Bluetooth sending data

Projects Programming
1

hello. my project using 2 Bluetooth for transmit and receive. for transmitter send the value of voltage to receiving Bluetooth and display LCD.
how to send the value and receive the value command?
Transmitter.ino (898 Bytes)
receiver.ino (624 Bytes)

2

Send: BT_Serial.println(voltage);
Receive: voltage = BT_Serial.parseInt();