NRF24L01 TRANSMITER - maximum distance test

//
// https://www.youtube.com/c/LeventeDaradici/videos
//

    #include <SPI.h>
    #include <nRF24L01.h>
    #include <RF24.h>
    RF24 radio(9, 10); // CE, CSN, MOSI=11, MISO=12, SCK=13
    const byte address[6] = "00001";
    char text1[32] = "ON";
    char text2[32] = "OFF";

    void setup() {
      radio.begin();
      Serial.begin(9600);
      radio.openWritingPipe(address);
      radio.setPALevel(RF24_PA_MAX,1); //can set: RF24_PA_MIN, RF24_PA_LOW, RF24_PA_HIGH, RF24_PA_MAX
      radio.setDataRate(RF24_250KBPS); //set as: F24_250KBPS, F24_1MBPS, F24_2MBPS ==>250KBPS = longest range
      radio.setChannel(120); //sets channel from 2.4 to 2.524 GHz in 1 MHz increments 2.483.5 GHz is normal legal limit
      radio.stopListening();

    }
    void loop() {
      Serial.print(" PA Level:");
      Serial.println(radio.getPALevel());
      Serial.print(" DATA rate:");
      Serial.println(radio.getDataRate());

      radio.write(&text1, sizeof(text1));
      delay(500);

      radio.write(&text2, sizeof(text2));
      delay(500);
    }