ServerTimestamp #528
Replies: 3 comments 8 replies
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just for testing i took "value_to_datavalue" from ua_utils.py def value_to_datavalue(val, varianttype=None):
"""
convert anyting to a DataValue using varianttype
"""
if isinstance(val, ua.DataValue):
datavalue = val
elif isinstance(val, ua.Variant):
datavalue = ua.DataValue(val)
datavalue.SourceTimestamp = datetime.utcnow()
datavalue.ServerTimestamp = datetime.utcnow()
else:
datavalue = ua.DataValue(ua.Variant(val, varianttype))
datavalue.SourceTimestamp = datetime.utcnow()
datavalue.ServerTimestamp = datetime.utcnow()
return datavalueOn Browse: |
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Where are you? I tried these on master: |
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@oroulet I took your test and added it in simple-server.py. But if you try browsing this node with a client, you got the same decoding error: I tried our Client-Gui as well and got this Traceback: My server-minimal.py codeCode:import logging
import asyncio
import sys
from datetime import datetime
sys.path.insert(0, "..")
from asyncua import ua, Server
from asyncua.common.methods import uamethod
@uamethod
def func(parent, value):
return value * 2
async def main():
_logger = logging.getLogger('asyncua')
# setup our server
server = Server()
await server.init()
server.set_endpoint('opc.tcp://192.168.150.98:4840/freeopcua/server/')
# setup our own namespace, not really necessary but should as spec
uri = 'http://examples.freeopcua.github.io'
idx = await server.register_namespace(uri)
# populating our address space
# server.nodes, contains links to very common nodes like objects and root
myobj = await server.nodes.objects.add_object(idx, 'MyObject')
myvar = await myobj.add_variable(idx, 'MyVariable', 6.7)
my2 = await myobj.add_variable(idx, "meineVar", ua.Variant(23, ua.VariantType.Int64))
# Set MyVariable to be writable by clients
await myvar.set_writable()
await server.nodes.objects.add_method(ua.NodeId('ServerMethod', 2), ua.QualifiedName('ServerMethod', 2), func, [ua.VariantType.Int64], [ua.VariantType.Int64])
_logger.info('Starting server!')
async with server:
d = ua.DataValue(ua.Variant(111111111, ua.VariantType.Int64), ServerTimestamp=datetime.now())
await my2.write_value(d)
print(await my2.read_value())
while True:
await asyncio.sleep(1)
new_val = await myvar.get_value() + 0.1
_logger.info('Set value of %s to %.1f', myvar, new_val)
await myvar.write_value(new_val)
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG)
asyncio.run(main(), debug=True) |
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requirements.txt:
dv = await parse_to_datavalue(item)
if dv is not None:
dv.ServerTimestamp = datetime.utcnow() # <--- without this everything works fine
await server.write_attribute_value(item[0][0].nodeid, dv, ua.AttributeIds.Value)"parse_to_datavalue" returns just a datavalue from "value_to_datavalue" method (ua_utils.py) it just creates the correct Variant from DataType |
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without:
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OK. I could reproduce that one. It seems to also happen on released version... |
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that one fixes it: #529 |
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strange^^ |
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What?!? O.o ... okay ....but ... why? |
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Because the binary encoding was wrong for that class after the change to dataclass |
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from: #526
Writing ServerTimestamp in DataValue causes errors!
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