Unable to read custom message type

[jdifig]

Hi, I'm trying to communicate with a NEO-M9V from a linux terminal and I'm having a bit of trouble. Right now I need to poll the Sensor Fusion Initialization Data(UBX-MGA-SF-INI), but this message type is not available in the current pyubx2 library. In the script below, I'm trying to custom write the message type and its definition to get around this, but I'm still getting a KeyError. If someone could explain whats going on I'd really appreciate it. At the bottom is the traceback.

import serial
import pyubx2 as ubt
from pyubx2 import UBXReader, UBXMessage, U1, U2

ubt.UBX_MSGIDS[(0x13, 0x10, 0x00)] = "MGA-SF"

payload_def = {
    "type": U1,
    "version": U1,
    "nValA": U1,
    "nValB": U1,
    "age": U2,
    "groupreserved0": (
        90,
        {
            "reserved0": U1
        }
    ),
    "groupreserved1": (
        "nValA",
        {
            "reserved1": U1
        }
    ),
    "groupreserved2": (
        "nValB",
        {
            "reserved2": U1
        }
    )
}
ubt.UBX_PAYLOADS_POLL["MGA-SF"] = {"type": U1}
ubt.UBX_PAYLOADS_SET["MGA-SF"] = payload_def
ubt.UBX_PAYLOADS_GET["MGA-SF"] = payload_def

with serial.Serial('/dev/ttyACM0', 38400, timeout=1) as ser:

    ubr = UBXReader(ser)
    print("Waiting for response...")
    for (raw_data, parsed_data) in ubr:
        if parsed_data.identity == 'ESF-STATUS':
            if parsed_data.fusionMode == 0:
                print("Passed test1")
                msg = UBXMessage(0x13, 0x10, msgmode=2, type=0x00)
                print(msg)
                ser.write(msg.serialize())
        if parsed_data.identity == 'MGA-SF':
            print("Passed test2")
            print(parsed_data)
            break
        else:
            print(parsed_data)

---

Passed test1
Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/pyubx2/ubxmessage.py", line 472, in _get_dict
    pdict = UBX_PAYLOADS_POLL[self.identity]
            ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
KeyError: 'MGA-1310-NOMINAL'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/mnt/getConfiguration/GetCalibration.py", line 45, in <module>
    msg = UBXMessage(0x13, 0x10, msgmode=2, type=0x00)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/pyubx2/ubxmessage.py", line 112, in __init__
    self._do_attributes(**kwargs)
  File "/usr/lib/python3.11/site-packages/pyubx2/ubxmessage.py", line 135, in _do_attributes
    pdict = self._get_dict(**kwargs)  # get appropriate payload dict
            ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/pyubx2/ubxmessage.py", line 484, in _get_dict
    raise UBXMessageError(
pyubx2.exceptions.UBXMessageError: Unknown message type b'\x13\x10', mode POLL. Check 'msgmode' setting is appropriate for data stream

[semuadmin]

Hi @jdifig

MGA-SF poll should hopefully be resolved by #201, but I haven't had time over the past couple of weeks to test it properly.

I'll do my best to get to it within the next couple of days. Watch this space.

In answer to your specific issue, unfortunately pyubx2 cannot support dynamically-created payload definitions.

[semuadmin]

FYI Support for MGA-SF types now available in v.1.3.0 - https://github.com/semuconsulting/pyubx2/releases/tag/v1.3.0

[jdifig]

Thank you so much this makes things significantly easier!