pinMode(groundpin, OUTPUT); pinMode(powerpin, OUTPUT); digitalWrite(groundpin, LOW); digitalWrite(powerpin, HIGH); } void loop() { // print the sensor values: Serial.print(analogRead(xpin)); // print a tab between values: Serial.print("\t"); Serial.print(analogRead(ypin)); // ...
Ultrasonic sensor: generates a pulse to the ECHO pin. The duration of the pulse is equal to the travel time of the ultrasonic wave. 超声波传感器:向 ECHO 引脚产生脉冲。脉冲的持续时间等于超声波的传播时间。 Micro-controller measures the pulse duration in the ECHO pin, and then calculate the di...
int p2){ val = p1+p2; return val; } void printVal(){ Serial.println(val); } void setup() { // put your setup code here, to run once: Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: add_vars()...
by Tom Igoe This example code is in the public domain. */ // these constants won't change: const int ledPin = 13; // led connected to digital pin 13 const int knockSensor = A0; // the piezo is connected to analog pin 0 const int threshold = 100; // threshold value to decide ...
#define TRIGGER_PIN 2 // Arduino pin tied to trigger pin on the ultrasonic sensor. #define ECHO_PIN 3 // Arduino pin tied to echo pin on the ultrasonic sensor. #define MAX_DISTANCE 400 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400...
if ( apds.init() && apds.enableGestureSensor(true)) { Serial.println(“APDS-9960 initialization complete”); } else { Serial.println(“Something went wrong during APDS-9960 init!”); } # initialize other things maybe } - 定义中断函数,这里我们只设置一个flag ...
println("Ultrasonic sensor:"); nh.initNode(); nh.advertise(chatter1); nh.advertise(chatter2); nh.advertise(chatter3); } void loop() { distance1 = sonar1.ping_cm(); str_msg1.data =distance1; chatter1.publish( &str_msg1 ); // 检测脉冲宽度,并计算出距离 distance2 = sonar2.ping_...
一、安装树莓派及arduino开发环境 搭建树莓派串口通信开发环境 （1）安装Python： sudo apt-...
HC-SR04 Ultrasonic Sensor code for Arduino /* Ping))) Sensor This sketch reads a PING))) ultrasonic rangefinder and returns the distance to the closest object in range. To do this, it sends a pulse to the sensor to initiate a reading, then listens for a pulse to return. The length of...
// Read the signal from the sensor: a HIGH pulse whose // duration is the time (in microseconds) from the sending // of the ping to the reception of its echo off of an object.pinMode(echoPin, INPUT); duration = pulseIn(echoPin, HIGH); ...