Reports.SHT11 History

Hide minor edits - Show changes to output

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!!!! SHT11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Parallax]]
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!!!! SHT11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Sensrion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Parallax]]

Original Report by [[~ko373|Keunyoung Oh]] Fall 2005
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!!!IV. Code Sample
[[Code. SHT11-seven seg | SHT11 - Basic Stamp2 - Seven segment LED]]

[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - Processing(dandelion)]]

[[Code. SHT11 - processing - perl | SHT11 - Basic Stamp2 - Processing to perl(Processing code)]]

[[Code. SHT11 - perl - mySQL | SHT11 - Basic Stamp2 - perl to mySQL(perl code)]]

[[Code. SHT11 - perl -flash | SHT11 - Basic Stamp2 - perl to Flash(perl script)]]

[[Code. SHT11 - flash logger | SHT11 - Basic Stamp2 - perl to Flash logger(fla file)]]
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!!!IV. Code Samples
*
[[Code.SHT11|SHT11 Basic Stamp2 code]]
* [[Code.
SHT11-seven seg | SHT11 - Basic Stamp2 - Seven segment LED]]
* [[Code. SHT11 - processing | SHT11 - Basic Stamp2 - Processing(dandelion)]]
* [[Code. SHT11 - processing - perl | SHT11 - Basic Stamp2 - Processing to perl(Processing code)]]
* [[Code. SHT11 - perl - mySQL | SHT11 - Basic Stamp2 - perl to mySQL(perl code)]]
* [[Code. SHT11 - perl -flash | SHT11 - Basic Stamp2 - perl to Flash(perl script)]]
* [[Code. SHT11 - flash logger | SHT11 - Basic Stamp2 - perl to Flash logger(fla file)]]
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just use right risistor :4.7 K
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just use right resistor :4.7 K
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--- correction.

just use right risistor :4.7 K
then, it should be fine... I guess.
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[[Code. SHT11 - perl - mySQL | SHT11 - Basic Stamp2 - perl to mySQL(perl code)]]
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[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - Processing to perl(Processing code)]]

[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - perl to Flash(perl script)]]

[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - perl to Flash logger(fla file)]]
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[[Code. SHT11 - processing - perl | SHT11 - Basic Stamp2 - Processing to perl(Processing code)]]

[[Code. SHT11 - perl -flash | SHT11 - Basic Stamp2 - perl to Flash(perl script)]]

[[Code. SHT11 - flash logger | SHT11 - Basic Stamp2 - perl to Flash logger(fla file)]]
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[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - Processing]]
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[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - Processing(dandelion)]]

[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - Processing to perl(Processing code)]]

[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - perl to Flash(perl script)]]

[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - perl to Flash logger(fla file)
]]
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!!!! SHT11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
to:
!!!! SHT11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Parallax]]
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!!!! STH11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
to:
!!!! SHT11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
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http://itp.nyu.edu/~ko373/sensors/img/command.jpg
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'''Measurement Sequence'''
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As a result, my SHT11 was burned out :-(
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!!!I Measurering Humidity
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!!!I. Measurering Humidity
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!!!II SHT11 (Digital Capacitive Humidity Sensor)
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!!!II. SHT11 (Digital Capacitive Humidity Sensor)
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!!!III Applications
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!!!III. Applications
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_ Air purifier [[http://www.sharp.ca/products/index.asp?cat=75&id=585|Sharp FPR45CX ]](high temp & high humid)


!!!IV Code Sample
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_ Air purifier [[http://www.sharp.ca/products/index.asp?cat=75&id=585|Sharp FPR45CX ]](for specialmode for high temp & high humid)


