We bought two of this and one is not working. It cannot connect device to USB port. We have emailed the support team and still waiting for your response. We also want to order two more of the same but prefer to wait for your positive response.

I used the pair of these boards (F9P, SMA) to set up a base station and provide my rover with precise positioning information. The base station has dish antenna, long cable, a HolyBro telemetry radio and an ESP32 NTRIP server. The rover has matching telemetry radio, smaller antenna, and GPS is connected to onboard Raspberry Pi 3 via USB cable. Big kudos for SparkFun for providing example NTRIP server for ESP32 GNSS Library. It is a good starting point, although it must be modified to handle connectivity interrupts etc. I learned a lot from SparkFun documentation and deepsouthrobotics.com videos. Overall, I am very happy with these boards - they are well made, easy to setup and are worth every penny. For the rover the F9R variety seems to be a better fit, which should probably be mentioned in the web pages. My project album is here: https://photos.app.goo.gl/jwYZRtTi1LVshQoW8

SMA connector is very sturdy; thank you SFE engineers for releasing this version of the board. Works great, TTFF 30-45 seconds, tracking 27 satellites indoors with 100-150 PDOP. Updates at 10 Hz easily, very high quality module.

Really nice breakout board for industry-leading receiver. Tested it in RTK mode via u-center, works good, centimeter-level precision is evident.

P. S. Do not forget that you want multi-band GNSS antenna, like u-blox https://www.sparkfun.com/products/15192 for $65. The cheapest antenna for $10 can work but will limit the receiver potential.

It was really easy to configure an start receiven RTCM messages at my USB port. I recommend it!

I wanted to know if I can connect a gnss antenna from leica with the following features on the ZED-F9P (Qwiic) using a tnc to sma adapter.

The board worked as advertised. It took a little bit of time to work through the command structure and get the device into the right state, but once it was there, it was able to lock on a global position with ~1m accuracy within about 60 seconds and provide 1cm relative location accuracy for a second board. I opted not to use the Arduino libraries as I want to control the board directly for my application (using STM32 boards). Documentation for direct access and control is a little sparse.

I purchased this receiver to implement some precision farming software I wrote for a Raspberry Pi. I am pulling RTK correction data off of my state's DOT-ran correction network through my cell phone hotspot, and it works fantastic. I usually get a RTK fix in 5 minutes or less, and RTK float almost immediately on power-up. I haven't quantified the accuracy of this product, but anecdotally, it seems to be pretty spot-on. The Sparkfun tutorial on this product is really good to get going, but be prepared to spend some time tinkering in U-center to get everything set like you want. I purchased a cheapie antenna instead of the u-blox antenna, with the idea that if it wasn't reliable with the cheap antenna, I would splurge on the u-blox antenna. However, I have not had any issues with my cheap antenna, so I would recommend starting with a cheap antenna and only upgrading if you are having issues. Get the SMA version! I end up connecting and disconnecting the antenna a lot to move my device in and out of the tractor, and it is nice to not worry as much about damaging the connector.

Got this and ESP32. Already have RTK Express. Rereading How to Build a DIY GNSS Reference Station again. Looks doable. Already marked my orchard with RTK Express and plotted the points on Google Earth and wrote a little code around it. Now want to take it to the next level. Also saw some useful things in the comments.

Arrived quickly and working well. Looks like it will be a good base station.

I am sure it will be great but I never recieved this product.

Worse FedEx thinks they delivered.

This is a great tool and it works really well!

Thanks for packaging and fast delivery.

Unit works well. Take care with programming and the RTK feature. Could be a little better information however it works great once you get it all dialed in.

Easy to use and program. Works great with the right add ons.

the accuracy of this little board is amazing.

The product looks nice and works as my expectation. Thanks Sparkfun!

This is a follow up review to the first written around half a year ago (mid 2020) which has proven to worthwhile despite the numerous challenges encountered during the beginning. First, be aware that a technical deep dive is a requisite to unlock the full potential of the GPS; till now I don't understand all the aspects and acronyms fully after extensive experimentation and reading up, but eventually you can piece together enough information to make it work. Best part about the breakout is the number of interfaces. Using the breakout for both a caster and rover configuration, each serving their roles as desired, whether it's I2C or USB type C. The tutorials provide a good head start to get you on your feet, be sure to follow every single detail to the have a working configuration as well as a quality antenna with a clear view of the sky

I've gone to the extent of writing up my detailed experience of the hardware in the form of a HardwareX article (https://doi.org/10.1016/j.ohx.2021.e00203) which is freely available to anyone to read (open access) which I hope will assist others with using the hardware for innovative projects. Some quantitative evaluation of the accuracy is also included. This forms a significant portion in the successful execution of my PhD research project which I hope to finish this year (2021) - thanks SparkFun for continuing to provide an extensive range of fantastic products!