# TTN Modiin upgrade

> Here arethe three purchases for ttn modiin . The Antenna I am told that people have got 70km using SF12 and this antenna Lets see if it what I get SF12 is not u

- Type: Community update
- Community: [The Things Network Modiin](https://www.thethingsnetwork.org/community/modiin/)
- Author: Arie Lashansky
- Published: 2019-03-28
- Web page: https://www.thethingsnetwork.org/community/modiin/post/ttn-modiin-upgrade

Here arethe three purchases for ttn modiin .
The Antenna I am told that people have got 70km using SF12 and this antenna Lets see if it what I get SF12 is not useful it takes too much time and low baude rate.

A heat sink for the rak831
https://sketchfab.com/3d-models/lora-gateway-draft-cefeb9d0d7014f11a42d530f176ce139

This will allow me to remove the forced air cooling Fan and pasive cooling.

The relays are for my first commercial product Off grid secure dry contacts with a multi year lifetime on bank of18650 .
lifespan Based on one status change per day. ( Lora class A or B)

Arie