I have six ESP-WROOM-32D boards and six NRF24L01 modules. Each ESP-WROOM-32D board is connected to one NRF24L01 module. I want three NRF24L01 modules (which I would call the "Sender" for these three specifically) to send a "Hello" message to the other three NRF24L01 modules (which I would call the "Receiver" for each of these three specifically) simultaneously. In addition to receiving the "Hello" message, these "Receiver" modules should send a "Howdy" message to the "Sender" modules. What is a good starter code for each "Sender" and every "Receiver" in Arduino IDE?

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Transmission media

A communication channel that transmits data from a source to a recipient is referred to as "transmission media." Electromagnetic impulses are used to transmit data. Transmission media's primary purpose is to transmit data in the form of bits via a local area network (LAN). In data transport, it is the physical link that connects the transmitter and receiver. Transmission medium is part of layer 1 or physical layer of the ISO/OSI (Open System Interconnection) model.