!!!IV. Code Sample
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!!!V (non-)Typical Behavior
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!!!V. (non-)Typical Behavior
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!!! STH11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
to:
!!!! STH11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
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!!!Measurering Humidity
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!!!I Measurering Humidity
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!!!SHT11 (Digital Capacitive Humidity Sensor)
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!!!II SHT11 (Digital Capacitive Humidity Sensor)
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!!!Applications
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!!!III Applications
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!!!Code Sample
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!!!IV Code Sample
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!!!(non-)Typical Behavior
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!!!V (non-)Typical Behavior
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!!!Application Notes
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[[Code. SHT11 | SHT11 to Seven segment LED]]
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[[Code. SHT11-seven seg | SHT11 - Basic Stamp2 - Seven segment LED]]
[[Code. SHT11 - processing | SHT11 - Basic Stamp2 - Processing
]]
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!!!Typical Behavior
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[[Code. SHT11 | SHT11 to Seven segment LED]]
!!!(non-)
Typical Behavior
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!!!Application Notes
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!!!Code Sample

!!!Typical Behavior

Warning : not recommend use more than 5V. Try below 4.5V unless you need super fast respond.

SCK changes its frequency upto VDD.( VDD>4.5V : 10MHz(max), VDD<4.5V : 1MHz(max))
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!!! STH11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]
From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
to:
!!! STH11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]] From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
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[[http://www.parallax.com/dl/docs/prod/datast/shtx.pdf| Datasheet]]

!
!!!Measurering Humidity
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!!!Measurering Humidity
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!!!SHT11 (Digital Capacitive Humidity Sensors)!!!
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!!!SHT11 (Digital Capacitive Humidity Sensor)
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[[http://www.parallax.com/dl/docs/prod/datast/shtx.pdf| Datasheet]]
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''' 1. sending a command'''
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'''1. sending a command'''
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Serial Data(DATA)

Serial Clock Input(SCK)
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!!!!!
Serial Data(DATA)

!!!!!Serial Clock Input(SCK)
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!!!Converting output to physical valure
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'''3,Converting output to physical valure'''
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http://itp.nyu.edu/~ko373/sensors/img/sht11_2.jpg
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http://itp.nyu.edu/~ko373/sensors/img/sht11_1.jpg
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[[http://www.parallax.com/detail.asp?product_id=28018|From Paralax]]
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From[[http://www.parallax.com/detail.asp?product_id=28018| Paralax]]
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http://itp.nyu.edu/~ko373/sensors/img/Texas1a.jpg
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http://itp.nyu.edu/~ko373/sensors/img/hygro.jpg
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http://itp.nyu.edu/~ko373/sensors/img/capa.jpg
http://itp.nyu.edu/~ko373/sensors/img/fig1.gif
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http://itp.nyu.edu/~ko373/sensors/img/fig1.jpg
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http://itp.nyu.edu/~ko373/sensors/img/hpr-mq01.jpg
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http://itp.nyu.edu/~ko373/sensors/img/resistive.jpg
http://itp.nyu.edu/~ko373/sensors/img/fig2.gif
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http://itp.nyu.edu/~ko373/sensors/img/fig2.jpg
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!!!Converting output to physical valure
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' temperature compensated humidity
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' temperature compensated humidity
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!!!Applications!!!
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!!!Applications
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_ HVAC
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_ HVAC (Heating, Ventilation and Air Conditioning)
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_ Data Logging
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_ Air purifier [[http://www.sharp.ca/products/index.asp?cat=75&id=585|Sharp FPR45CX ]](high temp & high humid)
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MSB : Most Significant Bit
LSB : Least Significant Bit
http://itp.nyu.edu/~ko373/sensors/img/sequence.jpg
0000 1001 0011 0001 = 2353 = 75.79%RH @ 25C

' linearize humidity
rhLin = (soRH ** $67AE) - (soRH ** $83 * soRH ** $5B) - 40
' temperature compensated humidity
rhTrue = (tC - 250) * (soRH ** $34) + rhLin

!!!Applications!!!
_ HVAC
_ Automotive
_ Consumer Goods
_ Weather Stations
_ (De-) Humidifiers
_ Test & Measurement
_ Data Logging
_ Automation
_ White Goods
_ Medical (incubator)
_ Copy machine
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'''SHT11 (Digital Capacitive Humidity Sensors)'''
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!!!SHT11 (Digital Capacitive Humidity Sensors)!!!
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'''* serial interface'''
http://itp.nyu.edu/~ko373/sensors/img/sht1x1.gif
''' 1. sending a command'''
http://itp.nyu.edu/~ko373/sensors/img/start.gif
Serial Data(DATA)
Serial Clock Input(SCK)
- code
http://itp.nyu.edu/~ko373/sensors/img/star_code.gif
'''2.Reading thd data'''
http://itp.nyu.edu/~ko373/sensors/img/2353.jpg
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'''SHT11 (Digital Capacitive Humidity Sensors)'''

