Python SCmd.readSerial（）和Serial.read（）之间的差异

目前，我正试图通过串行端口将信息从python发送到Arduino

我只使用一个字母

Serial.read（）

'p'来管理它，并使用以下代码对我的Arduino执行操作

Arduino代码：

#define arduinoLED 12   // Arduino LED on board

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(arduinoLED, OUTPUT);     // Configure the onboard LED for output
  digitalWrite(arduinoLED, LOW);   // default to LED off
 }

void loop() {
// put your main code here, to run repeatedly:
//delay (20000);
//char comein=Serial.read();
//Serial.println(comein);
char *arg = "hello";
if (Serial.read()== 'P'){


digitalWrite(arduinoLED, HIGH);
delay(5000);
}
else {
digitalWrite(arduinoLED, LOW);
Serial.println("Hello World");
}
}

 #include <SerialCommand.h>

 #define arduinoLED 12   // Arduino LED on board

 SerialCommand SCmd;   // The demo SerialCommand object

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  pinMode(arduinoLED, OUTPUT);     // Configure the onboard LED for output
  digitalWrite(arduinoLED, LOW);   // default to LED off


  SCmd.addCommand("P1", process_command1); // Converts two arguments to integers and echos them back
  SCmd.addCommand("P", relay1_on);       // Turns Relay1 on
  SCmd.addDefaultHandler(unrecognized);  // Handler for command that isn't matched  (says "What?")
  Serial.println("Ready");
  }

  void loop() {
  // put your main code here, to run repeatedly:

  SCmd.readSerial();     // We don't do much, just process serial commands


 }

 void relay1_on()
{
  digitalWrite(12, HIGH);
  Serial.println(3000);
  delay(3000);
  digitalWrite(12, LOW);
 }

void process_command1()
{
  int aNumber = 5;
  char *arg = "hello";

  Serial.println("We're in process_command");
  arg = SCmd.next();
  int OhmPosition = atoi(arg); //will return only numbers
  arg = SCmd.next();
  int relay = atoi(arg); //will return only numbers
  arg = SCmd.next();
  int opentime = atoi(arg); //will return only numbers

  Serial.println(OhmPosition);
  Serial.println(relay);
  Serial.println(opentime);
  }

Python代码：

ser.open()
ser.is_open

my_string='P'
my_string_as_bytes=str.encode(my_string)
print(my_string_as_bytes)
ser.write(my_string_as_bytes)

my_string6 = 'P1'+str(actions_time_[0][0] )+' '+str(actions_time_[0][1])+' '+str(actions_time_[0][2]))
my_string_as_bytes=str.encode(my_string6)
print(my_string_as_bytes)
ser.write(my_string_as_bytes)
output looks like this=> b'P1 150.0 5.0 2000.0 '

这很好，可以打开我的LED，但我如何才能管理多个命令字母，例如“P1 2018”以打开LED

但我真正的问题是，我尝试做完全相同的事情，使用相同的Python代码，但使用

SCmd.readSerial（）

来读取Arduino中的信息，例如：

Arduino代码：

#define arduinoLED 12   // Arduino LED on board

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(arduinoLED, OUTPUT);     // Configure the onboard LED for output
  digitalWrite(arduinoLED, LOW);   // default to LED off
 }

void loop() {
// put your main code here, to run repeatedly:
//delay (20000);
//char comein=Serial.read();
//Serial.println(comein);
char *arg = "hello";
if (Serial.read()== 'P'){


digitalWrite(arduinoLED, HIGH);
delay(5000);
}
else {
digitalWrite(arduinoLED, LOW);
Serial.println("Hello World");
}
}

 #include <SerialCommand.h>

 #define arduinoLED 12   // Arduino LED on board

 SerialCommand SCmd;   // The demo SerialCommand object

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  pinMode(arduinoLED, OUTPUT);     // Configure the onboard LED for output
  digitalWrite(arduinoLED, LOW);   // default to LED off


  SCmd.addCommand("P1", process_command1); // Converts two arguments to integers and echos them back
  SCmd.addCommand("P", relay1_on);       // Turns Relay1 on
  SCmd.addDefaultHandler(unrecognized);  // Handler for command that isn't matched  (says "What?")
  Serial.println("Ready");
  }

  void loop() {
  // put your main code here, to run repeatedly:

  SCmd.readSerial();     // We don't do much, just process serial commands


 }

 void relay1_on()
{
  digitalWrite(12, HIGH);
  Serial.println(3000);
  delay(3000);
  digitalWrite(12, LOW);
 }

void process_command1()
{
  int aNumber = 5;
  char *arg = "hello";

  Serial.println("We're in process_command");
  arg = SCmd.next();
  int OhmPosition = atoi(arg); //will return only numbers
  arg = SCmd.next();
  int relay = atoi(arg); //will return only numbers
  arg = SCmd.next();
  int opentime = atoi(arg); //will return only numbers

  Serial.println(OhmPosition);
  Serial.println(relay);
  Serial.println(opentime);
  }

为了使我能够启动P1命令并发送值，这些值将保存在

OhmPosition

继电器中，时间将由一个空格分隔，因为目标是引导一个小型电气系统

---

如果您能支持这对相互关联的点，我将非常高兴。

您的程序如何区分接收“P1”命令和接收“p”命令后随机出现的“1”命令

---

您的代码似乎依赖的库不是Arduino安装的标准部分。您应该提供一个指向SerialCommand类的链接

嗨，Delta_G，用于SCmd命令的库如下所示：程序重新识别'p'或'P1'，因为它是在void setup（）中arduino代码的SCmd.addCommand部分中定义的。嗨，大家好，多亏了Skarab，我找到了答案，主要问题是我的命令末尾没有“\r\n”。