
U190 · M5Stack

Unit GPS SMA is a GNSS global positioning and navigation unit that integrates the high-performance ATGM336H navigation module from CASIC, using the AT6668 chipset, paired with an active external antenna to provide more accurate and reliable satellite positioning services. Compared to previous products, the AT6668 supports multi-frequency and multi-mode GNSS signal reception, capable of receiving signals from multiple satellite navigation systems (including GPS, BD2, BD3, GLONASS, GALILEO,… (M5Stack U190)
| Part number | U190 |
|---|---|
| Manufacturer | M5Stack |
| Category | Communication & Wireless › GNSS / GPS |
| Pins | 4 |
GPS/BDS Unit with SMA Antenna (AT6668) pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | SIG1 | bidirectional | PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map |
| 2 | SIG2 | bidirectional | PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map |
| 3 | 5V | power | |
| 4 | GND | ground |
Schematic symbol and footprint
Schematic symbol
Footprint: Grove HY2.0 4-pin through-hole, 2.0 mm pitch — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
Related parts

Adafruit Mini GPS PA1010D - UART and I2C - STEMMA QTADA4415

Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updatesADA746

Adafruit Ultimate GPS FeatherWingADA3133

Adafruit Ultimate GPS GNSS with USB - 99 channel w/10 Hz updatesADA4279

Adafruit Ultimate GPS HAT for Raspberry Pi A+/B+/Pi 2/3/4/Pi 5ADA2324

SparkFun GNSS Breakout - Chip Antenna, SAM-M8Q (Qwiic)GPS-15210

SparkFun GNSS Correction Data Receiver - NEO-D9S (Qwiic)GPS-19390

SparkFun GNSS Receiver Breakout - MAX-M10S (Qwiic)GPS-18037