In my plan I have a rf moudle NRF24l01 , this is not important, so , If you see in figure 1 we have radio masts that send waves in around. we can't accept this. my plan for control wave direction is on the figure 2. like ultrasonic ,but how?
In my plan I have a rf moudle NRF24l01 , this is not important, so , If you see in figure 1 we have radio masts that send waves in around. we can't accept this. my plan for control wave direction is on the figure 2. like ultrasonic ,but how?
