HS-S27A 4-Way Tilt Sensor - Direction and Vibration Switch Module for Motion Trigger Projects The HS-S27A 4-Way Tilt Sensor is a digital motion trigger module for detecting orientation changes, shaking, and tilt events. It is useful for anti-tamper switches, game controllers, robot posture detection, and simple motion-activated projects. It can be combined with the ELAB Nano V3, RGB Full Color LED Module, and relay-controlled warning circuits. A four-way tilt element gives more direction-sensitive behavior than a single basic vibration switch. Tilt switches are event sensors, not precision inclinometers. Use an accelerometer module if you need numeric angle measurement. Technical Specifications Parameter Value SKU HS-S27A Product Type 4-way tilt / vibration switch module Output Digital switch states Sensing Method Mechanical tilt contact Typical Supply 3.3V / 5V controller systems Host Requirement GPIO input Use Cases Tilt alarms, toys, anti-tamper, robot posture Software Need Debounce recommended Not For Precise angle measurement Mounting Orientation-sensitive Board Layout & Label Guide Tilt Element - Detects orientation or vibration changes. Signal Pins - Digital outputs to controller GPIO. VCC - Power input if required. GND - Common ground. Board Orientation - Defines which direction triggers. Mounting Holes - Secure in final orientation. Debounce Note - Mechanical tilt events can chatter. Calibration Note - Test trigger directions after mounting. Application Scenarios 1. Arduino Digital Input Read the tilt sensor digital output. const int sensorPin = 2; void setup() { Serial.begin(115200); pinMode(sensorPin, INPUT); } void loop() { Serial.println(digitalRead(sensorPin)); delay(100); } 2. LED Event Output Turn on an LED when the module is tilted. const int sensorPin = 2; const int ledPin = 13; void setup() { pinMode(sensorPin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { digitalWrite(ledPin, digitalRead(sensorPin)); } 3. MicroPython GPIO Monitor Monitor the digital output from a Pico-style board. from machine import Pin import time sensor = Pin(15, Pin.IN) while True: print(sensor.value()) time.sleep(0.1) Packing List 1 x HS-S27A 4-Way Tilt Sensor Module FAQ Q: Does it measure exact angle?A: No, it detects tilt or vibration states. Q: Why does it chatter?A: Mechanical contacts bounce during movement. Q: Can it detect shaking?A: Yes, as a digital vibration event. Q: Can I use it with Arduino?A: Yes, with GPIO inputs. Q: Is orientation important?A: Yes, mount it in the desired reference direction. Q: Can it wake a device?A: Yes, if connected to an interrupt-capable input. Q: What if I need roll/pitch values?A: Use an accelerometer or IMU. Q: Do I need debounce?A: Yes, for reliable events.
