# Parking Sensor with TTN Gateway

**URL:** <https://www.thethingsnetwork.org/forum/t/parking-sensor-with-ttn-gateway/12016>\
**Category:** TTKG - The Things Kickstarter Gateway\
**Created:** [January 24, 2018, 11:20pm UTC](https://www.thethingsnetwork.org/forum/t/parking-sensor-with-ttn-gateway/12016 "2018-01-24T23:20:16Z")\
**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:** [January 25, 2018, 5:02pm UTC](https://www.thethingsnetwork.org/forum/t/parking-sensor-with-ttn-gateway/12016/8 "2018-01-25T17:02:09Z")

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> [@bryansmith](#):
>
> what are the first 2 digits(prefix) of the dev-addr of your sensor?

Good call: [it’s 0x70030051](https://runkit.io/avbentem/lorawan-packet-decoder/branches/master?data=gFEAA3CABAABrBXBDVqhFYB8), which has not been assigned yet:

> [@LoRaWAN duty cycle abuse](https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945/27):
>
> `0x70` is not allocated yet.

Also, TTN will indeed not handle it, regardless any `--override`.

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