U128 · M5Stack
Unit CatM is an international version CatM & NB-IoT dual-mode wireless communication module. It uses the SIM7080G module solution, covering most CatM & NB-IoT frequency bands globally, and can adapt to different data communication rate/throughput requirements. The module uses serial communication, AT command control, and supports multiple communication protocols. It integrates an SMA external antenna interface to enhance device communication quality and signal stability. It is very suitable… (M5Stack U128)
| Part number | U128 |
|---|---|
| Manufacturer | M5Stack |
| Category | Communication & Wireless › Cellular (2G / 4G / NB-IoT) |
| Pins | 4 |
SIM7080G CAT-M/NB-IoT Unit 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.
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