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Feature

Intelligent ControlUsing the Arduino HC-05ZS-040Bluetooth module, you can easily implement projects like "Android Smartphone & Laptop Control/ LED Controller/ Bluetooth Arduino RECEIVE data + Chart/ Android-Controlled Arduino Bluetooth Servo Door Lock".
Master or Slave ConfigurationHC-05 Bluetooth module provides switching mode between master and slave mode which means it able to use either receiving or transmitting data.
AT ModePress the button, the module enter the AT mode. AT commands are executed only in AT mode.
💡NoteThe line between the Arduino TX transmit pin which has five volts output and the Bluetooth module RX receive pin which supports only 3.3 volts needs to be connected to a voltage divider in order not to burn the module. On the other hand, the line between the Bluetooth module TX transmit pin and the Arduino RX receive pin can be connected directly.
Package included 1 * Arduino Bluetooth Module hc 05, 1 * White LED.

Description

How to use the hc 05 Bluetooth module for controlling Arduino via Bluetooth communication?

We are here to help you implement all the projects above.

Module parameters:

1.PCB Size: 37.3mm (Long) *15.5mm (wide)
2. Weight: 3.5g
3. Input voltage: 3.6V--6V, prohibit exceeding 7V
4. Leads 6 feet: EN/VCC/GND/RXD/TXD/STATE (Bluetooth state leads, not connected output low level, the output high level of connection)
5. With the connection status indicator, LED flash indicates no Bluetooth connection; Led slow flash indicates enter at command mode
6. On-board 3.3V voltage regulator chip, input voltage DC 3.6V-6V; When not paired, current about 30mA (due to LED lights flashing, current in the state of change); After the pairing succeeds, the current is about 10mA
7. Effective transmission distance of 10 meters in open area, more than 10 meters is possible, but not to ensure the quality of the connection
8. After pairing succeeds, can be used as a full duplex serial port. No need to understand any Bluetooth protocol, but only support 8-bit data bits, 1-bit stop bits, no parity communication format. This is also the most commonly used communication format, does not support other formats!
9. Press the key and then power up the Bluetooth module to enter at mode, set parameters, query information
10. Can switch host and machine mode from a command
11. The module default baud rate is 9600, the default pairing password is 1234, the default name is HC-05