We are trying to get the engine speed from cluster which we have implemented in qt-qml by using command in qemu "afb-client-demo -H ws://localhost:30007/api?token=x low-can get {"event": "messages.engine.speed"}"

we have added following code in cluster-dashboard qml:

property string api_str: "low-can"
property string verb_str: "subscribe"
property var msgid_enu: { "call":2, "retok":3, "reterr":4, "event":5 }
property string request_str: ""
property string status_str: ""

property double speed_val: 2
property double engineSpeed: 1

WebSocket {
id: websocket
url: bindingAddress

onTextMessageReceived: {
var message_json = JSON.parse (message);
if (message_json[0] === msgid_enu.event) {

var property_name = message_json[2].event.split("/")[1]
if(property_name === "messages.vehicle.average.speed")

{ speed_val = message_json[2].data.value }

else if (property_name === "messages.engine.speed")

{ engineSpeed = message_json[2].data.value }

}
else
{
if (message_json[0] !== msgid_enu.retok)

{ console.log ("Return value is not ok !") return }

}
}
onStatusChanged: {
if (websocket.status == WebSocket.Error)

{ status_str = "Error: " + websocket.errorString }

else
if (websocket.status == WebSocket.Open) {
status_str = "Socket opened; sending message..."
if (verb_str == "subscribe")

{ request_str ='[' + msgid_enu.call + ',"99998","' + api_str '/' verb_str +'",

{ \"event\" : \"vehicle.average.speed\" }

]';
websocket.sendTextMessage (request_str)
request_str ='[' + msgid_enu.call + ',"99999","' + api_str '/' verb_str +'",

{ \"event\" : \"engine.speed\" }

]';
websocket.sendTextMessage (request_str)
}
} else
if (websocket.status == WebSocket.Closed)

{ status_str = "Socket closed" }

console.log (status_str)
}
active: true
}

 

low-can service is included in packagegroup and its visible in qemu also

we are able to call list verb by using: qemux86-64:~# afb-client-demo -H ws://localhost:30007/api?token=x low-can list 

but while calling "get "or "write"verb with arguments its showing response below:

qemux86-64:~# afb-client-demo -H ws://localhost:30007/api?token=x low-can get {"event": "messages.engine.speed"}
usage: afb-client-demo [options]... uri [api verb [data]]
afb-client-demo -d [options]... uri [verb [data]]

allowed options
-b, --break Break connection just after event/call has been emitted.
-d, --direct Direct api
-e, --echo Echo inputs
-h, --help Display this help
-H, --human Display human readable JSON
-k, --keep-running Keep running until disconnect, even if input closed
-p, --pipe COUNT Allow to pipe COUNT requests
-r, --raw Raw output (default)
-s, --sync Synchronous: wait for answers (like -p 1)
-t, --token TOKEN The token to use
-u, --uuid UUID The identifier of session to use
Example:
afb-client-demo --human 'localhost:1234/api?token=HELLO&uuid=magic' hello ping

 

Please help with correct method to call verb with argument or suggest anything which we are missing.