【Mind+Python】基于BMP280气压传感器的玻意耳定律演示器

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/*!

 * MindPlus

 *

 */

#include

#include

#include

// 动态变量

String         mind_s_data;

volatile float mind_n_Temp, mind_n_Pres;

// 函数声明

String numberRetain(float t, uint8_t n);

// 创建对象

DFRobot_BMP280 bme280;

DFRobot_Iot        myIot;

DFRobot_UDPServer  myserver;

// 主程序开始

void setup() {

mPython.begin();

bme280.begin(0x76);

mind_n_Temp = 0;

mind_n_Pres = 0;

display.fillScreen(0);

display.setCursorLine(1);

display.printLine("网络连接中...");

myIot.wifiConnect("testwifi", "12345678");

while (!myIot.wifiStatus()) {yield();}

display.fillInLine(1, 0);

display.setCursorLine(1);

display.printLine("网络建立成功");

delay(3000);

display.fillInLine(1, 0);

display.setCursorLine(1);

display.printLine("        温度气压测量");

myserver.setPort(8888);

}

void loop() {

mind_n_Pres = (String((bme280.getPressure() / 100)).toInt());

mind_n_Temp = (String((round((bme280.getTemperature() + 273.15)))).toInt());

mind_s_data = (String(mind_n_Pres) + String((String(":") + String(mind_n_Temp))));

myserver.sendUdpMsg(mind_s_data);

display.setCursorLine(2);

display.printLine((String("    温度：") + String((String(numberRetain(mind_n_Temp,0)) + String("K")))));

display.setCursorLine(3);

display.printLine((String("    压强：") + String((String(numberRetain(mind_n_Pres,0)) + String("hPa")))));

display.setCursorLine(4);

display.printLine("数据发送中...");

delay(1000);

}

// 静态函数

String numberRetain(float t, uint8_t n)

{

  String str=t<0 ? "-" : ""; int8_t _n=n; t=abs(t);

  for(; _n>=0; --_n){

    uint32_t integer = floor(t);

    float decimal = t - integer;

    str += _n == n ? (String(integer) + (n ? "." : "")) : integer;

    t = decimal*10;

  }

  return str;

}

from matplotlib import pyplot as plt

import matplotlib.animation as animation

import datetime as dt

import matplotlib

import time

import socket

# 创建套接字

udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

# 绑定一个本地信息

localaddr = ("192.168.137.1",8888) # 必须绑定自己电脑IP和port

udp_socket.bind(localaddr)

data = []

matplotlib.rcParams['font.family'] = 'FangSong'

fig = plt.figure(num = '气体温度压强测量', figsize=(12, 6), dpi = 100)

ax1 = fig.add_subplot(1, 1, 1)

ax1.yaxis.set_tick_params(labelcolor='b')

ax1.yaxis.set_tick_params(color='b')

ax2 = ax1.twinx()

ax2.yaxis.set_tick_params(labelcolor='r')

ax2.yaxis.set_tick_params(color='r')

xs = []

ys1 = []

ys2 = []

def animate(i, xs, ys1,ys2):

    recv_data = udp_socket.recvfrom(1024)

    recv_msg = recv_data[0]

    send_addr = recv_data[1]

    data = recv_msg.decode("gbk").split(":")

    press = int(eval(data[0]))

    temp = int(eval(data[1]))

    xs.append(dt.datetime.now().strftime('%H:%M:%S'))

    ys1.append(press)

    ys2.append(temp)

    xs = xs[-20:]

    ys1 = ys1[-20:]

    ys2 = ys2[-20:]

    ax1.clear()

    ax2.clear()

    ax1.set_ylabel('气压P/×100Pa', color = 'b', size = 15)

    ax1.set_ylim(300,1600)

    ax1.tick_params('x', labelrotation=45)

    ax2.set_ylabel('热力学温度T/K', color = 'r', size = 15)

    ax2.set_ylim(270,380)

    ax1.plot(xs, ys1, 'b.-')

    ax2.plot(xs, ys2, 'r.:')

    plt.title('测量气体压强、温度', size = 20)

    for a, b, c in zip(xs, ys1, ys2):

        ax1.text(a, b, b, ha='center', va='bottom', color = 'b', fontsize=15, alpha = 0.5)

        ax2.text(a, c, c, ha='center', va='bottom', color = 'r', fontsize=15, alpha = 0.5)

ani = animation.FuncAnimation(fig, animate, fargs=(xs, ys1,ys2), interval=1000)

plt.show()

udp_socket.close()

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