I was not able to run the ControlPanel.output_control() before I changed the class OutputControls into the following form:

class OutputControls:

    def __init__(self, controls):
            self.controls = controls

    def build_data(self) -> bytes:
            data = bytearray()
            # for control in controls:
            for control in self.controls:
                    # data.extend(control.build_data())
                    data.append(control)
            return bytes(data)

What do you think?

I have created a new Debian installation on a PI 4.
I have installed using pip install -U osdp
It installs successfully into the python2.7/site-packages/osdp
When I enter python and try to run

from osdp import *
Traceback (most recent call last):
File <"stdin>". line 1, in
File"home/pi/.local/lib/python2.7/site-packages/osdp/init.py", line 14 in from .-types_import(
File "/home/pi/.local/lib/python2.7/site-packages/osdp/_types.py", line 39
def init(self, sequence: init, use_crc: bool, has_security_control_block: bool):
^
SyntaxError: invalid syntax

I am trying to use the library with a hat. I am using GPIO 14&15 and using RTS (GPIPO 17) as the direction change. I can see data on the UART, no state change to change the direction on the RS485 transceiver.
Is there a method to change the transceiver direction. I realise if you are using a USB 485 transceiver this is not an issue, or it is handle directly by the hardware.

E.g. How to setup & send a command.

Following your example code python throws a name error:
conn = SerialPortOsdpConnection(port='/dev/tty.wchusbserial1420', baud_rate=9600)
NameError: name 'SerialPortOsdpConnection' is not defined
I'm not python expert but it seems that all classes in the packare are private (due to the underscore naming)
also tried different import methods but failed - any help welcome

I have a connected PD device, but it's not clear how to receive real card data from my card reader.

In _device.py _secure_channel somewhere is called _secureChannel and server_random_number is serverRandomNumber.

Hi Ryan,

I've been inspired by your project, and im trying to create a OSDP control panel with some OSDP readers i have laying around.
However when i try to add multiple devices the serial port is blocked while waiting for the device to respond (this is when device is offline).
cp.add_device(connection_id=bus_id, address=2, use_crc=False, use_secure_channel=False) cp.add_device(connection_id=bus_id, address=1, use_crc=False, use_secure_channel=False)

The traceback looks like this:
Traceback (most recent call last): File "C:\Users\Kenneth\PycharmProjects\OSDP\venv\lib\site-packages\osdp\_bus.py", line 95, in run_polling_loop reply = self.send_command_and_receive_reply(data, command, device) File "C:\Users\Kenneth\PycharmProjects\OSDP\venv\lib\site-packages\osdp\_bus.py", line 158, in send_command_and_receive_reply raise TimeoutError("Timeout waiting for reply message") TimeoutError: Timeout waiting for reply message

Could you please advice in case im doing something silly?
Thank you in advance!

So the newer Spec has deprecated the Master key approach (I don't have the Spec).

I was wondering if there is any plan to update this amazing framework to support SCBK