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DS18B20

材料：NodeMcu，DS18B20模块(三线)，杜邦线三根(母对母)`。

软件：Arduino(配置好ESP环境)

arduino库：DS18B20，OneWire

连线：+ 3.3v，- GND，DAT D4

#include 
   
    #include 
    
     #define ONE_WIRE_BUS 2 // DS18B20 on NodeMCU pin D4 OneWire oneWire(ONE_WIRE_BUS);DallasTemperature DS18B20(&oneWire);long lastMsg = 0;float temp_0;float temp_1;void setup() {
     Serial.begin(115200);  DS18B20.begin();} void loop() {
       long now = millis();    if (now - lastMsg > 3000) {
         lastMsg = now;      Serial.print("3s发送数据\n");      // Wait a few seconds between measurements      DS18B20.requestTemperatures();       temp_0 = DS18B20.getTempCByIndex(0); // Sensor 0 will capture Temp in Celcius      temp_1 = DS18B20.getTempFByIndex(1); // Sensor 0 will capture Temp in Fahrenheit      Serial.print("Temp_0: ");      Serial.print(temp_0);      Serial.print(" C . Temp_1: ");      Serial.print(temp_1);      Serial.println(" F\n");    }}
    
   

串口效果展示

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