The SHTxx is a single chip relative humidity and temperature multi sensor module comprising a calibrated digital output. Application of industrial CMOS processes with patented micro-machining (CMOSensĘ technology) ensures highest reliability and excellent long term stability. The device includes a capacitive polymer sensing element for relative humidity and a bandgap temperature sensor. Both are seamlessly coupled to a 14bit analog to digital converter and a serial interface circuit on the same chip.

http://itp.nyu.edu/~ko373/sensors/img/diagram.jpg
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!!! STH11 by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]
to:
!!! STH11 :: Humidity and Temperature sensor by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]
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!!!!!0. Hygrometer
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!!!!0. Hygrometer
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!!!!!1.Resistive Humidity Sensors
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!!!!1.Resistive Humidity Sensors
http://itp.nyu.edu/~ko373/sensors/img/photo2.jpg
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http://itp.nyu.edu/~ko373/sensors/img/photo2.jpg
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!!!!!2, Capacitive Humidity Sensors
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!!!!2, Capacitive Humidity Sensors
http://itp.nyu.edu/~ko373/sensors/img/photo1.jpg
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http://itp.nyu.edu/~ko373/sensors/img/photo1.jpg
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!!!!3, Thermal Conductivity Humidity Sensors
http://itp.nyu.edu/~ko373/sensors/img/photo3.jpg
These sensors measure the absolute humidity by quantifying the difference between the thermal conductivity of dry air and that of air containing water vapor. In general, absolute humidity sensors provide greater resolution at temperatures >200°F than do capacitive and resistive sensors, and may be used in applications where these sensors would not survive.(such as clothes dryers and both microwave and steam-injected ovens, kilns for drying wood; machinery for drying textiles, paper, and chemical solids; pharmaceutical production; cooking; and food dehydration.)
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!!!!!2, Capacitive Humidity Sensors

Capacitive Humidity Sensors consist of a substrate on which a thin film of polymer or metal oxide is deposited between two conductive electrodes. The sensing surface is coated with a porous metal electrode to protect it from contamination and exposure to condensation.
Thin film capacitive sensors may include monolithic signal conditioning circuitry integrated onto the substrate. The most widely used signal conditioner incorporates a CMOS timer to pulse the sensor and to produce a near-linear voltage output.

http://itp.nyu.edu/~ko373/sensors/img/photo1.jpg
http://itp.nyu.edu/~ko373/sensors/img/capa.jpg
http://itp.nyu.edu/~ko373/sensors/img/fig1.gif

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!!!!!0. Hygrometer Texas1a.jpg
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!!!!!0. Hygrometer
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http://itp.nyu.edu/~ko373/sensors/img/c7m3.jpg
http://itp.nyu.edu/~ko373/sensors/img/hpr-mq01.jpg
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[[http://www.shinyei.com/sensor.htm|C7-M3 (Shinyei)]]
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[[http://www.galltec.de/products.cfm?nav=products&groupID=7|Humidity Frequency Converter and Humidity Voltage Converter (Galltec)]]
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http://itp.nyu.edu/~ko373/sensors/img/resistive.jpg
http://itp.nyu.edu/~ko373/sensors/img/fig2.gif
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Resistive humidity sensors measure the change in electrical impedance of a hygroscopic medium such as a conductive polymer, salt, or treated substrate. Resistive sensors usually consist of noble metal electrodes either deposited on a substrate by photoresist techniques or wire-wound electrodes on a plastic or glass cylinder. The substrate is coated with a salt or conductive polymer. When it is dissolved or suspended in a liquid binder it functions as a vehicle to evenly coat the sensor. Alternatively, the substrate may be treated with activating chemicals such as acid. The sensor absorbs the water vapor and ionic functional groups are dissociated, resulting in an increase in electrical conductivity.
to:
Resistive humidity sensors measure the change in electrical impedance of a hygroscopic medium such as a conductive polymer, salt, or treated substrate. Resistive sensors usually consist of noble metal electrodes either deposited on a substrate by photoresist techniques or wire-wound electrodes on a plastic or glass cylinder. The substrate is coated with a salt or conductive polymer. When it is dissolved or suspended in a liquid binder it functions as a vehicle to evenly coat the sensor. Alternatively, the substrate may be treated with activating chemicals such as acid. The sensor absorbs the water vapor and ionic functional groups are dissociated, resulting in an increase in electrical conductivity.

