
U084 · M5Stack

Unit Hall is a Hall sensor. It integrates three A3144E Hall effect switches, with logic processing performed by a 74 series gate integrated circuit. When an S magnetic pole object approaches the front of the hall or an N magnetic pole approaches the back of the hall, it can generate a low-level signal, and the internal LED indicator will light up. Hall sensors are utilized in door magnetic alarms, proximity sensing, speed measurement, and other scenarios. Features Unipolar Hall switch… (M5Stack U084)
| Part number | U084 |
|---|---|
| Manufacturer | M5Stack |
| Category | Sensors › Magnetic & Hall |
| Pins | 4 |
Hall Effect Unit (A3144E Hall Sensor) 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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