# MAC command DeviceTimeReq supported?

**URL:** <https://www.thethingsnetwork.org/forum/t/mac-command-devicetimereq-supported/19785>\
**Category:** v2 Backend\
**Created:** [November 14, 2018, 3:00pm UTC](https://www.thethingsnetwork.org/forum/t/mac-command-devicetimereq-supported/19785 "2018-11-14T15:00:45Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![arjanvanb](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/arjanvanb/32/46626_2.png) [@arjanvanb](https://www.thethingsnetwork.org/forum/u/arjanvanb)\
**Post date:** [November 15, 2018, 10:22am UTC](https://www.thethingsnetwork.org/forum/t/mac-command-devicetimereq-supported/19785/8 "2018-11-15T10:22:19Z")

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As an aside: the V2 stack is open source 😉

[https://github.com/TheThingsNetwork/ttn/blob/v2.10.0/core/networkserver/uplink\_mac.go](https://github.com/TheThingsNetwork/ttn/blob/v2.10.0/core/networkserver/uplink_mac.go) shows nothing that relates to this. Of course, it could be hidden elsewhere, but as this uses [https://github.com/brocaar/lorawan/blob/master/mac\_commands.go](https://github.com/brocaar/lorawan/blob/master/mac_commands.go), one can peek into that code to reveal the name would be just as expected:

```auto
DeviceTimeReq CID = 0x0D
DeviceTimeAns CID = 0x0D

```

Hence, it’s safe to assume that a search for `DeviceTimeReq` in the `ttn` repository would return some results, if implemented.

That said, @htdvisser, the V3 stack is still closed, right?

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