If you disconnect the digital i/o pin from everything, its reading may change erratically. This is because the input is "floating" - that is, it doesn't have a solid connection to voltage or ground, and it will
Serial.begin(int num); 打开串口,参数是传输速率,有几个值可供选择,通常使用9600。 Serial.println(format string); 输出信息,表现形式和printf差不多。
// print the results to the serial monitor: Serial.print("sensor = "); Serial.print(sensorValue); Serial.print("\t output = "); Serial.println(outputValue); // wait 2 milliseconds before the next loop // for the analog-to-digital converter to settle // after the last reading: delay...
void loop() { // read the input on analog pin 0: int sensorValue =analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: Serial.println(voltage); } 火...
格瑞图:Arduino-0017-内置示例-模拟输入串口输出 AnalogInOutSerial 1、示例代码及解析 (1)代码 /*Analog InputDemonstrates analog input by reading an analog sensor on analog pin 0 andturning on and off a light emittingdiode(LED) connected to digital pin 13.The amount of time the LED will be on...
Serial.println(F("SSD1306 allocation failed")); for (;;); } display.clearDisplay(); display.setTextSize(1); display.setTextColor(SSD1306_WHITE); display.setCursor(0, 0); display.println(F("Pacman Game")); display.display();
int inputPin = A0; void setup() { // initialize serial communication with computer: Serial.begin(9600); // initialize all the readings to 0: for (int thisReading = 0; thisReading < numReadings; thisReading++) { readings[thisReading] = 0; ...
serial.print ("状态寄存器:"); 对于(int i=0;i "="" ");="" }="" adc_status="0;" |="(response_status[0])<" statusword="writeStatusWord(ADC_status);" statusword:="" -="" begin="); Serial.print(StatusWord.Begin1100,BIN); ...
avrdude.exe: reading input file "My Project.hex" avrdude.exe: input file My Project.hex auto detected as Intel Hex avrdude.exe: writing flash (1906 bytes): Writing | ### | 100% 0.41s avrdude.exe: 1906 bytes of flash written avrdude.exe: verifying flash ...
Arduino Serial Monitor screen Your sketch must call the Serial.begin() function before it can use serial input or output. The function takes a single parameter: the desired communication speed. You must use the same speed for the sending side and the receiving side, or you will see ...