official accessories/Bluetooth module HC05

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The Bluetooth module HC05 is available in the Micro Python Store.

Most of the content on this page is derived from Turbinenreiter's forum post

Resources

• Product details
• Schematic and detailed specification

Pins

The physical pins of the UART busses are:

UART(4) is on XA: (TX, RX) = (X1, X2) = (PA0, PA1)
UART(1) is on XB: (TX, RX) = (X9, X10) = (PB6, PB7)
UART(6) is on YA: (TX, RX) = (Y1, Y2) = (PC6, PC7)
UART(3) is on YB: (TX, RX) = (Y9, Y10) = (PB10, PB11)
UART(2) is on: (TX, RX) = (X3, X4) = (PA2, PA3)

Connections

Connect the module to the pyboard as follows:

pyb | hc05
3V3 | VCC
GND | GND
RX  | TX
TX  | RX

Modules

No custom modules are required, use the UART module:

from pyb import UART

uart = UART(1, 9600)                         # init with given baudrate
uart.init(9600, bits=8, stop=1, parity=None) # init with given parameters

Then use the following to send the REPL to the UART you created above

pyb.repl_uart(uart)

Connecting to your PC

Windows

TODO

Ubuntu

Bluetooth - Set up new device - choose the device - Pin options '1234' - Next. Get the modules MAC address:

hcitool scan

Add the serial port by editing the file: /etc/bluetooth/rfcomm.conf

rfcomm0 {
    bind no;
    device MAC address of your module;
    channel 1;
    comment "Serial Port";
}

Then connect it with:

sudo rfcomm connect 0

Watch it with:

screen /dev/rfcomm0