# Neo Coolcam Plug Z-Wave COMMAND\_CLASS\_SECURITY

**URL:** <https://community.homey.app/t/neo-coolcam-plug-z-wave-command-class-security/22194>\
**Category:** Questions & Help\
**Created:** [December 9, 2019, 11:10pm UTC](https://community.homey.app/t/neo-coolcam-plug-z-wave-command-class-security/22194 "2019-12-09T23:10:45Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rzarajczyk](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rzarajczyk/32/8447_2.png) [@rzarajczyk](https://community.homey.app/u/rzarajczyk)\
**Post date:** [December 9, 2019, 11:10pm UTC](https://community.homey.app/t/neo-coolcam-plug-z-wave-command-class-security/22194/1 "2019-12-09T23:10:45Z")

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Hi, I have two brand new Neo Coolcam Z-Wave Plugs. I experience periodic “hangs” - they stop responding neither to command nor to physical button press. The only thing I can do is to disconnect them from electricity, and plug them in again.

I thought it’s some kind of hardware problem, however when I started looking at z-wave log (from [http://developer.athom.com/tools/zwave](http://developer.athom.com/tools/zwave)), I noticed a lot (every couple of seconds) of COMMAND\_CLASS\_SECURITY commands - I’m not experienced with z-wave, I’m not sure wether it’s correct or not.

Log sample:  
2019-12-09T22:59:55.137Z  
Node[24]: [COMMAND\_CLASS\_SECURITY] {}  
2019-12-09T22:59:55.137Z  
Node[24]: [COMMAND\_CLASS\_SECURITY] [SECURITY\_NONCE\_REPORT] {“type”:“Buffer”,“data”:[39,160,159,194,182,4,127,15]}  
2019-12-09T22:59:55.137Z  
Node[24]: sendData to COMMAND\_CLASS\_SECURITY, params 0x8027a09fc2b6047f0f  
2019-12-09T23:00:05.168Z  
Node[24]: Received application command for COMMAND\_CLASS\_SECURITY, data: 0x40  
2019-12-09T23:00:05.169Z  
Node[24]: [COMMAND\_CLASS\_SECURITY] {}  
2019-12-09T23:00:05.169Z  
Node[24]: [COMMAND\_CLASS\_SECURITY] [SECURITY\_NONCE\_REPORT] {“type”:“Buffer”,“data”:[40,148,133,23,28,36,120,224]}  
2019-12-09T23:00:05.169Z  
Node[24]: sendData to COMMAND\_CLASS\_SECURITY, params 0x80289485171c2478e0  
2019-12-09T23:00:15.150Z  
Node[24]: Received application command for COMMAND\_CLASS\_SECURITY, data: 0x40  
2019-12-09T23:00:15.150Z  
Node[24]: [COMMAND\_CLASS\_SECURITY] {}  
2019-12-09T23:00:15.151Z  
Node[24]: [COMMAND\_CLASS\_SECURITY] [SECURITY\_NONCE\_REPORT] {“type”:“Buffer”,“data”:[42,190,221,43,178,198,122,163]}  
2019-12-09T23:00:15.151Z  
Node[24]: sendData to COMMAND\_CLASS\_SECURITY, params 0x802abedd2bb2c67aa3

Can you tell if this behavior if correct? Can the plug be “flooded” with those commands?

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<div class="post-metadata">

**Author:** ![PetervdK](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/petervdk/32/20669_2.png) [@PetervdK](https://community.homey.app/u/PetervdK)\
**Post date:** [December 10, 2019, 5:42am UTC](https://community.homey.app/t/neo-coolcam-plug-z-wave-command-class-security/22194/2 "2019-12-10T05:42:08Z")

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The newer plugs have a known issue, partly because of the secure status. Read [Neo coolcam powerplug](https://community.homey.app/t/neo-coolcam-powerplug/10599/25) and this [Add Z-Wave device non-secure?](https://community.homey.app/t/add-z-wave-device-non-secure/12406).  
There are a couple of more topics about it, you can use the search for that.

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<div class="post-metadata">

**Author:** ![rzarajczyk](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/rzarajczyk/32/8447_2.png) [@rzarajczyk](https://community.homey.app/u/rzarajczyk)\
**Post date:** [December 23, 2019, 7:10pm UTC](https://community.homey.app/t/neo-coolcam-plug-z-wave-command-class-security/22194/3 "2019-12-23T19:10:16Z")

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Just to close the topic: recent update to Neo Coolcam app made the plug work correctly. They wrote something about disabling secure connection in changelog, probably they addressed exactly mine issue.