statement; 如果你有一个语句,你可以使用没有大括号{}的if语句。 形式2 if (expression) { Block of statements; } 形式3 if … else语句语法 if (expression) { Block of statements; } else { Block of statements; } 2.5 改变程序流程的if条件式 -比较运算符 比较运算符说明 == 如果两者相等则成立,...
int rightPinState = digitalRead(rightButton); // set value names for read data if (leftPinState == LOW) { // if left button is pressed 。.. digitalWrite(in1pin, HIGH); // make motor go one way digitalWrite(in2pin, LOW); } else if (rightPinState == LOW) { // if right butto...
该电路设计用于监测地下水箱和高架水箱的水位,并在16X2 LCD显示屏上显示水位,并根据我们需要的水位触发继电器并打开或关闭电机。 Arduino uno 板经过编程,可根据传感器接线(两个水箱中均无套管铝线)显示水位,并根据预定的水位控制蜂鸣器和继电器。 模拟引脚A0测量地下水箱的水位,A1、A2、A3、A4引脚测量高架水箱的水位,...
(非) 一、结构 七、指针运算符 1.1 setup() 7.1* 取消 运算符 1.2 loop() 7.2 运算符 二、结构 八、位运算符 2.1 if 8.1 (bitwiseand) 2.2 if...else 8.2 |(bitwi r) 2.3 for 8.3 ^(bitwisexor) 2.4 switchcase 8.4 ~ (bitwise not) 2.5 while 8.5 (bitshift left) 2.6 do...while 8.6 (...
On the Arduino Uno board used for this example, pin 13 has an LED connected to it — therefore you should see a tiny orange LED on your Arduino switch on. Click the upload button in the IDE and wait for it to say ‘Done uploading’ before doing anything else. ...
其他语句和符号 (3)条件语句 if (boolean expression){ statement(s) } else if (boolean expression) { statement(s) } else { statement(s) } 74 3.5 运算符 1. 算术运算符 1. % (余数运算符) 功能:当一个整数除以另一个整数时,余数运算计算余数。“%”(百分号) 符号做余数运算。常用于保持一个...
Arduino Uno R3 DIY Smart Bluetooth Car User Manual Installation Instructions:To get started, we’ll attach the motors and the H bridge (the card that delivers power to the motors) to the lower part of the chassis. First, attach the four metal brackets (they’re rectangular, drilled blocks ...
但有个很麻烦的问题，arduino pro micro板没有支持串口直接烧录代码，不能像arduino uno一样插上电脑写...
In code listing 2-5, there is a missing closing bracket ( } ) following the “current = digitalRead(BUTTON);” line in early prints of the book. This has been fixed in later printings. In code listing 2-6, the “if” statement for Purple should be an “if else” statement.Color...
*Now we needArduino IDE, Click To Download.Open the downloaded code in Arduino IDE, Select the Board Type as Arduino Uno and com port as shown in the below video. *Now you are all set, just click on the upload icon, if you have connected all the connections properly the lights will ...