Franz Pucher / ESP32

Hardwarenahe Programmierung

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ESP32 LM75B Programmierung

Die mbed I2C Programmierung wird an Hand des Temperatursensors LM75B am ESP32 über das AddOn Board PBPCB1 für das mbed-Application-Board hier gezeigt:

#include <Wire.h>

#define LM75B_address 0x48          // A0=A1=A2=Low
#define temp_reg      0x00          //Temperture register
#define conf_reg      0x01          //Configuration register

signed int temp_data = 0; 
double temp = 0.0;
 
void setup()
{   
  Wire.begin();
  Serial.begin(115200);

  Wire.beginTransmission(LM75B_address);
  Wire.write(temp_reg); 
  Wire.endTransmission();
}
 
void loop()
{
  Wire.requestFrom(LM75B_address, 2);           
  while(Wire.available()){
    temp_data = (Wire.read() << 8);
    temp_data |= Wire.read(); 
  }
 
  temp = (temp_data >> 5) * 0.125;
 
  Serial.print(temp);
  Serial.println(" grdC");
  delay(500);
}
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