Beetle树莓派RP2350代码篇：心率监测项目

Beetle树莓派RP2350代码篇五稿

2025-05-156197

天眼FAST

UID: 21999

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AI 快速预览详细

本文介绍了如何使用Beetle树莓派RP2350和OLED显示屏实现心率监测。通过解析心率传感器的数据并实时显示BPM值，用户可以轻松搭建心率监测系统。文章提供了详细的代码示例和步骤说明，适合初学者和STEM教育场景。

#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <SoftwareSerial.h>

#define OLED_WIDTH 128
#define OLED_HEIGHT 64
#define OLED_ADDR 0x3C

SoftwareSerial hrSerial(18, 19); // RX=18, TX未用
Adafruit_SSD1306 oled(OLED_WIDTH, OLED_HEIGHT, &Wire, -1);

int bpm = 0;

void setup() {
  Serial.begin(9600);
  hrSerial.begin(9600); // 波特率需与传感器匹配

  // 初始化OLED
  if (!oled.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR)) {
Serial.println("OLED初始化失败");
while (1);
  }
  oled.clearDisplay();
  oled.setTextSize(1);
  oled.setTextColor(SSD1306_WHITE);
  oled.display();
}

void loop() {
  // 读取心率传感器数据
  if (hrSerial.available()) {
String data = hrSerial.readStringUntil('\n');
parseBPM(data); // 解析BPM值
updateDisplay(); // 刷新OLED
  }
}

void parseBPM(String data) {
  // 假设数据格式为"BPM:72"
  int startIdx = data.indexOf("BPM:");
  if (startIdx != -1) {
String valStr = data.substring(startIdx + 4);
bpm = valStr.toInt();
  }
}

void updateDisplay() {
  oled.clearDisplay();
  oled.setCursor(0, 0);
  oled.print("心率监测");
  oled.setCursor(0, 20);
  oled.print("BPM: ");
  oled.print(bpm);
  oled.display();
}

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