# Differences Basic Station and TTN JSON messages

**URL:** <https://www.thethingsnetwork.org/forum/t/differences-basic-station-and-ttn-json-messages/35219>\
**Category:** Gateways\
**Created:** [March 10, 2020, 2:19pm UTC](https://www.thethingsnetwork.org/forum/t/differences-basic-station-and-ttn-json-messages/35219 "2020-03-10T14:19:05Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![robertlie](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/robertlie/32/37681_2.png) [@robertlie](https://www.thethingsnetwork.org/forum/u/robertlie)\
**Post date:** [March 10, 2020, 2:19pm UTC](https://www.thethingsnetwork.org/forum/t/differences-basic-station-and-ttn-json-messages/35219/1 "2020-03-10T14:19:05Z")

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I can install Basic Station on the RAK831 and connect it to TTN (LNS). Sensor data can be sent to the LNS and the end node can receive downlink message from the LNS.

However I noticed a few differences:

1. When a class A downlink message is sent from TTN to Basic Station, the JSON message has a DevEui field which contains “00-00-00-00-00-00-00-00”. Here an actual example, formatted for readability:

2. The LNS sends the following message:

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