#include "KC868.h" KC868 kc868(&Serial2); //create kc868 object void setup() { Serial.begin(115200); delay(2000); kc868.begin(115200);//begin kc868 with baud 115200 uint8_t ret = kc868.readSensorAll(); //read all sensor state, Serial.printf("sensor state is 0x%02x.\n",ret); //8 bit value,the 6st bit is the state of sensor 6, and the lowest bit is the state of sensor 1 //Which bit is 1, which bit is triggered. } void loop(){ kc868.poll(); }