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Arduino HDC2010 sensor how to

 

About HDC2010 - temperature and humidity sensor


Texas Instruments HDC2010 it's an high accuracy digital temperature and thumidity sensor. Main measurement characteristics:
- relative humidity range 0% - 100%
- humidity accuracy +-2% (factory calibrated)
- temperature from -40C to +125C (functional) and -40C to +80C (operational)
- typical temperature accuracy +-0.2C (factory calibrated)
- embedded heating element to burn away condensation
More info on: HDC2010 datasheet

In June 2019 we've realeased 6 new environmental and air quality sensors, including HDC2010 I2C sensor breakout and HDC2010+CCS811 I2C combo sensors breakout, all being part of the s-Sense I2C sensor breakout family.


s-Sense HDC2010 sensor breakout by itbrainpower.net

HDC2010 sensor breakout - topHDC2010 sensor breakout - bottom

PN: SS-HDC2010#I2C   SKU: ITBP-6005   HDC2010 I2C sensor breakout info

s-Sense HDC2010+CCS811 sensor breakout by itbrainpower.net

CCS811 + HDC2010 sensor bundle breakout - topHDC2010 + CCS811 sensor breakout - bottom

PN: SS-HDC2010+CCS811#I2C   SKU: ITBP-6006   HDC2010+CCS811 I2C combo sensor breakout info


Next, let's kickstart with HDC2010 sensor I2C breakout - around 10-15 minutes. Same hardware and software approach may be used for CCS811 + HDC2010 bundle sensors I2C breakout.

 

 

 

Arduino HDC2010 sensor hardware integration (basic wiring)


First, identify if your Arduino it's 5V or 3.3V compliant!

The HDC2010 I2C sensor breakout it's shipped in default auto 3-5V compliant configuration. In a nut shell, wire as bellow:

HDC2010 breakout Arduino 5V [Eg.: UNO] Arduino 3.3V [Eg.: Zero]
Vin PAD 5V 3.3V
Vdd PAD (3V3) do not connect do not connect
SDA PAD SDA SDA
SCL PAD SCL SCL
GND PAD GND GND
 

HINT, for some ARDUINO boards:
*         SDA (Serial Data)      --> A4 on Uno/Pro-Mini, 20 on Mega2560/Due, 2 Leonardo/Pro-Micro
*         SCK (Serial Clock)     --> A5 on Uno/Pro-Mini, 21 on Mega2560/Due, 3 Leonardo/Pro-Micro

Bellow, sensor wiring examples, left to right, with Arduino UNO and xyz-mIoT shield [AT SAMD21G, 3.3V compliant, with or without modems]:
HDC2010 sensor breakout Arduino UNO shield wiring HDC2010 sensor breakout xyz-mIoT [Arduino zero like] shield wiring



Arduino HDC2010 sensor software


a. download HDC2010 Arduino library from: here.

b. unzip the library and install in Arduino libraries folder. Restart Arduino.

c. Make a folder named "ssense_HDC2010_example".
Copy the code bellow, paste it one new file and save the file as "ssense_HDC2010_example.ino" in the folder created in previously or, you may download it from here (right click & save as): HDC2010 - read sensor data Arduino code

