The physical layer configuration is handled by the Strategy entity, if you want to communicate bi-directionally on a single medium (using SoftwareBitBang, OverSampling or AnalogSampling), sharing transmission and reception line, use:

 PJON<SoftwareBitBang> bus;

With this setup it is possible to communicate in PJON_HALF_DUPLEX with up to 254 different devices on the same wire. If for some reason you need to keep separate the two lines, for example if using cheap radio transmitter and receiver modules, to which you have to connect two wires:

 PJON<OverSampling> bus;
 bus.strategy.set_pins(11, 12);

If you don't need bidirectional communication and you have only the transmitter on one side and the receiver on the other side you can use the PJON_NOT_ASSIGNED constant:

 PJON<OverSampling> bus;
 bus.strategy.set_communication_mode(PJON_SIMPLEX); // Tell PJON we want to operate in simplex mode
 bus.strategy.set_pins(11, PJON_NOT_ASSIGNED); // Only receiver

See the readme of the strategy you are using to have additional information on its dedicated physical layer configuration.

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