QI Data transmission between transmitter and receiver

[aharon.fin]

hi
I want to transfer a small amount of data between QI transmitter and the receiver.
I know it can be done in one direction and the direction is between the receiver to transmitter
But I haven't found a way in the opposite direction.
see atached :

Is there any idea that it would be two-way?

 

[FvM]

QI standard specifies both communication directions, load-modulation for receiver-to-transmitter and frequency-shift keying for transmitter-to-receiver. Review Qi-v1.3 or Qi-v2.0 comms-physical-layer.