Milk-v RISC-V

[tcpipchip]

Sir,
How are yhou ?

I installed the Misty on my MILK-V DUO S, i used the PIP

When i try to execute the
bc --ini ./bc.ini

I am getting this

[root@milkv-duo]~# bc --ini ./bc.ini
Traceback (most recent call last):
File "/usr/bin/bc", line 577, in
main()
File "/usr/bin/bc", line 557, in main
this_application = WhoIsIAmApplication(
^^^^^^^^^^^^^^^^^^^^
File "/usr/bin/bc", line 57, in init
MSTPSimpleApplication.init(self, *args)
File "/usr/lib/python3.12/site-packages/misty/mstplib/init.py", line 536, in init
self.mux = MSTPMultiplexer(self.localDevice, self.localAddress)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/site-packages/misty/mstplib/init.py", line 433, in init
self.directPort = MSTPDirector(self.localDevice, self.address)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/site-packages/misty/mstplib/init.py", line 205, in init
mstp_lib = cdll.LoadLibrary(libmstp_path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/ctypes/init.py", line 460, in LoadLibrary
return self._dlltype(name)
^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/ctypes/init.py", line 379, in init
self._handle = _dlopen(self._name, mode)
^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: Error relocating /usr/lib/python3.12/site-packages/misty/mstplib/libmstp_agent_linux.so: unsupported relocation type 8
Cleaned up MSTP temp directory

Can you help me ?

[raghavan97]

Hi,

Please compile it on your architecture and install it.

https://github.com/riptideio/misty?tab=readme-ov-file#installation-and-usage-for-developers

That would make sure that the shared library is built for your system.

Thanks.

Bye,
Raghavan V

[tcpipchip]

Hi!!!!!!!!!!!!

The MILK-V Duo S only works with cross-compile...

Can you compile to me ?

[tcpipchip]

got progress on cross-compile...

Please, what means this error ?

I want to use MSTP on ttyS1

thanks

[root@milkv-duo]~# bc --ini ./bc.ini
Initialized the socket
mac_address = 25
max master = 127
baud rate = 38400
max info frames = 1
RS485: Initializing /dev/ttyS1=success!
MS/TP MAC: 19
MS/TP Max_Master: 7F
MS/TP Max_Info_Frames: 1
mstp_path=ttyS1
Traceback (most recent call last):
File "/usr/bin/bc", line 577, in
main()
File "/usr/bin/bc", line 557, in main
this_application = WhoIsIAmApplication(
^^^^^^^^^^^^^^^^^^^^
File "/usr/bin/bc", line 57, in init
MSTPSimpleApplication.init(self, *args)
File "/usr/lib/python3.12/site-packages/misty/mstplib/init.py", line 536, in init
self.mux = MSTPMultiplexer(self.localDevice, self.localAddress)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/site-packages/misty/mstplib/init.py", line 433, in init
self.directPort = MSTPDirector(self.localDevice, self.address)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/site-packages/misty/mstplib/init.py", line 254, in init
self.socket.connect(self.server_address)
FileNotFoundError: [Errno 2] No such file or directory
Cleaned up MSTP temp directory

[tcpipchip]

I had to put some Static values to make it work...

I will do more tests soon

[tcpipchip]

hi,
I found a bacnet mtsp server, wrote in C++
https://github.com/chipkin/bacnetservermstpexamplecpp?tab=readme-ov-file
i executed it...

C:\Users\Miguel\Desktop\bacnetservermstp>BACnetServerMSTPExample_x64_Release.exe COM15 9600 25
CAS BACnet Stack Server MSTP Example v0.0.2.0
https://github.com/chipkin/BACnetServerMSTPExampleCPP
MSTP [serial port] [baud rate] [mac address]

FYI: Using comport=[COM15], Portnr=[14]
FYI: Using macAddress=[25]
FYI: Loading CAS BACnet Stack functions... OK
FYI: CAS BACnet Stack version: 3.19.0.1311
FYI: Connecting serial resource to serial port. baudrate=[9600], ... OK
OK, Connected to port
FYI: Registering the callback Functions with the CAS BACnet Stack
Setting up server device. device.instance=[389999]
Created Device.
Enabling WriteProperty service... OK
Enabling device optional properties. Max_info_frames, max_master... OK
FYI: Sending I-AM broadcast
FYI: Entering main loop...

On bacnet client...

witch parameter i put on bacnet prompt >

?

My milk-v is connected (using RS485) to the PC...

Thanks!

[tcpipchip]

I see that agent was off...
then i changed the Milk-Duo S to run as ARM, not RISC-V...
And...

[tcpipchip]

getting goood progress

[tcpipchip]

Hi, is there some python example, where i can read some analogvalue from BACSERVER, but not using the console. but directly on python source code ?

