# More frequent GPS heartbeat

**URL:** <https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655>\
**Category:** Firmware\
**Created:** [September 11, 2023, 8:57am UTC](https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655 "2023-09-11T08:57:42Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![gauteh](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/gauteh/32/269_2.png) [@gauteh](https://discuss.blues.com/u/gauteh)\
**Post date:** [September 11, 2023, 8:57am UTC](https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655/1 "2023-09-11T08:57:42Z")

</div>

Hi,

We have some notecards with version 3.5.1.15268. They are configured to track position every 2 minutes, and with the lowest heartbeat possible (1 hour). They are located inside a drifting buoy in the ocean, but it seems that the motion is not strong enough on quiet days to trigger the GPS. The buoy then slowly drifts quite far without any position. Is there an issue with this version or is it possible to increase the heartbeat?

Regards, Gaute

---

<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:** [September 11, 2023, 1:23pm UTC](https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655/2 "2023-09-11T13:23:24Z")

</div>

Hi @gauteh,

I’m a bit surprised even gentle movement isn’t triggering the accelerometer on the Notecard. Have you set a different `sensitivity` value in a [card.motion.mode](https://dev.blues.io/api-reference/notecard-api/card-requests/#card-motion-mode) request?

Rob

---

<div class="post-metadata">

**Author:** ![gauteh](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/gauteh/32/269_2.png) [@gauteh](https://discuss.blues.com/u/gauteh)\
**Post date:** [September 11, 2023, 2:12pm UTC](https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655/3 "2023-09-11T14:12:16Z")

</div>

No, haven’t changed it. We initially thought the gps antenna lost signal, but we have it in a good position now that usually works very well. I do sometimes see accelerometer errors in the log, but haven’t been able tl correlate them with the issue. The modem is logging many positions when we are moving it around prior to deployment.

---

<div class="post-metadata">

**Author:** ![robouden](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/robouden/32/336_2.png) [@robouden](https://discuss.blues.com/u/robouden)\
**Post date:** [September 11, 2023, 2:33pm UTC](https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655/4 "2023-09-11T14:33:01Z")

</div>

gauteh,

Can you add other more sensitive motion I2C sensors?

Regards,  
Rob Oudendijk

---

<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:** [September 11, 2023, 4:55pm UTC](https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655/5 "2023-09-11T16:55:27Z")

</div>

@gauteh - for production scenarios like this I would recommend upgrading to the latest LTS version. Also, while it’s not yet documented, if you supply a negative value for `hours`, the Notecard interprets those as `minutes`.

Rob

---

<div class="post-metadata">

**Author:** ![gauteh](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/gauteh/32/269_2.png) [@gauteh](https://discuss.blues.com/u/gauteh)\
**Post date:** [September 11, 2023, 5:38pm UTC](https://discuss.blues.com/t/more-frequent-gps-heartbeat/1655/6 "2023-09-11T17:38:56Z")

</div>

Yes, good point, we will upgrade. Negative value for minutes sounds amazing! We will test that out.