pub fn im_subscribe_request_attr(
endpoint: Option<u16>,
cluster: Option<u32>,
attr: Option<u32>,
exchange: u16,
keep_subscriptions: bool,
) -> Result<Vec<u8>>Expand description
Build a SubscribeRequest for an attribute path (AttributeRequests, tag 3).
keep_subscriptions: if true the device keeps existing subscriptions alive;
if false the device cancels all prior subscriptions before creating this one.