int buttonUpState = digitalRead(pullUp); int buttonDownState = digitalRead(pullDown); // make a message that will be sent to the serial line String message = “Pull Up: ” + String(buttonUpState); message = message + “。 Pull Down: ” + String(buttonDownState); // send the message...
digital input on pin 2 and prints the results to the serial monitor. The circuit: * Momentary switch attached from pin 2 to ground * Built-in LED on pin 13 Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal 20K-ohm resistor is pulled to 5V. This configuration...
Step 5: Using the Pull - Down Resistor /*simular and the pull - down resistor */ int button = 2; int led = 10; int buttonState = 0; void setup() { pinMode(led,OUTPUT); pinMode(button,INPUT); Serial.begin(9600); } void loop() { buttonState = digitalRead(button); if (button...
OUTPUT); // sets the digital pin as output pinMode(KEY1, INPUT_PULLUP); pinMode(KEY2, INPUT_PULLUP); myGizwits.begin(); } void wifiStatusHandle() { // if(myGizwits.wifiHasBeenSet(WIFI_SOFTAP)) // Serialprintln(F("WIFI_SOFTAP!")); // // if(myGizwits.wifiHasBeenSet(WIFI_AIRL...
引脚模式选择,模式有INPUT(输入), OUTPUT(输出), INPUT_PULLUP(上拉输入,自动拉高电平) //GPIO FUNCTIONS #defineINPUT0x00 //输入 #defineINPUT_PULLUP0x02 //上拉输入 #defineINPUT_PULLDOWN_160x04// PULLDOWN only possible for pin16下拉输入仅适用于PIN16脚 ...
pinMode(ledPin, OUTPUT); 在setup函数中,我们有一个单独的命令。pinMode函数告诉编译器如何使用一个管脚。在这种情况下,我们声明ledPin(值为 13)为输出引脚。这告诉编译器我们正在发送信号,并且我们不期望通过这个管脚接收信号。然后,在开始我们的loop函数之前,我们用右括号关闭setup函数。
pinMode(15, OUTPUT); //HSPI SS } // the loop function runs over and over again until power down or reset void loop() { //use the SPI buses vspiCommand(); hspiCommand(); delay(100); } void vspiCommand() { // 模拟数据 ...
// Set all output pins LOW PORTB = 0b00000000 ; // Motor Spin-down grace period delay( 300 ) ; } void bridgeForward( void ) { bridgeOFF() ; // Forward, D8+D9+D13 HIGH, D13 is the onboardLED. PORTB = 0b00100011 ;
The output ranges from 4.2V when completely charged to 3.7V. This battery has a capacity of 400mAh for a total of about 1.9 Wh. If you need a larger (or smaller!) battery, we have a full range of LiPoly batteries. The batteries come pre-attached with a genuine 2-pin 25mm... ...
your sketch code; please wrap it into a code block, seeGithub markdown manual when encountering an issue that happens at run time, attach the serial output. Wrap it into a code block, just like the code. for issues that happen at compile time, enable verbose compiler output in the IDE ...