Hw-044 Datasheet Page

The board includes a red "Touch" LED. While useful for debugging, note that the LED is tied to the output pin via a transistor. This means:

Here is a simple sketch to test your HW-044.

Wiring:

The Code (with debounce logic):

const int TOUCH_PIN = 2;
const int LED_PIN = 13;
int lastTouchState = LOW;
int currentTouchState; hw-044 datasheet
void setup() 
pinMode(TOUCH_PIN, INPUT);
pinMode(LED_PIN, OUTPUT);
Serial.begin(9600);
Serial.println("HW-044 Touch Sensor Ready");

void loop() 
currentTouchState = digitalRead(TOUCH_PIN); The board includes a red "Touch" LED
if (currentTouchState == HIGH && lastTouchState == LOW) 
// Touch detected (edge detection)
Serial.println("Touched!");
digitalWrite(LED_PIN, !digitalRead(LED_PIN)); // Toggle onboard LED
delay(50); // Simple debounce

lastTouchState = currentTouchState;

Before we look at the board, let's look at the datasheet for the core IC. The Code (with debounce logic): const int TOUCH_PIN