TL;DR: need to sync positions of my fleet every 1 or 2 seconds. So I’ve been back and forth in the docs and attempts to make the GPS work the way I wanted/expected. I want to confirm this here if possible. My use case is to read a position every 1 or 2 seconds, so the Notecard GPS would need to be…

Hi @hcabral and welcome to the Blues community! When you consider using Notecard for both cellular and GPS service, it’s important to remember that they cannot both be enabled simultaneously. It’s also important to note that the GPS location will not update if the Notecard doesn’t sense any motion …

Hi @RobLauer , thanks for your response. Yes, what you says matches with what I slowly found out, I just wish that this information was slightly more obvious or upfront in the documentation. The accelerometer functionality is nice for asset tracking, indeed, but my use case is more sailing/regatta r…

Hi @hcabral , We’re always looking to improve our documentation, so we’ll take a close look at how we relay this info going forward! If you’re syncing with the cloud every 5-10 seconds, you’ll definitely want to utilize an external GPS (and keep your Notecards in continuous mode to maintain their c…

Thanks @RobLauer ! I’m prototyping with a Pi 2 W. Just trying to figure out my connections, shouldn’t I be able to connect the Notecarrier X to my Pi using Qwiic/I2C? Thus I could follow the blog post idea where the AdaFruit GPS is connected to the Notecarrier via serial aux, and the Pi would simply…

Hi @hcabral , Due to numerous clock-stretching issues on the Pi, I’d recommend connecting the Pi 2 W to your Notecarrier X over serial TX/RX instead of I2C. You can still connect to the Adafruit GPS receiver over AUXTX/AUXRX then too. Rob

Hi Rob, Got it, it makes sense. I will try the RX/TX simple serial comm with the Pi. So if the GPS will use AUXRX/AUXTX, setting up the RX/TX between the Notecarrier and the Pi 2 W, I would need to setup the card comm interface via which API? card.io, card.aux? Thansk! Henrique

Hi @hcabral , No Notecard APIs required to use a serial interface, it’s all in firmware. Here is an example using the note-python SDK: note-python/examples/notecard-basics/serial_example.py at main · blues/note-python · GitHub Thanks, Rob

High Frequency GPS updates

hcabral November 11, 2025, 4:59pm 10

Sounds good! Thanks, will proceed with some more tests. =)

1 Like

External GPS on cold boot

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High Frequency GPS updates

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