Python GUI tkinter arduino 串行数据

Question

好的，我试图通过串口将我的数据从 arduino 分离到 python GUI tkinter

示例：我有一个湿度和温度传感器，还有一个灯。我希望 Python GUI 读取串行通信并将数据存储在单独的字符串中（温度、湿度、光）

Python 代码

import tkinter as tk
import serial #Serial imported for Serial communication
import time #Required to use delay functions
 
# Create the master object
root = tk.Tk()

ArduinoSerial = serial.Serial('com5',9600) #Create Serial port object called arduinoSerialData
time.sleep(2)

humidity = tk.Label(root, text=ArduinoSerial.readline())
humidity.grid(row=0, column=0)

templabel = tk.Label(root, text="Temperature :" )
tempEntry = tk.Label(root, text=ArduinoSerial.readline() )

templabel.grid(row=1, column=0)
tempEntry.grid(row=1, column=2)

root.mainloop()

Arduino 代码

#include <DHT.h>
#include <Wire.h>
#include <SPI.h>

int relayPin = 5; 
int relayPinW = 6;
int sOn = 3;
char serialData;

DHT my_sensor (3, DHT22);

float temperature, humidity;

void setup(){
  Serial.begin(9600);
  my_sensor.begin();
   pinMode (relayPin, OUTPUT);
   pinMode (relayPinW, OUTPUT);
  
}

void loop() {
  
  //digitalWrite(relayPin, HIGH);
  //Serial.print("Nano - Relay Open \n");
  //delay(8000);

  //if(sOn > 0){
  //digitalWrite(relayPin, LOW);
  //Serial.print("Nano - Relay CLOSED \n");
  //delay(8000);
  //}
  
  digitalWrite(relayPinW, HIGH);
  Serial.print("Nano - Water Pump is now active \n");
  delay(8000);
  
  digitalWrite(relayPinW, LOW);
  Serial.print("Nano - Water Pump OFF \n");
  delay(8000);
  
 if(humidity > 1)
  {
     digitalWrite(6, HIGH);
     Serial.print("Humidifer Is Now ** ON ** PIN5 \n");
  } else { 
    Serial.print("ERROR with Digital Write PIN");
  }
  if(Serial.available() > 0)
  serialData = Serial.read();
  Serial.print(serialData);
 
  humidity = my_sensor.readHumidity();
  temperature = my_sensor.readTemperature();

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print("C / Humidity: ");
  Serial.print(humidity);
  Serial.println("%");
    
  
}

这可行，但我希望将数据分成自己的变量，我必须解码或编码吗？我很迷茫...谢谢！

Answer 1

嗨，嗨
你只需要格式化类型
意味着在你的 python 代码中
它在哪里\

humidity = tk.Label(root, text=ArduinoSerial.readline())
humidity.grid(row=0, column=0)

templabel = tk.Label(root, text="Temperature :" )
tempEntry = tk.Label(root, text=ArduinoSerial.readline() )

只有你unicode函数 表示您的代码应如下所示：- \

humidity = tk.Label(root, text=unicode(ArduinoSerial.readline()))
humidity.grid(row=0, column=0)

templabel = tk.Label(root, text="Temperature :" )
tempEntry = tk.Label(root, text=unicode(ArduinoSerial.readline()) )

它将解决您的问题。 但这有一个缺点，因为您要串行打印太多东西
所以，
你需要优化你的 Arduino 代码

最后一个小提示：- 您可以使用println() 函数代替print("....\n")

Answer 2

首先，您需要在线程中进行串行读取，这样它就不会阻塞主应用程序。其次，双方必须在数据格式上妥协。

以下是根据您的代码修改的示例：

import tkinter as tk
import serial #Serial imported for Serial communication
import threading

# Create the master object
root = tk.Tk()

ArduinoSerial = serial.Serial('com5', 9600) #Create Serial port object called arduinoSerialData

def arduino_handler():
    while True:
        data = ArduinoSerial.readline().strip()
        if data.startswith("Temperature:"):
            temperature.set(data.split(":")[1])
        elif data.startswith("Humidity:"):
            humidity.set(data.split(":")[1])

tk.Label(root, text="Humidity:").grid(row=0, column=0, sticky='w')
humidity = tk.StringVar()
tk.Label(root, textvariable=humidity).grid(row=0, column=1, sticky='w')

tk.Label(root, text="Temperature:" ).grid(row=1, column=0, sticky='w')
temperature = tk.StringVar()
tk.Label(root, textvariable=temperature).grid(row=1, column=1, sticky='w')

threading.Thread(target=arduino_handler, daemon=True).start()
root.mainloop()

然后更新Arduino程序以输出所需的格式：

void loop() {
    digitalWrite(relayPinW, HIGH);
    Serial.println("Nano - Water Pump is now active");
    delay(8000);

    digitalWrite(relayPinW, LOW);
    Serial.println("Nano - Water Pump OFF");
    delay(8000);

    if(humidity > 1)
    {
        digitalWrite(6, HIGH);
        Serial.println("Humidifer Is Now ** ON ** PIN5");
    } else {
        Serial.println("ERROR with Digital Write PIN");
    }
    if (Serial.available() > 0) {
        serialData = Serial.read();
        Serial.print(serialData);

        humidity = my_sensor.readHumidity();
        temperature = my_sensor.readTemperature();

        Serial.print("Temperature:");
        Serial.println(temperature);
        Serial.print("Humidity:");
        Serial.print(humidity);
        Serial.println("%");
    }
}