ble_upgrade.ino

byte inbuff[255];
byte outbuff[255];

#define rate 115200

void setup() {
  Serial.begin(rate);
  while (!Serial) ;
  Serial1.begin(rate);
  while (!Serial1);
  delay(500);
  Serial.println("I'm ready for update.");
}


void loop() {
	int i=0,x=0;
	while (Serial.available()) {
		inbuff[i]=Serial.read();
		i++;
	}
	for(x=0;x<i;x++){
		Serial1.write(inbuff[x]); 
	}


	int j=0;
	while (Serial1.available()) {
		outbuff[j]=Serial1.read();
		j++;
	}
	for(x=0;x<j;x++){
		Serial.write(outbuff[x]); 
	}

}