了解 Sensirion 品牌：
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Sensirion[/caption] Sensirion 传感器公司位于瑞士的苏黎世，是一个飞速发展的高新技术企业。它生产的数字式温湿度传感器、微差压传感器、气体流量计、气体流量控制器、液体流量控制器等产品均采用了领先世界的CMOSensR专利数字传感技术，其产品以其卓越的品质成为世界温湿度传感器领域新的赢家....Sensirion 传感器芯片为客户在全球激励竞争的市场提供了无泄可击的优势:低价位,高精度和卓越的稳定性。 官方网站：http://www.sensirion.com.cn [caption id="attachment_118" align="alignnone" width="400"]
SHT10 Sensor Photo[/caption]
图解：
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Arduino 连接 SHT1x 传感器[/caption]
使用封装库调试方法：
#include #define dataPin 10 // DATA #define clockPin 11 // SCK
SHT1x sht1x(dataPin, clockPin); void setup() { Serial.begin(9600); Serial.println("Starting up"); }
void loop() { float temp_c; float temp_f; float humidity; // Read values from the sensor temp_c = sht1x.readTemperatureC(); temp_f = sht1x.readTemperatureF(); humidity = sht1x.readHumidity();
//@Print the values to the serial port Serial.print("Temperature: "); Serial.print(temp_c, DEC); Serial.print("C / "); Serial.print(temp_f, DEC); Serial.print("F. Humidity: "); Serial.print(humidity); Serial.println("%"); delay(2000); }
Github: https://github.com/practicalarduino/SHT1x
不使用封装库的方法：
int SHT_clockPin = 3; // pin used for clock int SHT_dataPin = 2; // pin used for data
void setup(){ Serial.begin(9600); // open serial at 9600 bps }
void loop(){ //@these can take a bit to get the values (100ms or so) float temperature = getTemperature(); float humidity = getHumidity();
Serial.print(temperature); Serial.print(" | "); Serial.println(humidity); }
float getTemperature(){ //Return Temperature in Celsius SHT_sendCommand(B00000011, SHT_dataPin, SHT_clockPin); SHT_waitForResult(SHT_dataPin);
int val = SHT_getData(SHT_dataPin, SHT_clockPin); SHT_skipCrc(SHT_dataPin, SHT_clockPin); return (float)val * 0.01 - 40; //convert to celsius }
float getHumidity(){ //Return Relative Humidity SHT_sendCommand(B00000101, SHT_dataPin, SHT_clockPin); SHT_waitForResult(SHT_dataPin); int val = SHT_getData(SHT_dataPin, SHT_clockPin); SHT_skipCrc(SHT_dataPin, SHT_clockPin); return -4.0 + 0.0405 * val + -0.0000028 * val * val; }
void SHT_sendCommand(int command, int dataPin, int clockPin){ // send a command to the SHTx sensor // transmission start pinMode(dataPin, OUTPUT); pinMode(clockPin, OUTPUT); digitalWrite(dataPin, HIGH); digitalWrite(clockPin, HIGH); digitalWrite(dataPin, LOW); digitalWrite(clockPin, LOW); digitalWrite(clockPin, HIGH); digitalWrite(dataPin, HIGH); digitalWrite(clockPin, LOW);
// shift out the command (the 3 MSB are address and must be 000, the last 5 bits are the command) shiftOut(dataPin, clockPin, MSBFIRST, command);
// verify we get the right ACK digitalWrite(clockPin, HIGH); pinMode(dataPin, INPUT);
if (digitalRead(dataPin)) Serial.println("ACK error 0"); digitalWrite(clockPin, LOW); if (!digitalRead(dataPin)) Serial.println("ACK error 1"); }
void SHT_waitForResult(int dataPin){ // wait for the SHTx answer pinMode(dataPin, INPUT);
int ack; //acknowledgement
//need to wait up to 2 seconds for the value for (int i = 0; i < 1000; ++i){ delay(2); ack = digitalRead(dataPin); if (ack == LOW) break; }
if (ack == HIGH) Serial.println("ACK error 2"); }
int SHT_getData(int dataPin, int clockPin){ // get data from the SHTx sensor
// get the MSB (most significant bits) pinMode(dataPin, INPUT); pinMode(clockPin, OUTPUT); byte MSB = shiftIn(dataPin, clockPin, MSBFIRST);
// send the required ACK pinMode(dataPin, OUTPUT); digitalWrite(dataPin, HIGH); digitalWrite(dataPin, LOW); digitalWrite(clockPin, HIGH); digitalWrite(clockPin, LOW);
// get the LSB (less significant bits) pinMode(dataPin, INPUT); byte LSB = shiftIn(dataPin, clockPin, MSBFIRST); return ((MSB << 8) | LSB); //combine bits }
void SHT_skipCrc(int dataPin, int clockPin){ // skip CRC data from the SHTx sensor pinMode(dataPin, OUTPUT); pinMode(clockPin, OUTPUT); digitalWrite(dataPin, HIGH); digitalWrite(clockPin, HIGH); digitalWrite(clockPin, LOW); } 规格书下载： Sensirion SHT1x Humdity Sensor