Board Wemos Mini D1 What pin to use to work properly

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Serial Abnormal output

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As long as it is started, it will output, even if the keyboard is not connected

#include <PS2Keyboard.h>
#include <ps2dev.h>

#define D0 16

#define D1 5
#define D2 4

#define D3 0
#define D4 2
#define D5 14
#define D6 12
#define D7 13
#define D8 15

PS2Keyboard keyboard_r;
//PS2dev keyboard(D1 , D2); //clock, data

void setup() {
// put your setup code here, to run once:
delay(1000);
keyboard_r.begin(D3, D1); // DataPin, IRQpin
Serial.begin(9600);
Serial.println("Keyboard Test:");

}

void loop() {
// put your main code here, to run repeatedly:
// if (keyboard_r.available()) {
// uint8_t s;
// // s = keyboard_r.readScanCode();
// s = keyboard_r.read();
// if (s){
//erial.println(s, HEX);
//keyboard.write(s);

// }

}

// }