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#include <SoftwareSerial.h>

SoftwareSerial BT(8, 9);
char val;

void setup() {
    Serial.begin(9600);
    BT.begin(38400);
}

void loop() {
    if(Serial.available()){
        val = Serial.read();
        BT.print(val);
    }
    if(BT.available()){
        val = BT.read();
        Serial.print(val);
    }
}