How to get current state for devices

Configuration
1

Dear,
I have connected broadlink rm mini 3, and am controlling devices with it.
I cant get current states like on/off of my devices controlled by broadlink rm mini3.
please guide me how to get current state of my devices.
when my AV reciever(Onkyo), Android tv Box(Mini M8sii),samsungtv are already playing, status on my Homeassistant is like,

Screenshot%20from%202018-04-04%2008-30-12
Screenshot%20from%202018-04-04%2008-30-121600×900 172 KB

Please Guide me to get current state.
Thanks in adv.

2

Communication in this instance is one way. There is no confirmation that the device is on or off, hence the state of the device is assumed based on the last command that was sent to it.

To get real state feedback would require some other interface such as power monitoring.