# AUX Pin as GPS 1PPS

**URL:** <https://discuss.blues.com/t/aux-pin-as-gps-1pps/2906>\
**Category:** Hardware\
**Created:** [March 10, 2025, 3:46pm UTC](https://discuss.blues.com/t/aux-pin-as-gps-1pps/2906 "2025-03-10T15:46:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![spring](https://avatars.discourse-cdn.com/v4/letter/s/ee59a6/32.png) [@spring](https://discuss.blues.com/u/spring)\
**Post date:** [March 10, 2025, 3:46pm UTC](https://discuss.blues.com/t/aux-pin-as-gps-1pps/2906/1 "2025-03-10T15:46:22Z")

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I have no idea if this is possible but I have a requirement to sync my host MCU timer to GPS time. If I was using an external GPS I would get the rough time via the serial port, then accurately sync with the one pulse per second (1PPS) signal which is present on many GPS modules. I can use the notecard timestamp (network time instead of GPS time, but that is fine).

So my question would be, does the GPS module in the notecard have a 1PPS signal? And is it possible to route this to one of the AUX pins in a future release?

I only need to do this occasionally and I’m trying not to add the cost of another module, when GPS is already built in to the notecard.

Thanks

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**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 11, 2025, 3:46pm UTC](https://discuss.blues.com/t/aux-pin-as-gps-1pps/2906/2 "2025-03-11T15:46:14Z")

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Hi @spring,

Notecard doesn’t expose a 1PPS signal from its GPS module. However, as mentioned, you can retrieve network-synced timestamps using the `card.time` request.

If this type of precision is essential for your application, you’ll likely need an external GPS module with a dedicated 1PPS output!

Thanks,  
Rob

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**Author:** ![spring](https://avatars.discourse-cdn.com/v4/letter/s/ee59a6/32.png) [@spring](https://discuss.blues.com/u/spring)\
**Post date:** [March 11, 2025, 4:15pm UTC](https://discuss.blues.com/t/aux-pin-as-gps-1pps/2906/3 "2025-03-11T16:15:46Z")

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Thanks for the reply. I guessed as much, but thought it was worth asking.