[raghavan97]

Very good progress.

I recall doing a bacnet client without the Console. I tried looking for it, but could not find it.

But here is the broad idea.

(1) Change the LocalDevice initialization to not use the ini. You can pass the parameters directly.

this_device = LocalDeviceObject(ini=args.ini, **mstp_args)

(2) Remove creating the console. You dont need it anymore.

# make a console
 this_console = BacnetClientConsoleCmd()
 if _debug: _log.debug("    - this_console: %r", this_console)

(3) Now after you make the above changes. You will not have a way to Trigger it, right ? So you can use the PulseTask like this and trigger it.

        class PulseTask(RecurringTask):
            def __init__(self, app, interval=None, offset=None):
                super().__init__(interval, offset)
                self.install_task()
                self.app = app
        
            def process_task(self):
                self.app.fetch_values()
        
          # Use it in the main like this
        
            # make a simple application
            app = BACnetClientApplication(address)
            app.start()
            PulseTask(app, interval=10 * 1000)

The way I tested it was using server from bacnet-stack (https://github.com/bacnet-stack/bacnet-stack).

The bacnet-stack also has a binary bacepics which lists all the objects and the current values.

[tcpipchip]

Can` you fix this code that i tried ?

from misty.mstplib import MSTPSimpleApplication
from bacpypes.object import get_datatype
from bacpypes.apdu import ReadPropertyRequest
from bacpypes.primitivedata import ObjectIdentifier, Unsigned, Real
from bacpypes.constructeddata import Array, Any
from bacpypes.pdu import Address
from bacpypes.local.device import LocalDeviceObject
import time

class MyMSTPClient(MSTPSimpleApplication):
    def __init__(self, ini_file, *args, **kwargs):
        # ini parsing is done by MSTPSimpleApplication base
        super().__init__(ini_file, *args, **kwargs)

    def who_is(self, low_limit=None, high_limit=None):
        # Send Who-Is to discover devices
        self.request_whois(low_limit, high_limit)

    def read_property(self, device_address, obj_type, obj_instance, prop_id):
        # Build ReadProperty request
        object_id = ObjectIdentifier(obj_type, obj_instance)
        apdu = ReadPropertyRequest(
            objectIdentifier=object_id,
            propertyIdentifier=prop_id
        )
        # Destination: device via MS/TP
        dest = Address(device_address)
        iocb = self.request(apdu, destination=dest)
        # Wait / poll for response
        while not iocb.done:
            time.sleep(0.1)
        if iocb.ioError:
            raise RuntimeError(f"I/O Error: {iocb.ioError}")
        return iocb.ioResponse

def main():
    # Path to your ini
    ini = "client.ini"

    # Create local device parameters
    # (MSTP-specific args passed via ini or via kwargs)
    local_device = LocalDeviceObject(ini=ini)

    app = MyMSTPClient(ini_file=ini, localDevice=local_device)

    # Discover devices on the MSTP network
    print("Sending Who-Is...")
    app.who_is()

    # Wait some time to collect Who-Is / I-Am responses
    time.sleep(5)

    # Suppose we discovered a device at MSTP MAC address 10
    target_mac = 10
    obj_type = 'analogInput'   # or 'binaryOutput' etc.
    obj_id = 1
    prop = 'presentValue'

    try:
        print(f"Reading {obj_type} {obj_id} presentValue from device {target_mac}")
        response = app.read_property(target_mac, obj_type, obj_id, prop)
        # response is a BACpypes constructed response object
        print("Response:", response)
    except Exception as e:
        print("Error reading property:", e)

    # Graceful close if needed
    app.shutdown()

if __name__ == "__main__":
    main()

client.ini

[root@milkv-duo]~# cat client.ini
Cpypes]
objectName: MSTPClient
address: 25
interface: /dev/ttyS1
max_masters: 127
baudrate: 38400
maxinfo: 1
objectIdentifier: 599
maxApduLengthAccepted: 1024
segmentationSupported: segmentedBoth
vendorIdentifier: 15

Thanks to the help

[tcpipchip]

then we can include in you samples :)

[tcpipchip]

@raghavan97
Or send your complete example...:)
Thank you again!

[tcpipchip]

In parallel, i did a Python app that make communication with console using PIPE

[tcpipchip]

Communication cool with 2 mstp DEVICES

[raghavan97]

Hi,

I just added a non-console polling bacnet client in the samples. It is self contained. You can pass the device path of the serial device , baudrate etc , it will do whois, find out the points and keep polling them every 10 seconds. It prints and also writes it into a CSV.

You might find it useful.

I would suggest that you start with a new virtual environment, clone and do

pip install .

and run

python samples/polling_bac_client.py

Please note that the directories have been moved around.

Please let me know how it goes