M5Stack Limit Switch Unit

The Unit Limit from M5Stack is a limit switch sensor. When the switch bar is pressed, the digital single of the Unit would change from 3.3V to 0V, which may generate a limit signal to MCU or other peripherals. Applied for multiple mechanical equipment to achieve limit protection. Features

* Contact limit switch

* Long durability, up to 400K times lifetime

* Multiple installation methods

Package Contents

* 1x Unit limit

* 1x HY2.0 4-pin Cable (20cm)

Specifications

Switch Bar Length 16mm

Mechanical Lifetime 400K Times

Power Supply DC 5V

Output Logical Signal DC 3.3V

Standby Current DC5V@2mA

Operation Current DC5V@3mA

Net Weight 6.3g

Gross Weight 11.4g

Product Size 37 * 24 * 9.5mm

Package Size 92 * 135mm

Resources

* Product Documentation

* Schematic

* Arduino Example

Pinout

M5CORE - PORT B G36

UNIT Limit Input

Arduino Example #include

#define KEYPIN 36

void setup() {

M5.begin();

M5.Lcd.setTextSize(4);

M5.Lcd.print(("\n UNIT-LIMIT\n Example"));

pinMode(KEYPIN, INPUTPULLUP); }

void loop() {

if (!digitalRead(KEYPIN)) {

M5.Lcd.setCursor(0, 130);

M5.Lcd.print((" Hit limit!"));

} else {

M5.Lcd.setCursor(0, 130);

M5.Lcd.println((" "));

}

delay(100); }