Debug-logging without using Serial.print and without WiFi
Yes, what version of Arduino are you using?


For Arduino Mega, you can use Serial.println for writing debug data and Serial1.println for communication with HC-05. (See Example: MultiSerial Example)
For other Arduino boards, you can use Serial.println for writing debug data and SoftwareSerial library for communication with HC-05. (See Example: SofwareSerial)