STM32 Nucleo and HDC1080 humidity and temperature sensor Arduino example

OK we are now going to look at an HDC1080 attached to the STM32 Nucleo and all development will be done on the Arduino IDE – Install STM32 support in the Arduino IDE

The HDC1080 is a digital humidity sensor with integrated temperature sensor that provides excellent measurement accuracy at very low power. The HDC1080 operates over a wide supply range, and is a low cost, low power alternative to competitive solutions in a wide range of common applications. The humidity and temperature sensors are factory calibrated.

Features
Relative Humidity Accuracy ±2% (typical)
Temperature Accuracy ±0.2°C (typical)
Excellent Stability at High Humidity
14 Bit Measurement Resolution
100 nA Sleep Mode Current

 

Connection

This was connected to an STM32 

 STM32 Nucleo connection  Module connection
 3v3 3v3
 GND  GND
 SDA – A4  SDA
 SCL – A5  SCL

 

Just like this

stm32 and hdc1080
stm32 and hdc1080

Code

You will need to download the following library and install it from  https://github.com/closedcube/ClosedCube_HDC1080_Arduino , this is the default example

#include <Wire.h>
#include "ClosedCube_HDC1080.h"
 
ClosedCube_HDC1080 hdc1080;
 
void setup()
{
Serial.begin(9600);
Serial.println("ClosedCube HDC1080 Arduino Test");
 
// Default settings:
// - Heater off
// - 14 bit Temperature and Humidity Measurement Resolutions
hdc1080.begin(0x40);
 
Serial.print("Manufacturer ID=0x");
Serial.println(hdc1080.readManufacturerId(), HEX); // 0x5449 ID of Texas Instruments
Serial.print("Device ID=0x");
Serial.println(hdc1080.readDeviceId(), HEX); // 0x1050 ID of the device
 
printSerialNumber();
 
}
 
void loop()
{
Serial.print("T=");
Serial.print(hdc1080.readTemperature());
Serial.print("C, RH=");
Serial.print(hdc1080.readHumidity());
Serial.println("%");
delay(3000);
}
 
void printSerialNumber() {
Serial.print("Device Serial Number=");
HDC1080_SerialNumber sernum = hdc1080.readSerialNumber();
char format[12];
sprintf(format, "%02X-%04X-%04X", sernum.serialFirst, sernum.serialMid, sernum.serialLast);
Serial.println(format);
}

 

Output

Open the serial monitor window and you should expect to see something like this

T=24.90C, RH=40.74%
T=28.24C, RH=0.00%
T=29.56C, RH=66.76%
T=28.53C, RH=54.55%
T=28.12C, RH=45.72%
T=27.80C, RH=41.20%
T=27.50C, RH=39.14%

 

Links

1PC 2.7 V to 5.5 V HDC1080 high precision temperature and humidity sensor humidity temperature module

http://www.ti.com/lit/gpn/hdc1080

http://www.ti.com/lit/pdf/snau189