1/* s-Sense I2C HDC2010 I2C sensor breakout example - v1.0/20190524.
2 * 
3 * This library it's compatible with:
4 *    s-Sense HDC2010 I2C sensor breakout [PN: SS-HDC2010#I2C, SKU: ITBP-6005], info https://itbrainpower.net/sensors/HDC2010-TEMPERATURE-HUMIDITY-I2C-sensor-breakout 
5 *    s-Sense CCS811 + HDC2010 I2C sensor breakout [PN: SS-HDC2010+CCS811#I2C, SKU: ITBP-6006], info https://itbrainpower.net/sensors/CCS811-HDC2010-CO2-TVOC-TEMPERATURE-HUMIDITY-I2C-sensor-breakout
6 * 
7 * HDC2010 temperature and humidity (pulling at 2 second) reading example - based on HDC2010 library written 
8 * by Brandon Fisher and provided by TI. Thank you Brandon! Great job! Read credits bellow and inside the class.
9 * We've just add add some variables, functions and functionalities.
10 * 
11 *  Mandatory wiring:
12 *    Common for 3.3V and 5V Arduino boards:
13 *        sensor I2C SDA  <------> Arduino I2C SDA
14 *        sensor I2C SCL  <------> Arduino I2C SCL
15 *        sensor GND      <------> Arduino GND
16 *    For Arduino 3.3V compatible:
17 *        sensor Vin      <------> Arduino 3.3V
18 *    For Arduino 5V compatible:
19 *        sensor Vin      <------> Arduino 5V
20 *        
21 * Leave other sensor PADS not connected.
22 *  
23 * SPECIAL note for some ARDUINO boards:
24 *        SDA (Serial Data)   ->  A4 on Uno/Pro-Mini, 20 on Mega2560/Due, 2 Leonardo/Pro-Micro
25 *        SCK (Serial Clock)  ->  A5 on Uno/Pro-Mini, 21 on Mega2560/Due, 3 Leonardo/Pro-Micro
26 * 
27 * WIRING WARNING: wrong wiring may damage your Arduino board MCU or your sensor! Double check what you've done.
28 * 
29 * READ HDC2010 documentation! https://itbrainpower.net/downloadables/hdc2010.pdf
30 * 
31 * You are legaly entitled to use this SOFTWARE ONLY IN CONJUNCTION WITH s-Sense HDC2010 I2C sensors DEVICES USAGE. Modifications, derivates and redistribution 
32 * of this software must include unmodified this COPYRIGHT NOTICE. You can redistribute this SOFTWARE and/or modify it under the terms 
33 * of this COPYRIGHT NOTICE. Any other usage may be permited only after written notice of Dragos Iosub / R&D Software Solutions srl.
34 * 
35 * This SOFTWARE is distributed is provide "AS IS" in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
36 * or FITNESS FOR A PARTICULAR PURPOSE.
37 *  
38 *  
39 * itbrainpower.net invests significant time in design phase of our IoT products and in associated software and support resources.
40 * Support us by purchasing our environmental and air quality sensors from here https://itbrainpower.net/order#s-Sense
41 *
42 *
43 *
44 * Dragos Iosub, Bucharest 2019.
45 * https://itbrainpower.net
46 */
47
48/*
49 * HDC2010.ino
50 * Created: August 1st 2017
51 * This sketch is released AS-IS into the public domain, no guarantee or warranty is given.
52 * This Code is not supported by Texas Instruments.
53 * 
54 * Description: This sketch configures the HDC2010 to monitor for a specific temperature 
55 * and humidity range, with regular one second samples. The temperature and humidity readings
56 * of the device are printed to a standard 16x2 LCD display. When the threshold values are
57 * exceeded, the LCD will also have "ALT" printed in the bottom right corner. The schematic 
58 * for this example is included alongside the HDC2010 Arduino Source Code.
59 * 
60 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ 
61 * 
62 *  Redistribution and use in source and binary forms, with or without 
63 *  modification, are permitted provided that the following conditions 
64 *  are met:
65 *
66 *    Redistributions of source code must retain the above copyright 
67 *    notice, this list of conditions and the following disclaimer.
68 *
69 *    Redistributions in binary form must reproduce the above copyright
70 *    notice, this list of conditions and the following disclaimer in the 
71 *    documentation and/or other materials provided with the   
72 *    distribution.
73 *
74 *    Neither the name of Texas Instruments Incorporated nor the names of
75 *    its contributors may be used to endorse or promote products derived
76 *    from this software without specific prior written permission.
77 *
78 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
79 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
80 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
81 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
82 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
83 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
84 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
85 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
86 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
87 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
88 *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
89 *
90*/
91
92#define SERIAL_SPEED  19200
93
94#include <sSense-HDC2010.h>
95
96HDC2010 ssenseHDC2010(HDC2010_I2C_ADDR);
97
98
99float temperature = 0, humidity = 0;
100
101void setup() {
102  pinMode(LED_BUILTIN, OUTPUT);
103  DebugPort.begin(SERIAL_SPEED);
104  delay(5000);
105  DebugPort.println("s-Sense HDC2010 I2C sensor.");
106
107  // Initialize HDC2010(THS) I2C communication
108  ssenseHDC2010.begin();
109    
110  // Begin with a HDC2010(THS) reset
111  ssenseHDC2010.reset();
112
113  // Set up HDC2010(THS) temperature offset, if required
114  //ssenseHDC2010.setTemperatureOffset(0b11010111);    //-6.64 degrees Celsius - determine and set your, see definitions and HDC2010 datasheet
115 
116  // Configure Measurements
117  ssenseHDC2010.setMeasurementMode(TEMP_AND_HUMID);  // Set measurements to temperature and humidity
118  ssenseHDC2010.setRate(ONE_HZ);                     // Set measurement frequency to 1 Hz
119  ssenseHDC2010.setTempRes(FOURTEEN_BIT);
120  ssenseHDC2010.setHumidRes(FOURTEEN_BIT);
121
122  
123  delay(1000);
124
125  //begin HDC2010 sensor measuring
126  ssenseHDC2010.triggerMeasurement();
127}
128
129void loop() {
130  // read temperature and humidity
131  temperature = ssenseHDC2010.readTemp();
132  humidity = ssenseHDC2010.readHumidity();
133
134  DebugPort.print("TEMP(C): ");
135  DebugPort.println(temperature);
136
137  DebugPort.print("%RH: ");
138  DebugPort.println(humidity);
139
140  // Wait 2 second for the next reading
141  delay(2000);
142}
143


