Three-pin analog Hall magnetic sensor module commonly built around a 49E/AH49E linear Hall-effect sensor. The S output is an analog voltage that sits near half the supply voltage with no magnet and moves up or down with magnetic field strength and polarity.
Module supply. Use 3.3 V with ESP32 ADC inputs; many modules also tolerate 5 V when used with 5 V MCUs.
Ground reference shared with the controller.
Analog signal output to an ADC-capable GPIO. Calibrate the no-magnet baseline and threshold during homing.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VCC | power | Module supply. Use 3.3 V with ESP32 ADC inputs; many modules also tolerate 5 V when used with 5 V MCUs. | 3.3V | |
| GND | ground | Ground reference shared with the controller. | ||
| S | analog | Analog signal output to an ADC-capable GPIO. Calibrate the no-magnet baseline and threshold during homing. | 3.3V |
Analog · 3.3V
Verify supply voltage and logic levels before powering up.
Module pins: VCC, GND, S. Schematik maps them to your board in the app.
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