# Card aux gpio mode on Lora?

**URL:** <https://discuss.blues.com/t/card-aux-gpio-mode-on-lora/2922>\
**Category:** Notecard API\
**Created:** [March 17, 2025, 3:37pm UTC](https://discuss.blues.com/t/card-aux-gpio-mode-on-lora/2922 "2025-03-17T15:37:13Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![stewartm](https://avatars.discourse-cdn.com/v4/letter/s/a9adbd/32.png) [@stewartm](https://discuss.blues.com/u/stewartm)\
**Post date:** [March 17, 2025, 3:37pm UTC](https://discuss.blues.com/t/card-aux-gpio-mode-on-lora/2922/1 "2025-03-17T15:37:13Z")

</div>

Ive been using the card.aux gpio mode on celluar, wifi and ntn with success for about 6 months, however when I try to use it on a lora card i get a error message asking about a unique port but i have set the port in the config string  
{“req”:“card.aux”,“mode”:“gpio”,“usage”:[“input-pullup”, “input-pullup”,“input-pullup”,“input-pullup”],“file”:“switch.qo”,“sync”:true,“format”:“compact”,“port”:1}

Does the lora noteacard support this feature ?

Stew

---

<div class="post-metadata">

**Author:** ![RobLauer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/roblauer/32/1567_2.png) [@RobLauer](https://discuss.blues.com/u/RobLauer)\
**Post date:** [March 18, 2025, 4:31pm UTC](https://discuss.blues.com/t/card-aux-gpio-mode-on-lora/2922/2 "2025-03-18T16:31:45Z")

</div>

Hi @stewartm,

The devil is in the details here. While the `card.aux` API is [mostly supported](https://dev.blues.io/api-reference/notecard-api/card-requests/latest/#card-aux) by Notecard LoRa, if you dig in a little you’ll see the `sync` argument (which is what allows a Notecard to autonomously report any state changes as new Notes) is not supported. This is because of the low bandwidth nature of Notecard LoRa and the fact that all Notefiles have to be templated…which I don’t believe is even possible with Notes generated in this mode, since the structure can vary e.g.:

```auto
{"state":[{"low":true},{},{},{}]}

```

vs

```auto
{"state":[{"high":true},{},{},{}]}

```