The Hc 05 Bluetooth module is a widely used, inexpensive component that allows microcontrollers and other devices to communicate wirelessly. At the heart of configuring and controlling this module lies the understanding and application of the Hc 05 Datasheet At Commands. These commands, sent as simple text strings, are the key to customizing the module’s behavior, from changing its name and baud rate to setting up secure connections.
Delving into the World of Hc 05 Datasheet At Commands
Hc 05 Datasheet At Commands are a set of instructions that allow you to configure various parameters of the Bluetooth module. These commands are instrumental in customizing the Hc 05 to suit your specific application. You can use them to change the device’s name, set its baud rate for serial communication, configure its role as master or slave, and even set up a PIN code for secure pairing. Understanding these commands is crucial for utilizing the full potential of the Hc 05 module.
AT commands are sent to the Hc 05 module through its serial interface. Typically, you’ll use a microcontroller like an Arduino or a serial terminal program on your computer to send these commands. To enter AT command mode, you usually need to hold down a button on the module while powering it up, or send a specific command to enable it. The specific process will vary slightly depending on the module’s version. Once in AT command mode, the module will respond with “OK” to successful commands, or “ERROR” if the command is invalid or could not be executed.
The AT commands available for the HC-05 can be categorized based on functionality. Here’s a few of the common commands:
- AT - Tests the connection
- AT+VERSION - Returns the firmware version
- AT+RESET - Resets the module
- AT+NAME - Sets or reads the Bluetooth name
- AT+PIN - Sets the PIN code for pairing
The baud rate is one of the most important configurations. Let’s say you want to check its default value.
- Enter AT mode.
- Send the command: AT+UART?
- The module will respond with something like +UART:9600,1,0 indicating baud rate 9600, 1 stop bit, and no parity.
| Command | Description |
|---|---|
| AT+ADDR? | Queries the Bluetooth address |
| AT+ROLE? | Queries the current role (Master/Slave) |
To further explore the specifics of each command, their parameters, and possible return values, consult the Hc 05 Datasheet. Within the datasheet, you’ll find a comprehensive listing and explanation of all the available AT commands, empowering you to fine-tune your Bluetooth communication setup.