Serial.print(data): 这个函数用来向串口发送数据,可以是任意类型的值,例如数字、字符串、字符等。数据会被转换为ASCII码发送,不会换行。例如Serial.print("Hello")表示发送字符串"Hello"。Serial.println(data): 这个函数和Serial.print(data)类似,但是会在数据后面加上回车和换行符,方便阅读。例如Serial.println(...
Serial.print(analogRead(redPin)); Serial.print(","); Serial.print(analogRead(greenPin)); Serial.print(","); Serial.println(analogRead(bluePin)); } /* Processing code for this example // This example code is in the public domain. import processing.serial.*; float redValue = 0; // re...
我们先用示例代码Blink为例: /* ESP8266 Blink by Simon Peter Blink the blue LED on the ESP-01 module This example code is in the public domain The blue LED on the ESP-01 module is connected to GPIO1 (which is also the TXD pin; so we cannot use Serial.print() at the same time) ...
Table 4-2 shows what you will see when you print variables using Arduino routines. Table 4-2. Output formats using Serial.print Data type Print (val) Print (val,DEC) Print (val,BYTE) Print (val,HEX) Print (val,OCT) Print (val,BIN) char A 65 A 41 101 1000001 int 65 65 A 41 ...
登录后复制// Define the Trig and Echo pin connectionsconstinttrigPin =9;constintechoPin =10;// Define variables to store duration and distancelongduration;intdistance;voidsetup(){// Start the serial communicationSerial.begin(9600);// Define the Trig and Echo pins as Output and InputpinMode(...
lcd.print(yValue); lcd.setCursor(12,1); lcd.print(zValue); delay(100) 然后Arduino将这些校准(减去)值与预定义的限制进行比较。并采取相应的行动。如果值高于预定义的值,则它将发出蜂鸣器哔哔声并使用处理在计算机上绘制振动图。 /* comparing change with predefined limits*/if(xValue < minVal || xVa...
fix(HardwareSerial): fix pin remapping in begin() on master by @pillo79 in #10379 I2S fix(i2s): Use separate variables when reading and writing by @me-no-dev in #10509 LEDC fix(example): print correct fade direction by @P-R-O-C-H-Y in #10450 PSRAM fix(psram): Init PSRAM be...
Release script: protect bash variables and add logs, major/minor/rev macro addition, BASH fix (#8074) (#8126) (#8127) (#8168) Remove some no longer applicable artifacts from .gitignore (#8170) Release 3.0.0 Notes Great additions PoC cache configuration control (aka +16KB heap!) (#7060...
Once the JSON string is deserialized, we have declared three variables to hold three parameters that are sent by the server, which is theLED_STATUSthe Temperature and Humidity data from the DHT22 sensor. Once we do that, we set up the display and print all the information to the OLE...
1. Use stack variables: use stack variables instead of global variables as much as possible. The stack variable will be released after the function is completed, and the global variable will always occupy RAM.2. 避免内存泄漏：确保动态分配的内存（使用`malloc`或`new`）在使用完毕后释放（使用`...