Question

我有4个传感器，其中一个传感器始终显示错误的温度。这不是传感器的问题，但这是代码的问题，因为我检查了它。

void getTemperature() {
  float tempC;
  float tempC3;
  float tempC2;
  float tempC4;
  do {
    DS18B20.requestTemperatures(); 
    tempC = DS18B20.getTempCByIndex(0);
    dtostrf(tempC, 2, 2, temperatureCString);
    tempC3 = DS18B20.getTempFByIndex(1);
    dtostrf(tempC3, 3, 2, temperatureCString3);
    tempC2 = DS18B20.getTempCByIndex(2);
    dtostrf(tempC2, 4, 2, temperatureCString2);
    tempC4 = DS18B20.getTempCByIndex(3);
    dtostrf(tempC4, 5, 2, temperatureCString4);
    delay(100);
  } while (tempC == 85.0 || tempC == (-127.0));
}

发送数据。

if (c == '\n' && blank_line) {
        getTemperature();
        client.println("HTTP/1.1 200 OK");
        client.println("Content-Type: application/json");
        client.println("Connection: close");
        client.println();
        // your actual web page that displays temperature
        client.print("[");
        client.print(temperatureCString);
         client.print(",");
         client.print(temperatureCString2);
         client.print(",");
         client.print(temperatureCString3);
         client.print(",");
         client.print(temperatureCString4);
         client.print("]");

        break;
    }
    if (c == '\n') {
      // when starts reading a new line
      blank_line = true;
    }
    else if (c != '\r') {
      // when finds a character on the current line
      blank_line = false;
    }
  }
}  
// closing the client connection
delay(1);
client.stop();
Serial.println("Client disconnected.");
  }

我在这里看到的是：https://screenshots.firefox.com/IStMqTgJTI2lmLxz/192.168.0.242 当我只剩下一个传感器时，我会看到以下信息： https://screenshots.firefox.com/sSXSYmcQbDLF9mUj/192.168.0.242 即使3rd（id 2）传感器不在时，也始终显示错误的温度。你们有些人有主意吗？

多个DS18B20传感器之一显示错误的温度

0 个答案: