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
Parts Required
Here are the parts I used
you can connect to the sensor using a standard header the classic dupont style jumper wire.
Name | Link | |
ESP32 | ||
HDC1080 | ||
Connecting cables |
Connection
This was connected a Wemos Lolin32
ESP32 connection | Module connection |
3v3 | 3v3 |
GND | GND |
SDA – 21 | SDA |
SCL – 22 | SCL |
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=21.75C, RH=28.00%
T=21.60C, RH=28.21%
T=25.36C, RH=32.17%
T=27.87C, RH=43.27%
T=27.42C, RH=40.23%
T=26.90C, RH=32.15%
T=26.41C, RH=27.84%
T=26.00C, RH=25.77%
T=25.59C, RH=24.80%
T=25.15C, RH=24.43%
T=24.81C, RH=24.34%
T=24.45C, RH=24.47%
T=24.13C, RH=24.68%
T=23.82C, RH=24.89%
T=23.55C, RH=25.30%
T=23.26C, RH=25.72%
T=23.01C, RH=26.14%
T=22.71C, RH=26.64%
T=22.49C, RH=26.96%
T=22.28C, RH=27.27%
Links
http://www.ti.com/lit/gpn/hdc1080
http://www.ti.com/lit/pdf/snau189