c'. The very same code it's available in Arduino "File-> Examples", under "ssense-HDC2010" library.

d. Compile and upload the code to your Arduino shield. The sensor data may be seen on Arduino Serial Monitor (set to 19200bps).


Advanced HDC2010 Arduino feature [windowed mode]

HDC2010 have some interesting features (read datasheet) - one of them being the temperature and humidity "comfort zone" monitoring.

In a nut shell, the HDC2010 firmware compare the temperature and humidity sampled data with defined comfort zone temperature and humidity upper and lower limits. If sampled data are outside the defined window one interrupt it's generated. Window threshold values and IRQ behavior are user programmable.

HDC2010 - windowed mode Arduino code - written to be compatible with Arduino Zero and xyz-mIoT shields - do this job. As hardware preliminary, just wire the shields as shown in basic wiring, up-here, and add wire between sensor PAD9 [placed on sensor bottom] to D6 on Arduino Zero/xyz-mIoT shield.

1/* s-Sense I2C HDC2010 I2C sensor breakout example with confort zone by IRQ - v1.0/20190524.
2 *
3 *   IMPROTANT! IRQ should work for Arduino Zero and xyz-mIoT [AT SAMD21G in Arduino Zero like configuration]  
4 *
5 * This library it's compatible with:
6 *    s-Sense HDC2010 I2C sensor breakout [PN: SS-HDC2010#I2C, SKU: ITBP-6005], info https://itbrainpower.net/sensors/HDC2010-TEMPERATURE-HUMIDITY-I2C-sensor-breakout 
7 *    s-Sense CCS811 + HDC2010 I2C sensor breakout [PN: SS-HDC2010+CCS811#I2C, SKU: ITBP-6006], info https://itbrainpower.net/sensors/CCS811-HDC2010-CO2-TVOC-TEMPERATURE-HUMIDITY-I2C-sensor-breakout
8 * 
9 * HDC2010 temperature and humidity (pulling at 2 second and confort zone -interrupt based) reading example - based on HDC2010 library written 
10 * by Brandon Fisher and provided by TI. Thank you Brandon! Great job! Read credits bellow and inside the class.
11 * We've just add add some variables, functions and functionalities.
12 * 
13 *  Mandatory wiring:
14 *    Common for 3.3V and 5V Arduino boards:
15 *        sensor I2C SDA  <------> Arduino I2C SDA
16 *        sensor I2C SCL  <------> Arduino I2C SCL
17 *        sensor GND      <------> Arduino GND
18 *    For Arduino 3.3V compatible:
19 *        sensor Vin      <------> Arduino 3.3V
20 *    For Arduino 5V compatible:
21 *        sensor Vin      <------> Arduino 5V
22 *        
23 *  Optional wiring (only for INTERRUPT detection):
24 *        sensor PAD9     <------> Arduino D6
25 *   
26 * Leave other sensor PADS not connected.
27 *  
28 * SPECIAL note for some ARDUINO boards:
29 *        SDA (Serial Data)   ->  A4 on Uno/Pro-Mini, 20 on Mega2560/Due, 2 Leonardo/Pro-Micro
30 *        SCK (Serial Clock)  ->  A5 on Uno/Pro-Mini, 21 on Mega2560/Due, 3 Leonardo/Pro-Micro
31 * 
32 * WIRING WARNING: wrong wiring may damage your Arduino board MCU or your sensor! Double check what you've done.
33 * 
34 * READ HDC2010 documentation! https://itbrainpower.net/downloadables/hdc2010.pdf
35 * 
36 * You are legaly entitled to use this SOFTWARE ONLY IN CONJUNCTION WITH s-Sense HDC2010 I2C sensors DEVICES USAGE. Modifications, derivates and redistribution 
37 * of this software must include unmodified this COPYRIGHT NOTICE. You can redistribute this SOFTWARE and/or modify it under the terms 
38 * of this COPYRIGHT NOTICE. Any other usage may be permited only after written notice of Dragos Iosub / R&D Software Solutions srl.