http://itp.nyu.edu/~ko373/sensors/img/photo2.jpg



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wonderful article from sensors magazine - [[http://www.sensorsmag.com/articles/0701/54/main.shtml|choosing a Humidity sensors]]
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* wonderful article from sensors magazine - [[http://www.sensorsmag.com/articles/0701/54/main.shtml|choosing a Humidity sensors]]
* [[ http://www.shinyei.com/allabout-e.htm|humidity basic]]
* [[http://www.sensorsportal.com/HTML/SENSORS/HumiditySens_Manufacturers.htm|Manufacturers of Humidity and Moisture Sensors]]
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!!!!!1.
to:
!!!!!1.Resistive Humidity Sensors

Resistive humidity sensors measure the change in electrical impedance of a hygroscopic medium such as a conductive polymer, salt, or treated substrate. Resistive sensors usually consist of noble metal electrodes either deposited on a substrate by photoresist techniques or wire-wound electrodes on a plastic or glass cylinder. The substrate is coated with a salt or conductive polymer. When it is dissolved or suspended in a liquid binder it functions as a vehicle to evenly coat the sensor. Alternatively, the substrate may be treated with activating chemicals such as acid. The sensor absorbs the water vapor and ionic functional groups are dissociated, resulting in an increase in electrical conductivity
.
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wonderful article from sensors magazine - [[http://www.sensorsmag.com/articles/0701/54/main.shtml|choosing a Humidity sensors]]
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wonderful article from sensors magazine - [[http://www.sensorsmag.com/articles/0701/54/main.shtml|choosing a Humidity sensors]]

!!!!!0. Hygrometer Texas1a.jpg
http://itp.nyu.edu/~ko373/sensors/img/Texas1a.jpg

!!!!!1.
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http://www.parallax.com/images/prod_gif/28018.gif
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http://itp.nyu.edu/~ko373/sensors/img/sht11_2.jpg
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[[http://www.parallax.com/dl/docs/prod/datast/shtx.pdf| Datasheet]]
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[[http://www.parallax.com/dl/docs/prod/datast/shtx.pdf| Datasheet]]

!!!!Measurering Humidity

wonderful article from sensors magazine - [[http://www.sensorsmag.com/articles/0701/54/main.shtml|choosing a Humidity sensors
]]
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!!! STH11 by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]
[[http://www.parallax.com/detail.asp?product_id=28018|From Paralax]]

http://www.parallax.com/images/prod_gif/28018.gif
[[http://www.parallax.com/dl/docs/prod/datast/shtx.pdf| Datasheet]]
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!!! STH11 by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]
[[http://www.parallax.com/detail.asp?product_id=28018|From Paralax]]

http://www.parallax.com/images/prod_gif/28018.gif
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wonderful article from sensors magazine - choosing a Humidity sensors (http://www.sensorsmag.com/articles/0701/54/main.shtml)
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http://www.parallax.com/images/prod_gif/28018.gif
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wonderful article from sensors magazine - choosing a Humidity sensors (http://www.sensorsmag.com/articles/0701/54/main.shtml)
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![[http://www.parallax.com/detail.asp?product_id=28018|From Paralax]]
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[[http://www.parallax.com/detail.asp?product_id=28018|From Paralax]]
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!!! STH11 by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]
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!!! STH11 by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]
![[http://www.parallax.com/detail.asp?product_id=28018|From Paralax
]]
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!!! STH11 by [[http://www.sensirion.com/en/02_sensors/00_products.htm?cat=3&art=1|Senserion]]