KC868A-4 RF433MHz decoding.

[franco.demei@gmail.com]

your receiver pin define is wrong.  it should be mySwitch.enableReceive(digitalPinToInterrupt(19));  //IO19
you can use this 433MHz receive arduino code for A4 board directly: https://www.kincony.com/forum/showthread.php?tid=1641

You Right,  the code is with interrupt (19). I make mistache coping the code.

Code:

#include <RCSwitch.h>

RCSwitch mySwitch = RCSwitch();

void setup() {
  Serial.begin(9600);
   mySwitch.enableReceive(digitalPinToInterrupt(19)); //IO19
  Serial.print("begin test");
}

void loop() {
  if (mySwitch.available()) {
   
    Serial.print("Received ");
    Serial.print( mySwitch.getReceivedValue() );
    Serial.print(" / ");
    Serial.print( mySwitch.getReceivedBitlength() );
    Serial.print("bit ");
    Serial.print("Protocol: ");
    Serial.println( mySwitch.getReceivedProtocol() );

    mySwitch.resetAvailable();
  }
}

 
Even with correct interrupt address (19) I don't see anything  to the serial monitor
The Arduino IDE is connnected to the KC868 via USB port (com5) I suppose we use same port to monitoring the Board activity.