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Description
Matek GNSS M9N-G4-3100Features GNSS NEO M9N Compas RM3100 Patch Antenna 25*25*4mm MCU STM32G474CE, 170MHz CAN, DRONECAN Protocol Compatible with CAN FD (5Mbps) & CAN 2. 0 (1Mbps) UART3, MSP Protocol 36*36*12mm Firmware: AP_Periph MatekG474 GPS Firmware can be updated via G474 DFU mode M9N G4 3100 is based on ArudPilots AP_Periph firmware, It is a GNSS+COMPASS peripheral with CAN DroneCAN and UART MSP interfaces. M9N G4 3100 uses multi constellation GNSS powered by M9
Features
- GNSS NEO-M9N
- Compas RM3100
- Patch Antenna 25*25*4mm
- MCU STM32G474CE, 170MHz
- CAN, DRONECAN Protocol
- Compatible with CAN FD (5Mbps) & CAN 2.0 (1Mbps)
- UART3, MSP Protocol
- 36*36*12mm
- Firmware: AP_Periph MatekG474-GPS
- Firmware can be updated via G474 DFU mode
- M9N-G4-3100 is based on ArudPilots’ AP_Periph firmware, It is a GNSS+COMPASS peripheral with CAN/DroneCAN and UART/MSP interfaces.
- M9N-G4-3100 uses multi-constellation GNSS powered by M9 series , It is a concurrent GNSS receiver which can receive and track multiple GNSS systems. Owing to the multi-band RF front-end architecture all four major GNSS constellations, GPS,Galileo, GLONASS and BeiDou can be received concurrently.
- M9N-G4-3100 integrates an industrial-grade compass PNI RM3100 which provides high resolution, low power consumption, no hysteresis, large dynamic range, and high sampling rates.
- G474 CAN node is compatible with CAN FD(5 Mbps) & CAN 2.0 (1 Mbps)
Specifications
- GNSS M9N series (GPS, GLONASS, Galileo and BeiDou)
- Magnetic Compass RM3100
- Patch GNSS Antenna 25*25*4mm
- MCU STMG474CE, 170MHz
- UART2, onboard M9N GNSS module
- UART3(TX3), MSP Protocol
- CAN, DroneCAN Protocol
- USB, for firmware update in G474 DFU mode
- CAN bootloader LED, Blue
- Fast blinking, Booting
- Slow blinking, working
- GNSS PPS LED, Green
- Green LED OFF after powering on
- blinking(1Hz) when GNSS has 3D fixed
- 3.3V LED, Red
- Input voltage range: 4~6V (5V pad/pin)
- Power consumption: 100mA
- Operating Temperatures: -20~80 °C
- 36mm*36mm*12mm
- 16g
- M9N-G4-3100_step.zip
Firmware
- ArduPilot AP_Periph: MatekG474-GPS or MatekG474-Periph
- Update via DroneCAN GUI Tool or Mission Planner–DroneCAN Tab, load AP_Periph.bin
- Update in G474 DFU mode via USB & STM32CubeProgrammer, load AP_Periph_with_bl.hex
Tips & Notes
- on M9N-G4-3100, The 3 magnetic coils have little solder paste to avoid the excess to “tilt” them, resulting in some reading inaccuracies of the compass. Any strong impacts will definitely separate them, especially the “tall coil” Sen-Z-f. Pls use this precision module with care.
- Start with ubx GNSS FW3.01, timepulse is aligned with UTC time and that time is set valid only after leap second is downloaded. That could take up to 12.5 min. Probably PPS LED will not blink immediately after GPS has 3D fixed.
- The M9N-G4-3100 provides the ability to reset the receiver. Bridging “M9N-RST” pad to Ground for at least 100 ms will trigger a cold start. RESET will delete all information and trigger a cold start. It should only be used as a recovery option.
- No barometer integrated.
Includes
- 1x M9N-G4-3100
- 1x JST-GH-4P to JST-GH-4P 20cm silicon wire
- Mounting base (1x PCB plate, 4x silicon grommets, 4x Nylon standoffs M3x7, 4x Nylon screws M3*8)
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.3 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 4
Decent, definitely got the job done
Size: X-Large, Color: Light Grey Heather, Size: X-Large, Color: Light Grey Heather
The came out to be a pretty decent quality for the price. Was going to a polo match and just needed something to creat on for my date
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Reviewed in the United States on April 1, 2026
★★★★★ 5
An Extinct Breed - Get before they are gone
Size: Medium, Color: Red
In my day polos used to be soft thick 100 % cotton with generous sleeves covering the upper arm till above the elbows and collars standing high and grand and covering the back of the neck till below the hairline. They had substantial structure/body (shape that held) and ultra comfortable soft cotton. This was my go to piece of clothing to step out in (as opposed to round neck collarless T-Shirts that I wore only at home or for sporting activities).
However, this simple good thing was not to be taken for granted. As time went by, I watched in horror this simple evergreen staple slowly vanish - being replaced by plastic, toxic, carcinogenic trash (synthetic, polyester, 'performance', 'hi-tech') being passed as clothing riding solely on deceptive/misleading/convincing marketing and rapidly transient 'fast fashion trends'. These pieces of junk being passed as 'performance polos'/'hi-tech' had no 'body', clung to your skin like plastic, caused my sensitive skin to itch, with arms so short as if there was shortage of clothing material in the world and were of such thin cheap uncomfortable material that I would wonder how in the world do people put these on their bodies.
