Hello,
I've been testing remote events on EMS based on example.lua, but never succeeded..
With scripts below, I can successfully connect to TW platform and bind to a local Thing.
I can add remote services (Add and FireExampleEvent) from "Browse Remote Services" on the platform,
and actually testing "Add" service works perfectly.
However, "FireExampleEvent" service never works, and returns
Unable to Invoke Service FireExampleEvent on LSR_VM_002 : null
I can see no remote events from "Browse Remote Events", but it seems to be natural because we have no definition of events in the lua scripts like services.
So I manually added a remote event "ExampleEvent", and its datashape is ExampleEvent, which has value, label, count and time fields.
But still going wrong...
I used "PCEMS" from DevWorx and version of TW platform is 6.5.
I would really appreciate if you could give me any advice.
Regards,
S.Yamabe
config.json
{
"ws_servers": [{
"host": "hostname (not localhost)",
"port": 80
}],
"appKey": "appkey",
"ws_connection": {
"encryption": "none",
"verbose": true
},
"logger": {
"level": "WARN",
"publish_directory": "D:/EMSDemo/logs/",
"publish_level": "WARN",
"max_file_storage": 2000000,
"auto_flush": true
}
}
config.lua
scripts.log_level = "TRACE"
scripts.EdgeThing = {
file = "thing.lua",
template = "example",
identifier = "ident"
}
templates/example.lua
module ("templates.example", thingworx.template.extend)
dataShapes.ExampleEvent(
{ name = "value", baseType = "STRING" },
{ name = "label", baseType = "STRING" },
{ name = "count", baseType = "INTEGER" },
{ name = "time", baseType = "DATETIME" }
)
serviceDefinitions.Add(
input { name="p1", baseType="NUMBER", description="The first addend of the operation" },
input { name="p2", baseType="NUMBER", description="The second addend of the operation" },
output { baseType="NUMBER", description="The sum of the two parameters" },
description { "Add two numbers" }
)
serviceDefinitions.FireExampleEvent(
input { name="value", baseType="STRING", description="String Data For the event" },
output { baseType="NOTHING", description="" },
description { "Fire the ExampleEvent" }
)
services.Add = function(me, headers, query, data)
if not data.p1 or not data.p2 then
return 400, "You must provide the parameters p1 and p2"
end
return 200, data.p1 + data.p2
end
services.FireExampleEvent = function(me, headers, query, data)
if not data.value then
return 400, "You must provide the 'value' parameter."
end
me.example_event_count = (me.example_event_count or 0) + 1
tw_mutex.lock()
local ds = DataShape.ExampleEvent:clone()
tw_mutex.unlock()
local it = tw_infotable.createInfoTable(ds)
local success, err = it:addRow({
value = data.value,
label = me.name,
count = me.example_event_count,
time = os.time() * 1000
})
if err then return 400, err end
return server.fireEvent("ExampleEvent", it:toTable())
end
+ A log file is attached.
