SKU: 26199958786

SparkFun RTK Express Plus Surveying Kit [SL2]

$395.14 $439.04
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

SparkFun RTK Express Plus Surveying Kit [SL2]The RTK Surveyor is a Bluetooth enabled multi band GNSS receiver based on the ESP32 from Espressif and the ZED F9P from u blox. Flip the switch and you'll have 300mm approximate accuracy out of the box and 18mm accuracy with RTCM corrections. This kit provides the L1 L2 antenna, adapters, interface cables, and chargers needed for general GNSS use. We generally recommend using your cellular phone as the radio backhaul for RTCM but you can also use your

The RTK Surveyor is a Bluetooth® enabled multi-band GNSS receiver based on the ESP32 from Espressif and the ZED-F9P from u-blox. Flip the switch and you'll have 300mm approximate accuracy out of the box and 18mm accuracy with RTCM corrections. This kit provides the L1/L2 antenna, adapters, interface cables, and chargers needed for general GNSS use.

We generally recommend using your cellular phone as the radio backhaul for RTCM but you can also use your own, higher power radios as long as they support 57600bps. We also recommend logging all data to your phone over Bluetooth. This is as simple as checking a box within SW Maps. But if you prefer to do long surveys, or need to deal with RAWX measurements where a phone will not be present, a microSD card should be purchased (any size up to 32GB).

Please keep in mind that you will need to provide your own mono-pod or tripod as well as a cell-phone type holder for securing the RTK Surveyor to your mono-pod or tripod.

Note: The L1/L2 antenna has a 5/8" thread which will fit most surveying platforms. The kit includes a 5/8" to 1/4" adapter as well which will fit most camera mono-pods and tripods. You may need additional adapters for your specific equipment.

Sparkfun RTK Comparison

RTK Surveyor

A versatile enclosed device that can be used either for centimeter accuracy positioning or as a base station.

Rover Base IMU Display Receiver Antenna Battery Application
Yes Yes No No u-blox
ZED-F9P 		External 1000mAh Surveying or Base

RTK Express

We've taken everything that is good about the RTK Surveyor and upgraded with a display, a better battery and an accelerometer for digital leveling.

Rover Base IMU Display Receiver Antenna Battery Application
Yes Yes No Yes u-blox
ZED-F9P 		External 1300mAh Surveying or Base

RTK Express Plus

RTK Express Plus adds an internal IMU to combine real-time GNSS tracking with advanced sensor fusion. The result is accurate positioning even when GNSS is lost in tunnels, parking garages, etc.

Rover Base IMU Display Receiver Antenna Battery Application
Yes No Yes Yes u-blox
ZED-F9P 		External 1300mAh Surveying

Features

GNSS Receiver: ZED-F9P

  • Concurrent reception of GPS, GLONASS, Galileo and BeiDou
  • Receives both L1C/A and L2C bands
  • Current: 68mA - 130mA (varies with constellations and tracking state)
  • Time to First Fix: 25s (cold), 2s (hot)
  • Max Navigation Rate:
    • PVT (basic location over UBX binary protocol) - 25Hz
    • RTK - 20Hz
    • Raw - 25Hz
  • Horizontal Position Accuracy:
    • 2.5m without RTK
    • 0.010m with RTK
  • Max Altitude: 50km (31 miles)
  • Max Velocity: 500m/s (1118mph)

Bluetooth® Transceiver: ESP32 WROOM

  • Xtensa® dual-core 32-bit LX6 microprocessor
  • Up to 240MHz clock frequency
  • 16MB of flash storage
  • 520kB internal SRAM
  • Integrated 802.11 BGN WiFi transceiver
  • Integrated dual-mode Bluetooth® (classic and BLE)
  • Hardware accelerated encryption (AES, SHA2, ECC, RSA-4096)
  • 2.5 µA deep sleep current

Overall Device

  • Internal Battery: LiPo 1000mAh with 500mA charging
  • Radio Port: 3.3V TTL Serial (57600bps RTCM TX/RX, configurable)
  • Data Port: 3.3V TTL Serial (460800bps NMEA, configurable)
  • Toggle switch controls
  • Weight: 162g (entire device including battery)
  • Dimensions: 132mm x 101mm x 32mm (5.2in x 3.9in x 1.2in)
  • 1x Qwiic Connector
  • 1x microSD Socket for optional logging

GNSS Multi-Band L1/L2 Surveying Antenna

  • Gain: ≥5dBi
  • LNA Gain: 40dB
  • Reception Frequencies
    • L1: 1555 to 1615MHz
    • L2: 1198 to 1278MHz
  • 50 Ohm Antenna Impedance
  • Overall antenna weight: 335g
  • Bare antenna element weight (including MMCX connector, with RF shield): 160g
  • Dimensions: 148 x 55mm
  • Waterproof IP67
  • Connector: Female TNC

Included

  • SparkFun RTK Surveyor
    RTK Kit Carrying Case
    GNSS L1/L2 Multi-Band Antenna - TOP106
    Antenna Interface Cable - SMA to TNC (300mm)
    1/4" to 5/8" Antenna Thread Adapter
    USB Wall Charger - 5V, 2A (USA PLUG)
    USB A to C Cable - 0.8m
    Data Cable
    Radio Cable
  • RTK Kit Carrying Case
  • GNSS L1/L2 Multi-Band Antenna - TOP106
  • Antenna Interface Cable - SMA to TNC (300mm)
  • 1/4" to 5/8" Antenna Thread Adapter
  • USB Wall Charger - 5V, 2A
  • USB A to C Cable - 0.8m
  • Data Cable
  • Radio Cable

