写一段ds18b20温度传感器的代码

#include <OneWire.h>

// Pin used for the OneWire communication
#define ONE_WIRE_BUS 2

// Setup a oneWire instance to communicate with any OneWire devices
OneWire oneWire(ONE_WIRE_BUS);

void setup() {
Serial.begin(9600);
}

void loop() {
byte i;
byte present = 0;
byte type_s;
byte data[12];
byte addr[8];

// Reset the OneWire bus
oneWire.reset_search();

// Search for OneWire devices on the bus
while (oneWire.search(addr)) {
// Check if the device found is a DS18B20
if (addr[0] == 0x28) {
// Send the device a command to start temperature conversion
oneWire.reset();
oneWire.select(addr);
oneWire.write(0x44, 1);

// Wait for the temperature conversion to complete
delay(1000);

// Reset the OneWire bus and select the device
oneWire.reset();
oneWire.select(addr);

// Send the device a command to read the scratchpad memory
oneWire.write(0xBE);

// Read the scratchpad memory and store the data in the data array
for (i = 0; i < 9; i++) {
data[i] = oneWire.read();
}

// Calculate the temperature in Celsius
int16_t raw = (data[1] << 8) | data[0];
float celsius = (float)raw / 16.0;

// Print the temperature to the serial monitor
Serial.print("Temperature: ");
Serial.print(celsius);
Serial.println(" C");
}
}
}