Friday, October 14, 2016
Wednesday, June 01, 2016
Converting unix epoch to datetime in streaming analytics
sample input:
query: DATEADD(millisecond, CAST([Timestamp] as bigint), '1970-01-01T00:00:00Z') as timeFromString
this will result in '1970-01-03T07:09:18.032Z' which is wrong!
you can correct this by modifying the input so its strips the quotes from the epoch
and modifying the query so it omits the cast (where the bug resides): DATEADD(millisecond, epochtime, '1970-01-01T00:00:00Z') as time
this will result in the expected result: 2016-06-01T12:00:05.968Z
{
"Key": "Dryer_Sensor",
"State": "0.8",
"Timestamp": "1464782405968",
"Site": "Bir57",
"EventProcessedUtcTime": "2016-06-01T13:24:49.4517020Z",
"PartitionId": 0,
"EventEnqueuedUtcTime": "2016-06-01T12:00:06.4520000Z",
"IoTHub": {
"MessageId": "7e6d0379d85046f295c0cdaeaabe25d8",
"CorrelationId": null,
"ConnectionDeviceId": "openhab",
"ConnectionDeviceGenerationId": "635957210185596241",
"EnqueuedTime": "0001-01-01T00:00:00.0000000",
"StreamId": null
}
}query: DATEADD(millisecond, CAST([Timestamp] as bigint), '1970-01-01T00:00:00Z') as timeFromString
this will result in '1970-01-03T07:09:18.032Z' which is wrong!
you can correct this by modifying the input so its strips the quotes from the epoch
{
"Key": "Dryer_Sensor",
"State": "0.8",
"Timestamp": "1464782405968",
"epochtime": 1464782405968,
"Site": "Bir57",
"EventProcessedUtcTime": "2016-06-01T13:24:49.4517020Z",
"PartitionId": 0,
"EventEnqueuedUtcTime": "2016-06-01T12:00:06.4520000Z",
"IoTHub": {
"MessageId": "7e6d0379d85046f295c0cdaeaabe25d8",
"CorrelationId": null,
"ConnectionDeviceId": "openhab",
"ConnectionDeviceGenerationId": "635957210185596241",
"EnqueuedTime": "0001-01-01T00:00:00.0000000",
"StreamId": null
}
}and modifying the query so it omits the cast (where the bug resides): DATEADD(millisecond, epochtime, '1970-01-01T00:00:00Z') as time
this will result in the expected result: 2016-06-01T12:00:05.968Z
Friday, April 22, 2016
Friday, April 08, 2016
Registering a device in Azure IoT Hub
Using Node.js
npm install -g iothub-explorer@latestiothub-explorer <connection string> create MyDevice
source
Using Device Explorer
See: azure iot sdk on githubFriday, February 26, 2016
Installing Z-Wave Stick Gen 5 on Windows IoT Core
I am currently fiddling around with Windows 10 IoT Core on a raspberry Pi. I wanted to use Z-Wave to be able to control a Fibaro Wall Plug (http://www.fibaro.com/uk/the-fibaro-system/wall-plug)
But I could not find the Z-Stick that was on the supported hardware list of windows iot core
so I bought a Z-Wave Aeon Labs Z-Stick USB Controller - Gen5.
the following steps will explain how to get it working for windows iot core
Step 1
Download the drivers here: http://aeotec.com/z-wave-usb-stick/1358-z-wave-drivers.html
step 2
Connect to tou you raspberry e.g. \\freyr\c$\Data\Users\Administrator\Documents
and unzip and copy the drivers
step 3
connect using powershell
[freyr]: PS C:\Data\Users\Administrator\Documents>
freyr]: PS C:\Data\Users\Administrator\Documents> dir
Directory: C:\Data\Users\Administrator\Documents
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a---- 8/24/2015 8:34 PM 8424 uzb.cat
-a---- 8/24/2015 8:34 PM 710 uzb.inf
[freyr]: PS C:\Data\Users\Administrator\Documents> devcon dp_add .\uzb.inf
....
Driver package 'oem0.inf' added.
[freyr]: PS C:\Data\Users\Administrator\Documents>
[freyr]: PS C:\Data\Users\Administrator\Documents> devcon status usb*
...
USB\VID_0658&PID_0200\5&3753427A&0&4
Name: USB Serial Device
Driver is running.
...
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