%d %H:%M:%S')

        if entity.attributes['is_failed'] or lastSeen < checkTime:
            msg = entity.attributes['friendly_name'] + ' is AWOL'
            logger.error('%s', msg)
            service_data = {'message': msg}
            hass.services.call("notify", "notify_devices", service_data, False)