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Bluetooth module HC-05

Index: MOD-02569

Blootooth v2.0 + EDR class 2 module works with 3.3 V, communicates via serial interface UART (RX, TX pins), supports AT commands. Maximum transmitter power is + 4 dBm, receiver sensitivity is - 85 dBm.

€8.58
€6.98 tax excl.

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Product description: Bluetooth module HC-05

Simple communication system based on Blootooth HC-05 v2.0 + EDR module. It communicates through UART serial interface using AT commands. It works with a voltage of 3.3 V, which means that a voltage converter is required to operate with 5 V platforms (e.g. Arduino Uno or Leonardo).

In addition to the HC-05 module, there are also some on the board:

  • LED diode, connected to the status pin PIO1 (when lit, it signals correct connection),
  • the KEY pin connected to the PIO3 pin,
  • resistors protecting UART interface lines - 1 kΩ,
  • supply voltage stabilizer 5 V -> 3.3 V,
  • capacitors filtering the supply voltage,
  • soldered goldpin connectors, enabling the module to be connected to the contact plate or connected by wires.

Connection

In order to start the module, the supply voltage must be connected: 5 V to pin marked 5.0 or 3.3 V to pin marked 3.3. The module will be detected by the computer as an unknown chip or HC-05, to pair the two devices you need to enter a password: 1234. A virtual COM port will appear in the system, through which you can transfer data using any terminal. The board has UART serial interface leads - RX and TX pins, which can be connected e.g. to Arduino or to a computer via FTDI adapter.

Although there are projects in the network where HC-06 system is directly connected to 5 V pins, e.g. Arduino Uno, for safety reasons we recommend using 3.3 V - 5 V converter .

Communication can be tested by pairing the module with a computer and connecting the board via FTDI converter. In two windows of the terminal, select appropriate communication ports and specify the transmission speed 9600 bps. If the configuration is correct, the text sent from one terminal will appear on the other.

Configuration of the module is done by popular AT commands, to enter this mode you have to connect KEY output up to 3.3 V. Examples of commands are

  • AT - connection testing, in response you get OK.
  • AT+NAME - returns the device name.
  • AT+NAME=XXX - changes module name to XXX.
  • AT+UART - returns UART interface configuration, three values separated by commas: speed, stop bit, parity.
  • AT+UART=9600.0.0 - changes the configuration of the UART interface: transmission speed 9600, 1 stop bit, no parity.

Note that the command must be followed by crlf characters. The full set of commands can be found in the module documentation.

Bluetooth module specification

  • Power supply voltage:
    • 5 V through built-in stabilizer - connection to pin 5.0
    • 3.3 V - connection to pin 3.3
  • The outputs work with 3.3 V
  • Power consumption:
    • Pairing 80 mA
    • Transmission: 8 mA
  • Class 2 - transmitter power max + 4 dBm
  • Range: up to 10 m
  • Standard: Bluetooth 2.0 + EDR
  • SPP profile with settings via AT commands
  • Communication: UART (RX, TX)
  • Default pairing code: 1234
  • Small dimensions: 37 x 17 mm

Same day shipping

Posting the payment for the order on our account on a business day up to 10 AM means sending the goods on the same day!

The time of payment depends on the ELIXIR's hours session of the sender's bank and the recipient of the transfer. It may take up to 2-4 working days.

Free delivery for orders exceeding 300 PLN!

Only for prepaid orders shipped to Poland.

Terms of delivery outside of Poland

GLS - zone 1

Austria, Belgium, Croatia, The Czech Republic, Denmark, Germany, Netherlands, Slovakia

  • Delivery time: 2-4 days
  • Delivery cost: 35 PLN
  • Insurance: 5000 PLN
GLS - zone 2

Bulgaria, Estonia, France, Hungary, Italy, Latvia, Lithuania, Luxembourg, Portugal, Romania, San Marino, Slovenia, The United Kingdom

  • Delivery time: 2-5 days
  • Delivery cost: 50 PLN
  • Insurance: 5000 PLN
Kurier GLS - zone 3

Finland, Greece, Ireland, Liechtenstein, Serbia, Spain, Switzerland, Sweden

  • Delivery time: 2-7 days
  • Delivery cost: 80 PLN
  • Insurance: 5000 PLN

Terms of delivery in Poland

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Poczta Polska
  • Delivery time: 1-3 days
  • Payment in advance: od 9,90 PLN
  • Cash on delivery: 17,90 PLN
  • Insurance: 1000 PLN
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Kurier GLS
  • Delivery time: 1-2 days
  • Payment in advance: od 14,90 PLN
  • Cash on delivery: 22,90 PLN
  • Insurance: 6000 PLN
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Paczkomaty 24/7
  • Delivery time: 1-3 days
  • Payment in advance: od 12,90 PLN
  • Over 8000 parcel lockers
  • Insurance: 200 PLN
  • Free delivery of orders over 300 PLN does not apply to parcels addressed outside of Poland.
  • The delivery period is counted in working days from the date of dispatch of the order.

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