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現(xiàn)在我們將做氧氣水平。我們將選擇虛擬V2引腳，我們將選擇從0 到 100的值，給它一些顏色，我給它藍(lán)色，我們將設(shè)置一秒刷新率。我們將對(duì)具有相同引腳的值顯示設(shè)置執(zhí)行相同的操作，即V2相同的值0 到 100以及一秒的刷新率和顏色。

代碼：物聯(lián)網(wǎng)脈搏血氧儀

//nextpcb

#include 
#include "MAX30100_PulseOximeter.h"
#define BLYNK_PRINT Serial
#include 
#include 
#include 
 
#include "Wire.h"
#include "Adafruit_GFX.h"
#include "OakOLED.h"
 
#define REPORTING_PERIOD_MS 1000
OakOLED oled;
 
char auth[] = "--------------------";             // Authentication Token Sent by Blynk
char ssid[] = "--------";        //WiFi SSID
char pass[] = "--------";        //WiFi Password
 
// Connections : SCL PIN - D1 , SDA PIN - D2 , INT PIN - D0
PulseOximeter pox;
 
float BPM, SpO2;
uint32_t tsLastReport = 0;
 
const unsigned char bitmap [] PROGMEM=
{
0x00, 0x00, 0x00, 0x00, 0x01, 0x80, 0x18, 0x00, 0x0f, 0xe0, 0x7f, 0x00, 0x3f, 0xf9, 0xff, 0xc0,
0x7f, 0xf9, 0xff, 0xc0, 0x7f, 0xff, 0xff, 0xe0, 0x7f, 0xff, 0xff, 0xe0, 0xff, 0xff, 0xff, 0xf0,
0xff, 0xf7, 0xff, 0xf0, 0xff, 0xe7, 0xff, 0xf0, 0xff, 0xe7, 0xff, 0xf0, 0x7f, 0xdb, 0xff, 0xe0,
0x7f, 0x9b, 0xff, 0xe0, 0x00, 0x3b, 0xc0, 0x00, 0x3f, 0xf9, 0x9f, 0xc0, 0x3f, 0xfd, 0xbf, 0xc0,
0x1f, 0xfd, 0xbf, 0x80, 0x0f, 0xfd, 0x7f, 0x00, 0x07, 0xfe, 0x7e, 0x00, 0x03, 0xfe, 0xfc, 0x00,
0x01, 0xff, 0xf8, 0x00, 0x00, 0xff, 0xf0, 0x00, 0x00, 0x7f, 0xe0, 0x00, 0x00, 0x3f, 0xc0, 0x00,
0x00, 0x0f, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
 
void onBeatDetected()
{
    Serial.println("Beat Detected!");
    oled.drawBitmap( 60, 20, bitmap, 28, 28, 1);
    oled.display();
}
 
void setup()
{
    Serial.begin(115200);
    oled.begin();
    oled.clearDisplay();
    oled.setTextSize(1);
    oled.setTextColor(1);
    oled.setCursor(0, 0);
 
    oled.println("Initializing pulse oximeter..");
    oled.display();
    
    pinMode(16, OUTPUT);
    Blynk.begin(auth, ssid, pass);
 
    Serial.print("Initializing Pulse Oximeter..");
 
    if (!pox.begin())
    {
         Serial.println("FAILED");
         oled.clearDisplay();
         oled.setTextSize(1);
         oled.setTextColor(1);
         oled.setCursor(0, 0);
         oled.println("FAILED");
         oled.display();
         for(;;);
    }
    else
    {
         oled.clearDisplay();
         oled.setTextSize(1);
         oled.setTextColor(1);
         oled.setCursor(0, 0);
         oled.println("SUCCESS");
         oled.display();
         Serial.println("SUCCESS");
         pox.setOnBeatDetectedCallback(onBeatDetected);
    }
 
    // The default current for the IR LED is 50mA and it could be changed by uncommenting the following line.
     //pox.setIRLedCurrent(MAX30100_LED_CURR_7_6MA);
 
}
 
void loop()
{
    pox.update();
    Blynk.run();
 
    BPM = pox.getHeartRate();
    SpO2 = pox.getSpO2();
    if (millis() - tsLastReport > REPORTING_PERIOD_MS)
    {
        Serial.print("Heart rate:");
        Serial.print(BPM);
        Serial.print(" SpO2:");
        Serial.print(SpO2);
        Serial.println(" %");
 
        Blynk.virtualWrite(V7, BPM);
        Blynk.virtualWrite(V8, SpO2);
        
        oled.clearDisplay();
        oled.setTextSize(1);
        oled.setTextColor(1);
        oled.setCursor(0,16);
        oled.println(pox.getHeartRate());
 
        oled.setTextSize(1);
        oled.setTextColor(1);
        oled.setCursor(0, 0);
        oled.println("Heart BPM");
 
        oled.setTextSize(1);
        oled.setTextColor(1);
        oled.setCursor(0, 30);
        oled.println("Spo2");
 
        oled.setTextSize(1);
        oled.setTextColor(1);
        oled.setCursor(0,45);
        oled.println(pox.getSpO2());
        oled.display();
 
        tsLastReport = millis();
    }
}

現(xiàn)在將您的 ESP8266 NodeMCU 板與您的計(jì)算機(jī)連接起來(lái)。復(fù)制上面的源代碼。首先，在配置應(yīng)用程序時(shí)輸入眨眼發(fā)送給您的身份驗(yàn)證令牌。現(xiàn)在，輸入您的WiFi 名稱和 WiFi 密碼。最后選擇NodeMCU 12 E-board的板子，選擇COM口，上傳代碼。

測(cè)試物聯(lián)網(wǎng)脈搏血氧儀

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結(jié)論

這就是使用 ESP8266 和 Blynk 的基于物聯(lián)網(wǎng)的脈搏血氧儀的全部?jī)?nèi)容。所以朋友們，我希望你們喜歡這個(gè)教程。

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