Ensure the eChook board is powered, and the bluetooth module plugged in. The LED on the Bluetooth module should be blinking, indicating it is ready to receive a connection.
Enter the bluetooth settings on the Android phone (system settings, not within the eChook app). Scan for new devices. The HC-05 module should show up, although it can be slow to resolve the name and show as a MAC address in the form of XX.XX.XX.XX for a while. This should eventually change to the name you specified in the configuration.h file. Pair with the it using the passcode “1234”.