Ayuda con este error (THE `BYTE` keyword in no longer supported)

Algo asi compañero?

Gracias.

int analogValue2, analogValue5, val2, val5;
void setup()
{
// start serial port at 19200 bps
Serial.begin(19200);
}
void loop()
{
// read analog input
analogValue2 = analogRead(2);
analogValue5 = analogRead(5);
val2 = map(analogValue2, 0, 1023, 253, 0); // 254 and 255 for SYNC
val5 = map(analogValue5, 0, 1023, 253, 0);

Serial.write(val2);

Serial.write(val5);

delay(150);
}