# Problem defining data rate for lora comunication

**URL:** <https://www.thethingsnetwork.org/forum/t/problem-defining-data-rate-for-lora-comunication/68147>\
**Category:** LMIC\
**Created:** [June 4, 2024, 6:34pm UTC](https://www.thethingsnetwork.org/forum/t/problem-defining-data-rate-for-lora-comunication/68147 "2024-06-04T18:34:31Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ricsrdocasro](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/r/858c86/32.png) [@ricsrdocasro](https://www.thethingsnetwork.org/forum/u/ricsrdocasro)\
**Post date:** [June 4, 2024, 6:34pm UTC](https://www.thethingsnetwork.org/forum/t/problem-defining-data-rate-for-lora-comunication/68147/1 "2024-06-04T18:34:32Z")

</div>

Hey all, as I have a mobile end device (tracker), I wanted to disable ADR and define a spreading factor value, but I tried all of the variables since DR\_SF7 to 12 and DR\_SF7CR to 12 and even DR\_NONE and DR\_SF8C and it always goes to the spreading factor of 10. Not that this SF doesn’t suit my needs, but I wanted to understand why this happens. I’m using AU-915 to comunicate to my gateway.

---

<div class="post-metadata">

**Author:** ![Jeff-UK](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeff-uk/32/35697_2.png) [@Jeff-UK](https://www.thethingsnetwork.org/forum/u/Jeff-UK)\
**Post date:** [June 4, 2024, 9:18pm UTC](https://www.thethingsnetwork.org/forum/t/problem-defining-data-rate-for-lora-comunication/68147/2 "2024-06-04T21:18:17Z")

</div>

To help volunteers would need to know what device, what firmware and most importantly how configured (at device level and on console registration)…

> [@ricsrdocasro](#):
>
> it always goes to the spreading factor of 10

Does it start at that from 1st message or does it move to that after using an alternate SF to begin with, is that from a fixed location or over all uses (in the field)…details will be informative!