Arduino Serial.read()函数用于从串口接收数据。它只读取第二个输入是因为Serial.read()函数默认只读取一个字节的数据。如果需要读取更多字节的数据,可以使用Serial.readBytes()函数或者循环调用Serial.read()函数。 Serial.read()函数返回一个整数值,表示读取到的字节数据。如果没有可
Serial.println("lease type in the ID # (from 1 to 127) you want to delete..."); uint8_t id = readnumber(); if (id == 0) {// ID #0 not allowed, try again! return; } Serial.print("Deleting ID #"); Serial.println(id); deleteFingerprint(id); } uint8_t deleteFingerprint(...
int numbers[5]; int moreNumbers[5] = {1,2,3,4,5}; void setup() { // put your setup code here, to run once: Serial.begin(9600); } void loop() { // put your main code here, to run repeatedly: for(int i = 0; i < 5; i++){ Serial.println(numbers[i]); } for(int ...
所以,当调用Serial.flush()时功能是等待发送完成并且清除接收缓冲数据;当调用Serial.flush(true)时只等待发送完成。 Serial.readBytes() esp32 arduino的readBytes()是继承自Stream类,默认是1秒超时的,如果1秒钟没读到所需的数据则返回已经读取的数据。 DescriptionSerial.readBytes() reads characters from the seria...
num = Serial.parseInt(); } return num; } void loop() // 循环执行 { Serial.println("Ready to enroll a fingerprint!"); Serial.println("lease type in the ID # (from 1 to 127) you want to save this finger as..."); id = readnumber(); ...
Serial.begin (9600); } void loop() { double distance; //正转 if (count == 2500) { // Serial.println("ok");//调试用 num = num + 1; time_cw = millis(); t = time_cw - time3; t = t / 1000; distance = num * d * pi; velocity = d * pi / t; Serial.print("The ...
int nNumber; if(Serial.available() > 0) { nNumber = Serial.parseInt(); Serial.println(nNumber); } delay(100); nCount ++; if(nCount & 0x1) { ON(LED); } else OFF(LED); Serial2.write('U'); Serial3.write('V'); }
uint8_t readnumber(void) { uint8_t num = 0; while (num == 0) { while (! Serial.available()); num = Serial.parseInt(); } return num; } void loop() // 循环执行 { Serial.println("Ready to enroll a fingerprint!"); Serial.println("lease type in the ID # (from 1 to 127)...
问使用Arduino串行监视器和嵌套循环与不同的外围设备通信EN一、安装树莓派及arduino开发环境 搭建树莓...
Serial.begin(9600); SPI.begin(); rfid.init(); } void loop() { //找卡 rfid.findCard(PICC_REQIDL, str); //防冲突检测,读取卡序列号 if (rfid.anticoll(str) == MI_OK){ Serial.print("The card's number is : "); //显示卡序列号 ...