PIR Motion Human Sensor AM312

Description:

the AM312 PIR Motion Sensor is a cutting-edge and compact passive infrared (PIR) motion sensor specifically designed to enhance security and efficiency in a wide array of applications, including burglar alarms and automated lighting systems. Harnessing the power of advanced technology, this remarkable sensor boasts an exceptional capability to effortlessly interface with microcontrollers such as the ESP8266 or ESP32, accepting a direct supply of 3.3 volts. Embodying precision and reliability, the AM312 PIR Motion Sensor stands as a beacon of innovation, empowering your projects with heightened responsiveness and accuracy to detect even the subtlest movements in their surroundings. Unleash the potential of your security setups and automation endeavors with this state-of-the-art sensor, making safety and convenience an ever-accessible reality.

Features:

• Immunity enhancement, internal use of digital signal processing, direct high-low output.
• Repeatable trigger: the sensor output high after, the delay period, if there is human activity in its sensing range, the output will remain high until the people left after the delay, it becomes low (ie: sensor module detects the human body every activity will be automatically extended a period of time delay, and to the last activity time as the starting point of the delay time).

Technical Parameters:

• Working voltage: DC 2.7-12V
• Static power consumption: <0.1mA
• Delay time: 2 seconds
• The blocking time: 2 seconds
• Trigger: can be repeated
• Sensing range: ≤100 degree cone angle, 3-5 m; (required depending on the lens)
• Working temperature: -20 - + 60 ℃
• PCB Dimensions: 10mm x 8mm
• Total size: Approx. 12mm x 25 mm
• Module Lens: Small lens

Pinout of the Module:

Circuit:

Code:

int led = 13;                // the pin that the LED is atteched to
int sensor = 2;              // the pin that the sensor is atteched to
int state = LOW;             // by default, no motion detected
int val = 0;                 // variable to store the sensor status (value)

void setup() {
  pinMode(led, OUTPUT);      // initalize LED as an output
  pinMode(sensor, INPUT);    // initialize sensor as an input
  Serial.begin(9600);        // initialize serial
}

void loop(){
  val = digitalRead(sensor);   // read sensor value
  if (val == HIGH) {           // check if the sensor is HIGH
    digitalWrite(led, HIGH);   // turn LED ON
    delay(500);                // delay 100 milliseconds 
    
    if (state == LOW) {
      Serial.println("Motion detected!"); 
      state = HIGH;       // update variable state to HIGH
    }
  } 
  else {
      digitalWrite(led, LOW); // turn LED OFF
      delay(500);             // delay 200 milliseconds 
      
      if (state == HIGH){
        Serial.println("Motion stopped!");
        state = LOW;       // update variable state to LOW
    }
  }
}

Documents:

• Tutorial
•  Pir-Am312