Sorry i didn't answer earlier, I was really busy.
The wiring is as follows at the attachment (the power is set to bath using an Y).
Working receive code:
#include <RCSwitch.h>
RCSwitch mySwitch = RCSwitch();
void setup() {
Serial.begin(9600);
mySwitch.enableReceive(0); // Receiver on inerrupt 0 => that is pin #3
Serial.print("Boot ok ");
}
void loop() {
Serial.println("Listen ok ");
delay(500);
if (mySwitch.available()) {
int value = mySwitch.getReceivedValue();
if (value == 0) {
Serial.print("Unknown encoding");
} else {
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();
}
}
}
Sample output (transmitted from pi 1 time protol 1 
):
Listen ok
Received 123 / 24bit Protocol: 5
Listen ok
Received 123 / 24bit Protocol: 5
Listen ok
Received 123 / 24bit Protocol: 5
Listen ok
Non working transmit code:
#include <RCSwitch.h>
RCSwitch mySwitch = RCSwitch();
void setup() {
Serial.begin(9600);
Serial.print("Boot ok ");
mySwitch.enableTransmit(10);
}
void loop() {
Serial.println("Send ok ");
delay(500);
mySwitch.send(1234,24);
}
I see both (arduino and pi) using same library, it seems it must work... but don't 
Any idea?