39 * 
40 * This SOFTWARE is distributed is provide "AS IS" in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
41 * or FITNESS FOR A PARTICULAR PURPOSE.
42 *  
43 *  
44 * itbrainpower.net invests significant time in design phase of our IoT products and in associated software and support resources.
45 * Support us by purchasing our environmental and air quality sensors from here https://itbrainpower.net/order#s-Sense
46 *
47 *
48 *
49 * Dragos Iosub, Bucharest 2019.
50 * https://itbrainpower.net
51 */
52
53/*
54 * HDC2010.ino
55 * Created: August 1st 2017
56 * This sketch is released AS-IS into the public domain, no guarantee or warranty is given.
57 * This Code is not supported by Texas Instruments.
58 * 
59 * Description: This sketch configures the HDC2010 to monitor for a specific temperature 
60 * and humidity range, with regular one second samples. The temperature and humidity readings
61 * of the device are printed to a standard 16x2 LCD display. When the threshold values are
62 * exceeded, the LCD will also have "ALT" printed in the bottom right corner. The schematic 
63 * for this example is included alongside the HDC2010 Arduino Source Code.
64 * 
65 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ 
66 * 
67 *  Redistribution and use in source and binary forms, with or without 
68 *  modification, are permitted provided that the following conditions 
69 *  are met:
70 *
71 *    Redistributions of source code must retain the above copyright 
72 *    notice, this list of conditions and the following disclaimer.
73 *
74 *    Redistributions in binary form must reproduce the above copyright
75 *    notice, this list of conditions and the following disclaimer in the 
76 *    documentation and/or other materials provided with the   
77 *    distribution.
78 *
79 *    Neither the name of Texas Instruments Incorporated nor the names of
80 *    its contributors may be used to endorse or promote products derived
81 *    from this software without specific prior written permission.
82 *
83 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
84 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
85 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
86 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
87 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
88 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
89 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
90 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
91 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
92 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
93 *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
94 *
95*/
96
97#define SERIAL_SPEED  19200
98
99#include <sSense-HDC2010.h>
100
101HDC2010 ssenseHDC2010(HDC2010_I2C_ADDR);
102
103
104float temperature = 0, humidity = 0;
105int alarmTHS = 0;
106
107void setup() {
108  pinMode(LED_BUILTIN, OUTPUT);
109  DebugPort.begin(SERIAL_SPEED);
110  delay(5000);
111  DebugPort.println("s-Sense HDC2010 I2C sensor test w. confort zone.");
112  DebugPort.println("this code was writen for Arduino Zero and xyz-mIoT [AT SAMD21G in Arduino Zero like configuration]");
113
114  // Initialize HDC2010(THS) I2C communication
115  ssenseHDC2010.begin();
116    
117  // Begin with a HDC2010(THS) reset
118  ssenseHDC2010.reset();
119
120  // Set up HDC2010(THS) temperature offset, if required
