System: win10 64bits
Arduino IDE: 1.8.5
Arduino development board: UNO

Arduino can easily operate the sensor to obtain sensor data. After getting the data, we are more concerned about data visualization. Arduino comes with a serial monitor and serial plotter. I also found 3 other tools suitable for Arduino serial data plotting. This article The blog is also used as a record to introduce these four drawing methods. The sensor data is the temperature collected by the K-type thermocouple introduced in the previous blog.
(1) Serial port plotter that comes with IDE

Procedure 1

#include <MAX6675_Thermocouple.h>

#define SCK_PIN 3 // The SCK port on the module is connected to pin3
#define CS_PIN  4 // The CS port on the module is connected to pin4
#define SO_PIN  5 // The SO port on the module is connected to pin5
// Don't forget that the 5v and GND on the module should be connected to the arduino development board

MAX6675_Thermocouple* thermocouple = NULL;

// the setup function runs once when you press reset or power the board
void setup() {
  Serial.begin(9600); //Set the serial port baud rate to 9600
  thermocouple = new MAX6675_Thermocouple(SCK_PIN, CS_PIN, SO_PIN);
}

// the loop function runs over and over again forever
void loop() {
  double celsius = thermocouple->readCelsius(); // degrees Celsius

  Serial.println(celsius);  // println printing will automatically add'\r\n', which can be displayed in the serial plotter
  delay(500);// Delay 500ms
}

After the program is executed, just open it. Note that the serial port output in the program should be usedSerial.println , The official introduction of this function is as follows

The drawing shown by the final plotter is as follows

The following three drawing tools can be selected from the toolbar on the IDE [Project]-[Load Library]-[Manage Library], and then search and install

（2）Plotter
Project address:https://github.com/devinaconley/arduino-plotter
Additional drawing tools required:Listener Find the software in the link, select the corresponding version according to your system, note that this requires a JRE environment, JRE download address:
http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html
Procedure 2

#include <MAX6675_Thermocouple.h>
#include "Plotter.h"
double x;
Plotter p;

#define SCK_PIN 3 // The SCK port on the module is connected to pin3
#define CS_PIN 4 // Connect the CS port on the module to pin4
#define SO_PIN 5 // Connect the SO port on the module to pin5
// Don't forget that the 5v and GND on the module should be connected to the arduino development board

MAX6675_Thermocouple* thermocouple = NULL;

// the setup function runs once when you press reset or power the board
void setup() {
  p.Begin();  // Create a plotter
  p.AddTimeGraph( "Temperature of K-type thermalcouple", 100, "temperature", x ); // Add time chart
  // No need to set the baud rate
  thermocouple = new MAX6675_Thermocouple(SCK_PIN, CS_PIN, SO_PIN);
}

// the loop function runs over and over again forever
void loop() {
  double celsius = thermocouple->readCelsius(); // degrees Celsius
  x = celsius;
  p.Plot();
// Serial.println(celsius); // println printing will automatically add'\r\n', which can be displayed on the serial plotter
  delay(500);// Delay 500ms
}

Open the listener and get the result as follows

Use this drawing to refresh and redraw every other period of data. I don’t know how to set this.

（3）FlexiPlot
Project address:https://github.com/xcoder123/FlexiPlot_Arduino
Additional drawing tools required:https://github.com/xcoder123/FlexiPlot/releases

No image can be obtained with this drawing tool

(3) PlotPlus, compatible with SimPlot
Project address:https://github.com/rlogiacco/PlotPlus
Additional drawing tools required:SimPlot (Recommended),Sloeber(An eclipse plugin)
program

#include <MAX6675_Thermocouple.h>
#include <PlotPlus.h>

#define SCK_PIN 3 // The SCK port on the module is connected to pin3
#define CS_PIN 4 // Connect the CS port on the module to pin4
#define SO_PIN 5 // Connect the SO port on the module to pin5
// Don't forget that the 5v and GND on the module should be connected to the arduino development board

MAX6675_Thermocouple* thermocouple = NULL;

// the setup function runs once when you press reset or power the board
void setup() {
  Serial.begin(9600); //Set the serial port baud rate to 9600
  thermocouple = new MAX6675_Thermocouple(SCK_PIN, CS_PIN, SO_PIN);
}

// the loop function runs over and over again forever
void loop() {
  double celsius = thermocouple->readCelsius(); // degrees Celsius
//  double fahrenheit = thermocouple->readFahrenheit(); 
  plot(celsius);
// Serial.println(celsius); // println printing will automatically add'\r\n', which can be displayed on the serial plotter
  delay(500);// Delay 500ms
}

Open simplot, set the serial port and baud rate, and then connect, the results are as follows

in conclusion:
I feel that the other three are not as good as those shipped with the IDE, especially FlexiPlot. Even after the built-in examples are run, the plots cannot be displayed with the provided software. Send the serial port data to the computer for Processing or visualization, the ultimate method is to write a host computer (undergraduate junior did Qt+Qwt based computer, get the data sent to the computer by stm32 and display/save), now there is not so much time to play electronic things I only practiced my hands occasionally during the holidays, and didn’t want to abandon the knowledge I learned, and didn’t want to toss about 51 or STM32. There is also a rich library on the Internet, and common sensors can be found at random. It is very convenient to use it to make small things.