Hi all,

When I open the IoTS devicemgt ui to view the realtime statistic data of my 
raspberry pi device, I always get below error, so that the graph can now show 
any temperature line. Can anyone help me? Thanks.

WebSocket connection to 
'wss://192.168.2.109:9443/secured-outputui/org.wso2.iot.devices.temperature/1.0.0?token=ecd222ae10d959deb02d3bf2b8f6&deviceId=1iukwdj4luwxe&deviceType=raspberrypi'
 failed: WebSocket opening handshake was canceled

------
Zhanwen Zhou (Jason)
+86 13922218435
[email protected]
Guangzhou Smart Cloudex Technology Co., Ltd.
Business: API Management, IOT

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