BluetoothError: error accessing bluetooth device

[satish.gunjal]

I am using HC-05 bluetooth module. Want to enable two way communication with my android phone. But unable to go pass the device inquiry step... Please help me to make it work....

Python script:

from bluetooth import *

print("performing inquiry...")

nearby_devices = discover_devices()

print("found %d devices" % len(nearby_devices))

for addr, name in nearby_devices:
try:
print(" %s - %s" % (addr, name))
except UnicodeEncodeError:
print(" %s - %s" % (addr, name.encode('utf-8', 'replace')))


Above python script returns error:

Traceback (most recent call last):
File "pi_bt_inquiry.py", line 12, in <module>
nearby_devices = discover_devices()
File "/usr/lib/python2.7/dist-packages/bluetooth/bluez.py", line 17, in discover_devic es
sock = _gethcisock ()
File "/usr/lib/python2.7/dist-packages/bluetooth/bluez.py", line 226, in _gethcisock
raise BluetoothError ("error accessing bluetooth device")
bluetooth.btcommon.BluetoothError: error accessing bluetooth device

[Douglas6]

The HC-05 will appear to the Pi as a serial device, not Bluetooth. You don't need any Bluetooth software on the Pi. Instead, use pyserial to open the serial device at /dev/ttyAMA0. Remember to disable the serial console tty first, using raspi-config. Then pair from the phone with PIN '1234'.

[satish.gunjal]

Thanks Douglas6 ...

Using pyserial i am able to send data from my RP to BlueTerm app on Android phone. But not able receive data in RP.
If possible can you please share some sample script please.

[Douglas6]

Read the pyserial documentation and google for example code.

[bostonpatriot]

The HC-05 will appear to the Pi as a serial device, not Bluetooth. You don't need any Bluetooth software on the Pi. Instead, use pyserial to open the serial device at /dev/ttyAMA0. Remember to disable the serial console tty first, using raspi-config. Then pair from the phone with PIN '1234'.

Hello! Reading this post with interest. I have a Raspberry Pi Model B(2 USB ports). I am attempting to communicate serially with a Basic Stamp II. Have installed Pyserial and raspi-config and also have the newest Adafruit console cable. My questions are:

1) Connections. Do I connect the console cable to the Pi and the Stamp to the Pi's USB via the USB-RS232 adapter?
2) How do I figure out which serial ports would be active for purposes of configuring the appropriate Pyserial entries?

I was able to identify and configure Pyserial using my Windows 7 machine because the COM ports are easy to identify.

Any guidance would be appreciated.

[Douglas6]

You might want to start a new thread; there's little in common between an HC-05 and that console cable. But I would proceed with caution. The Pi, and the console cable, operate at 3v3, the Stamp (as far as I can tell) at 5v. May not work and could cause damage, without level shifting. The cable (if it works) would appear on the Pi as /dev/USB0.