请问我每次运行程序,窗口都会显示ds.search(addr)错误,请问一下是哪里出来问题
#include <OneWire.h> int DS18S20_Pin = 2; //DS18S20 Signal pin on digital 2 //Temperature chip i/o
OneWire ds(DS18S20_Pin); // on digital pin 2
void setup(void) { Serial.begin(9600); }
void loop(void) {
float temperature = getTemp();
Serial.println(temperature);
delay(100); //just here to slow down the output so it is easier to read }
float getTemp(){ //returns the temperature from one DS18S20 in DEG Celsius
byte data[;
byte addr[;
if ( !ds.search(addr)) { //no more sensors on chain, reset search
ds.reset_search();
return -1000; }
if ( OneWire::crc8( addr, 7) != addr[7]
{
Serial.println("CRC is not valid!");
return -1000; }
if ( addr[ != 0x10 && addr[0] != 0x28)
{
Serial.print("Device is not recognized");
return -1000; }
ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end
byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for (int i = 0; i < 9; i++) { // we need 9 bytes data[i] = ds.read(); }
ds.reset_search();
byte MSB = data[1];
byte LSB = data[0];
float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;
return TemperatureSum; }