UART to UART

[PandaTheOne]

hey guys!

First, sorry for my bad English.
I'm really new in the micro:bit world. I try to experiment UART.
I have two micro:bit. And I connect them.

my code are :
` #include "MicroBit.h"

MicroBit uBit;
MicroBitSerial serial(MICROBIT_PIN_P1, MICROBIT_PIN_P2);

int main()
{
uBit.init();
uBit.serial.baud(115200);
int c;
c=1;
while (1)
{
uBit.serial.send(int(c));
uBit.sleep(100);
}
}
`

and

` #include "MicroBit.h"

MicroBit uBit;
MicroBitSerial serial(MICROBIT_PIN_P2, MICROBIT_PIN_P1);

int main()
{
uBit.init();
uBit.serial.baud(115200);
int c;
while(1)
{
c=uBit.serial.read(ASYNC);
if(c==1)
{
uBit.display.print("A");
uBit.sleep(100);
}

}
} `

So I just want to write "A" on one micro:bit by sending 1 from the other. but It doesn't work haha
If you have any idea, please help me!

Thank's a lot.