Master - Slave using SPI communication (Tinkercad) - arduino

Question

Need your help again: I'm doing this time Master - Slave Using SPI communication, there is no error in the code when I simulate the code but the LED won't turn on.
The supposed outcome that should happen is that when I push the push button on master board the LED on the slave board will turn on.
Master code:
// Master Board
#include <SPI.h>
#define button1 4
#define SS 10
int buttonvalue;
int x;
void setup(void) {
Serial.begin(115200); //set baud rate to 115200 for usart
digitalWrite(SS, HIGH); // disable Slave Select
SPI.begin ();
SPI.setClockDivider(SPI_CLOCK_DIV8); //divide the clock by 8
}
void loop(void) {
digitalWrite(SS, LOW);
buttonvalue = digitalRead(button1);
if (buttonvalue == HIGH) {
x = 1;
} else {
x = 0;
}
digitalWrite(SS, HIGH);
delay(1000);
}
Slave code:
// Slave Board
#include <SPI.h>
#define led1 2
volatile byte Slavereceived;
volatile boolean received;
int x;
void setup(void) {
Serial.begin(115200);
pinMode(2, OUTPUT);
pinMode(MISO,OUTPUT);
SPCR |= _BV(SPE);
received = false;
SPI.attachInterrupt();
}
ISR (SPI_STC_vect) {
Slavereceived = SPDR;
received = true;
}
void loop() {
if (received) {
if (Slavereceived == 1) {
digitalWrite(led1, HIGH);
} else {
digitalWrite(led1, LOW);
}
delay(1000);
}
}

Answer 1

I too was stuck in the same situation, there is no support for the SPI library in tinkercad, you can include it without errors, and even use it, but any useful command will let the code stuck at that command
Sorry, but there no much you can do
this link if for a tinkercad forum, where one of the people said SPI library amoung two others are not supported

Answer 2

Add SPI.transfer(x); below the if else to your master code.
The master code will look somewhat like this:
// Master Board
#include <SPI.h>
#define button1 4
#define SS 10
int buttonvalue;
int x;
void setup(void) {
Serial.begin(115200); //set baud rate to 115200 for usart
digitalWrite(SS, HIGH); // disable Slave Select
SPI.begin ();
SPI.setClockDivider(SPI_CLOCK_DIV8); //divide the clock by 8
}
void loop(void) {
digitalWrite(SS, LOW);
buttonvalue = digitalRead(button1);
if (buttonvalue == HIGH) {
x = 1;
} else {
x = 0;
}
SPI.transfer(x);
digitalWrite(SS, HIGH);
delay(1000);
}