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Bluetooth module HC-05
Module Bluetooth v2.0 + EDR, class 2. It works with a voltage of 3.3 V and communicates over a serial UART interface (RX, TX), supports the AT command. Maximum transmitter power is + 4 dBm, receiver sensitivity - 85 dBm.
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Bluetooth module HC-05
A simple communication system based on Bluetooth module HC-05. It communicates via the serial UART interface using AT commands.
In addition to the module HC-05, on the board is:
- status LED: connected to the status PIO1 (24) lead indicating a proper connection
- soldered goldpin connectors: to attach module to the breadboard or connect using wires.
- EN pins: (switches the system to the AT commands mode) and STATE (connected to the status PIO1 - pin 24 lead).
Connection
To start the module, you must connect the supply voltage to a pin marked VCC. The module will be detected by the computer as unknown system or HC-05, to pair both devices, you need to enter the password:1234. In the system will appear a virtual COM port, through which, using any terminal, tha data can be transmitted. The board has leads of the serial interface UART - pins TX and RX that you can connect, for example, to Arduino or the computer via the FTDI adapter.
Despite the fact that in the network available are projects, in which the HC-05 system is connected directly to the 5 V pins, for example, Arduino Uno. For security, we recommend the useof a voltage converter 3.3 V - 5 V. |
Communication can be tested by pairing the module with the computer and connecting the board using theFTDI converter. In two terminal's windows, you should select appropriate communication ports and also specify the speed of the 9600 bps transmission. If the configuration is correct, the text is sent from one terminal and it will appear on the second.
Configuration of the module is via the popular AT commands, to enter this mode, you need to connect the WAKEUP lead to 3.3 V. Examples of the commands:
- AT- connection testing, in return we get "OK".
- AT+BAUD1- it sets the speed to 9600 bps.
Examples of the commands
- AT: - connection testing, in return we get "OK".
- AT+BAUD1: - it sets the speed to 9600 bps.
The instructions needs to be sent without the sign of end of the line. More commands can be found in thedocumentation.
Specification od Bluetooth module HC-05
- Voltage: 3.6 V-6 V connected to the VCC pin
- Communication leads are working with voltage 3.3 V (tolerate 5 V)
- Current consumption: approx. 50 mA
- Class 2 - maximum transmitter power + 4 dBm
- Range: up to 10 m
- The password for pairing: 1234
- Standard: Bluetooth 2.0 + EDR
- The SPP profile with possibility to configure via AT commands
- Communication: UART (RX, TX)
- Small dimensions: 37 x 16 mm
Useful links
| Name | Value |
|---|---|
| Width | 7.5 cm |
| Height | 9 cm |
| Depth | 0.5 cm |
| Weight | 0.009 kg |
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30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
Complaints
If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
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Instructions and documents
GPSR data
Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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