121  //ssenseHDC2010.setTemperatureOffset(0b11010111);    //-6.64 degrees Celsius - determine and set your, see definitions and HDC2010 datasheet
122
123  
124  // Set up HDC2010(THS) comfort zone
125  ssenseHDC2010.setHighTemp(28);         // High temperature of 28C
126  ssenseHDC2010.setLowTemp(24);          // Low temperature of 22C
127  ssenseHDC2010.setHighHumidity(85);     // High humidity of 55%
128  ssenseHDC2010.setLowHumidity(20);      // Low humidity of 40%
129  
130
131  // Configure HDC2010(THS) interrupt mode
132  ssenseHDC2010.enableInterrupt();                   // Enable the Interrupt/DRDY pin
133  ssenseHDC2010.enableThresholdInterrupt();          // Enable Interrupt triggering based on comfort zone
134  ssenseHDC2010.setInterruptPolarity(ACTIVE_HIGH);   // Set Interrupt pin to Active High
135  ssenseHDC2010.setInterruptMode(COMPARATOR_MODE);   // Set Interrupt to return to inactive state when in bounds
136
137  
138  // Configure Measurements
139  ssenseHDC2010.setMeasurementMode(TEMP_AND_HUMID);  // Set measurements to temperature and humidity
140  ssenseHDC2010.setRate(ONE_HZ);                     // Set measurement frequency to 1 Hz
141  ssenseHDC2010.setTempRes(FOURTEEN_BIT);
142  ssenseHDC2010.setHumidRes(FOURTEEN_BIT);
143
144  
145  // Configure HDC2010(THS) Interrupt Pin
146  pinMode(HDC2010_IRQ_PIN, INPUT);                 // HDC2010_IRQ_PIN will be the interrupt input
147  attachInterrupt(digitalPinToInterrupt(HDC2010_IRQ_PIN), alertTHS, CHANGE);  //ISR "alert" will be triggered by changes in HDC2010_IRQ_PIN
148
149  
150  delay(1000);
151
152  //begin HDC2010 sensor measuring
153  ssenseHDC2010.triggerMeasurement();
154}
155
156void loop() {
157  // read temperature and humidity
158  temperature = ssenseHDC2010.readTemp();
159  humidity = ssenseHDC2010.readHumidity();
160
161  DebugPort.print("TEMP(C): ");
162  DebugPort.println(temperature);
163
164  DebugPort.print("%RH: ");
165  DebugPort.println(humidity);
166
167  // Wait 2 second for the next reading
168  delay(2000);
169}
170
171// ISR to print alert on "CONFORT ZONE"
172void alertTHS(void) {
173  //Load the current state of the THS Alert Pin to the alarmTHS variable
174  alarmTHS = digitalRead(HDC2010_IRQ_PIN);
175
176  //If the alert pin was high, print ALT
177  if (alarmTHS)
178    {
179      DebugPort.println("OUTSIDE");
180      digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
181    }
182  //Otherwise overwrite "ALT" with spaces
183  else
184    {
185      DebugPort.println("INSIDE");
186      digitalWrite(LED_BUILTIN, LOW);   // turn the LED on (LOW is the voltage level)
187    }
188}
189


This code it's available also in Arduino "File-> Examples", under "ssense-HDC2010" library.

HINT - to port previous code to other Arduino shields (let's say for Arduino UNO):
* step1. identify one IO INTERRUPT capable pin - Arduino UNO you may like chose D2 or D3.
* step2 -variant a. adapt the alertTHS ISR function and attachInterrupt call in a way to be compatible with your board or,
* step2 -variant b. remove the attachInterrupt call in setup() and pull the alertTHS() function in loop(). In this case you may use any available digital IO.



TUTORIAL PROVIDED WITHOUT ANY WARRANTY!!! USE IT AT YOUR OWN RISK!!!!

 

 

 

 

 

 

Original how to written by Dragos Iosub & itbrainpower.net team

 

 

 

 

document version 1.01 / 2019-07-05 © R&D Software Solutions srl