The 'trend' continued ...
Fast forward to the present day, finding the 'cotton polo of my youth' is like finding a dinosaur. The polo I grew up with is practically extinct - replaced by trash made with ever cheaper feeling and more toxic materials. Its a win win for the corporates/brands - cheap synthetic lab created materials astronomically marked up (riding on advertisement) - filling the corporate pockets unlike never before and successfully 're-programming' the minds and purchasing behavior of the new generation to accept, get used to, and even get addicted to such toxic 'hi-tech' trash. As for the manufacturing ? No problem - hire some MBA's (with zero knowledge/passion for good quality textile/garment manufacturing) - their sole purpose to be 'maximizing profits' for the next 'earnings report' and they would find the 'cheapest' offshore factory to outsource the manufacturing to. This being a continuous process - if you get a cheaper bid from another factory, just switch to it. No wonder you can never get consistent material, sizing, quality for the exact same product purchased even months apart.
Not just that - even brands that sold fantastic quality 100 % cotton polos at a very reasonable price like Tommy Hilfiger etc went STEEP DOWNHILL. A Tommy Hilfiger polo being sold today is NOWHERE NEAR anything like the quality they had even a few years ago (even though still being theoritically 100 % cotton, the quality (material, cut) now is absolutely junk - in fact they went from being my favorite Polo Shirts (thick, soft, cloud like cotton with generous neck and sleeves and amazing body, texture and shape and in high quality colors and finish) to absolutely shockingly unwearable pieces of garbage (thin, rough, itchy cotton with skimpy sleeves and flat collars and dull cheap finsih and colors with NO lusture, body whatsoever).
I always wish I had seen this day come. I would have stocked up on a lifetim's supply of 'real' clothing when they were still available.
Given the above, I am extremely surprised (pleasantly) by this Amazon Essentials Cotton Polo. This is 100 % cotton, has generous non-skimpy sleeves and has decent material and shape reminiscent of the 100 % cotton polo I am habituated to from my time. Quality of material wise - it is about 65% - 70% of the cotton polos of yesteryears - BUT - even THAT - is like finding diamond (or a dinosaur) in these abhorrent-clothing-times for the 100 % cotton polo lover.
Get this before the 'real cotton polo' is gone for good. I think I may be getting a few.
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Reviewed in the United States on August 10, 2022
★★★★★ 5
Love these polos
Size: Large, Color: Olive
Nice material, fits true to size, colors are nice. Great work shirt in an office setting.
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Reviewed in the United States on June 4, 2026
★★★★★ 3
Sometimes Good, Sometimes Not So Good...
Size: X-Large, Color: Aqua
I've bought several of these shirts in the past, and I've always been very happy with them, right up until my latest purchase. Apparently, depending on which color/style you choose, the shirts may be manufactured in a completely different country. And despite Amazon's efforts to make sure their clothing brands have consistent sizing across the board, it's now clear to me that some of those countries are not on the same page. Case in point: Guatemala.
My latest Amazon Essentials polo shirt purchases consisted of the colors 'light yellow' and 'rust'. Now, the light yellow shirt seems fine. Maybe a tiny bit smaller than my previous shirt purchases, but nothing major. (I think it says made in Chihuahua - but it's hard to tell.) However, the rust colored shirt is drastically smaller than all my similar-sized Amazon polo shirts. I bought it in size Large, but the shirt tail alone is nearly four inches shorter than my previously purchased Amazon Essentials polo shirts. And while the Large-sized Amazon polo shirts normally fit me quite comfortably, with a little bit of room to spare, this rust-colored shirt is skin-tight. If I didn't know any better, I'd swear it was a size Medium masquerading as Large.
All of my previous shirt purchases (I now realize) are labeled as being made in either Madagascar or Vietnam. Those are great. They fit wonderfully. But this new rust-colored shirt (once again, same brand - Amazon Essentials) is labeled as made in Guatemala. And let me tell you, the factory in Guatemala is not on the same page as the factory in Madagascar. Not even close.
So yeah, these are great shirts. So long as you happen to buy the colors/styles that are being made in Madagascar or Vietnam. But buyer beware if you happen to get one from the factory in Guatemala, because those guys are using a whole different set of rulers over there. And unfortunately, there's no way to tell until it arrives on your doorstep.
I'm normally a big fan of Amazon brand products. But this experience has made me quite a bit more wary about buying their clothing items in the future. It really is so very important that their brands have consistent sizing across all colors and styles.
P.S. I actually bought the rust-colored shirt TWICE, because I at first assumed I must have gotten a mislabeled product. But, nope. Both rust-colored shirts are the same, drastically-smaller size, and both are labeled made in Guatemala.
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Reviewed in the United States on June 9, 2020
★★★★★ 5
Great
Size: Large, Color: Burgundy
Nice quality, great fit. Love the pique knit.
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Reviewed in the United States on May 26, 2026