TFMini LASER Intrusion alarm

[Idahowalker]

Here is the code I use to test a TFMini:

#include <HardwareSerial.h>
HardwareSerial SerialTFMini( 2 );
// serial(1) = pin27=RX, pin26=TX
// serial(2) = pin16=RX green, pin17=TX white




void getTFminiData(int* distance, int* strength) {
  static char i = 0;
  char j = 0;
  int checksum = 0; 
  static int rx[9];
  if(SerialTFMini.available())
  {  
    // Serial.println( "tfmini serial available" );
    rx[i] = SerialTFMini.read();
    if(rx[0] != 0x59) {
      i = 0;
    } else if(i == 1 && rx[1] != 0x59) {
      i = 0;
    } else if(i == 8) {
      for(j = 0; j < 8; j++) {
        checksum += rx[j];
      }
      if(rx[8] == (checksum % 256)) {
        *distance = rx[2] + rx[3] * 256;
        *strength = rx[4] + rx[5] * 256;
      }
      i = 0;
    } else 
    {
      i++;
    } 
  }  
}


void setup() {
  Serial.begin(115200);
  
SerialTFMini.begin( 115200 );

}

void loop() 
{
  int distance = 0;
  int strength = 0;
  getTFminiData(&distance, &strength);
  while(!distance) {
    getTFminiData(&distance, &strength);
    if(distance) {
      Serial.print(distance);
      Serial.print("cm\t");
      Serial.print("strength: ");
      Serial.println(strength);
    }
  }

delay(100);
}

You'll have to change the serial thingies to match your microController.