Page 367 - ARM Based Microcontroller Projects Using MBED

14.5 PROJECT 3—ANDROID—NUCLEO BOARD COMMUNICATION USING BLUETOOTH 353

FIG. 14.21 Finding the IP address of the ESP-01.

FIG. 14.22 Block diagram of the project.

14.5.4 Circuit Diagram
The HC-06 (see Fig. 14.23) is a four-pin serial Bluetooth module having the following
features:
• +3.3 to +6V operation
• 30mA unpaired current (10mA matched current)