Not Included/Optional:

Resources

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 26199958786

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4.3 ★★★★★
Based on 13 reviews
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Product Reviews
V
Verified Purchase
VanillaPepper
Alexandria, US
★★★★★ 5
Indestructible Toys My Dobermans ❤️
Size: Large, Color: Mesh Green
Actually Respect! goDog Is a Lifesaver The variety of size and colors are phenomenal 😇 I have two Dobermans — serious, determined power chewers — and I’ve spent years trying to find toys that survive even a few days. I’ve tried the big brands (Kong, Goughnuts, Jolly Ball, you name it) — and while some toys last a little while, almost everything eventually ends up shredded, de-squeaked, or in pieces. goDog toys are the ONLY plush toys my Dobermans won’t destroy. We own multiple goDog toys now — dragons, dinosaurs, lizards — mostly in the large size (perfect for Dobermans), but even a few medium-sized ones hold up surprisingly well. Here’s what’s amazing: • They love them — actually carry them around, toss them, chew them gently, and squeak them happily. • They do not rip them apart — no matter how much tugging, chewing, or wrestling happens. • Large sizes are best for Dobermans (and other big breeds) — but even mediums survive for calmer play sessions. • No ripped seams, no stuffing everywhere, and no destroyed squeakers after months of use. What makes goDog toys different? The secret is their Chew Guard Technology — • A reinforced, high-strength inner mesh layer under the soft plush • Double-stitched seams • Durable yet flexible material that somehow resists punctures, tears, and brutal shaking The outside stays soft and fun, but the inside is built like armor. It’s NOT a super hard rubber or rough canvas — it still feels like a cuddle toy, but it’s engineered to survive serious chewing. Materials include: • Durable polyester plush • Chew Guard inner lining (high-tensile mesh fabric) • Reinforced stitching • Non-toxic squeakers • Safe for dogs to play with long-term Real Owner Advice: • Always size up if you have a heavy chewer — large sizes are a must for Dobermans or similarly strong breeds. • Medium sizes are fine if you supervise or your dog is more moderate with toys, but the large toys are built tougher overall. Final Thoughts: If you have big dogs, strong jaws, or just tired of wasting money on destroyed toys — goDog toys are a must. No other plush-style toy even comes close. My Dobermans will destroy almost anything… but they treat their goDog toys like treasured companions. No holes, no rips, just happy dogs. Follow me here on Amazon for more honest, dog-tested reviews! Like this review if it helped — I’ll be uploading even more proven tough toys and pet essentials soon!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2025
B
Verified Purchase
BB
Lexington, US
★★★★★ 4
Surface Fabric is very durable
Size: Small, Color: Hot Pink
Surface Fabric is very durable, but the squeaker didn't last two months. I have urged the manufacturer to find a strong more durable squeaker for their product. My dogs really enoys it when the speaker works. One of his 3 work. I have just bought two more he likes them so much. He takes it to bed every night to catch it once or twice before sleeping. Also loves to catch it a few times during the day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
T
Verified Purchase
Taraknits
Lexington, US
★★★★★ 5
Best. Toy. Ever. For My Superchewer!
Size: Large, Color: Skinny Green, Size: Large, Color: Skinny Green
Best toy ever! My dog destroys toys. Usually within about 15 minutes, she has de-squeakered and defluffed them. By the second day, she has tug-of-war-ed them to shreds. From the time we got this adorable dragon out of the package, she LOVED it. She set to work. It’s been a week, and while she has dewinged him, he lost his squeaker after a few days, and he looks a bit rough, he’s still in one piece! And, we’ve had HOURS of tug-of-war with minimal rips! She’s obsessed 😍 I ordered two more today. We’ve finally found the perfect toy for my baby!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 18, 2026
S
Verified Purchase
SnowshoePete
Houston, US
★★★★★ 5
My 90 lb. Pitbull's All-Time Fave Toy
Size: Large, Color: Coral, Size: Large, Color: Coral
I ordered a plethora of new toys for Bruce to keep him occupied while I am working remotely from home. Poor guy gets so bored while I'm stuck in front of my computer 8+ hours a day. All the other toys are animated, but this one is just a big floppy chewy squeaky toy. Bruce quickly lost interest in all the other chirping, hopping, and twirling toys and fell in love with "Diny". When I opened Diny and gave it to Bruce, he had the elated and surprised look of a 3 yr old at Christmas. And he stayed that happy for hours, and then each time he picked up Diny to play. Diny became his go-to toy over all others (and there are many!). It is well made out of durable fabric, and they did not stuff it full of kapoc (I hate kapoc in dogs toys!). And it is delightfully low-tech. Normally he tears a squeaky toy apart as soon as he can isolate the squeaky mechanism. But cleverly, the squeaky box is loose in the long belly so it moves from one end to the other as the toy is handled. That made it difficult for Bruce to locate it. The toy remained in good condition for 2 weeks of near constant attention by Bruce. But yesterday he zeroed in on the squeaky box and ripped Diny to shreds. I was sad to see Diny go so soon. But boy-howdy was Bruce happy with it. I'm gonna buy another because we liked it so much. And so did I : )
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Reviewed in the United States on May 23, 2024
J
Verified Purchase
Jason W
Fort Morgan, US
★★★★★ 5
This is one “under the radar” gem!!
Size: Large, Color: Coral
This is one “under the radar” gem!! Very strong internal squeaker and way tougher than it looks. My big 125lb Shepard-Husky mix gave it heck, then made it his new buddy. He’ll occasionally give it the business but on the whole, it’s surprisingly tough and my big boy loves it. Nice price!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026

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