Comments on: Parts: Precision humidity and temperature sensor (SHT1x/7x) http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/ Fresh hacks every day Mon, 23 Nov 2009 07:13:40 +0000 http://wordpress.com/ hourly 1 By: chris http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-62675 chris Thu, 12 Feb 2009 02:01:05 +0000 http://hackaday.com/?p=7279#comment-62675 see GE's ChipCap sensor avaliable with digital and linear outputs http://www.gesensing.com/products/chipcap.htm??bc=bc_ps+bc_tech_hum see GE’s ChipCap sensor avaliable with digital and linear outputs http://www.gesensing.com/products/chipcap.htm??bc=bc_ps+bc_tech_hum

]]> By: satan http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57780 satan Sat, 03 Jan 2009 15:32:05 +0000 http://hackaday.com/?p=7279#comment-57780 Works great with arduino. But can anyone explain how to use two at once so you can compare two values? Works great with arduino. But can anyone explain how to use two at once so you can compare two values?

]]> By: yosh http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57385 yosh Wed, 31 Dec 2008 10:36:08 +0000 http://hackaday.com/?p=7279#comment-57385 You can get these for free @ the manufacturers website ;) You can get these for free @ the manufacturers website ;)

]]> By: pelaca http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57298 pelaca Tue, 30 Dec 2008 20:35:57 +0000 http://hackaday.com/?p=7279#comment-57298 “I’ve tried these once, the serial communication is fucked up, the protocol has trouble with the arduino software. The second start conflicts with the way the arduino software works.” Maybe you've to try it twice. Or learn a little bit more. On the follow link you can download the scketch at http://www.ragingreality.com/~wprasek/serial_temp_humidity.pde “I’ve tried these once, the serial communication is fucked up, the protocol has trouble with the arduino software.

The second start conflicts with the way the arduino software works.”

Maybe you’ve to try it twice. Or learn a little bit more.
On the follow link you can download the scketch at
http://www.ragingreality.com/~wprasek/serial_temp_humidity.pde

]]> By: ferdinand http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57261 ferdinand Tue, 30 Dec 2008 16:11:38 +0000 http://hackaday.com/?p=7279#comment-57261 if you're looking for the sht10 you can get them from nuelectronics.com for ~$12. they also supply a sketch for duinos which looks very well commented to me. if you’re looking for the sht10 you can get them from nuelectronics.com for ~$12. they also supply a sketch for duinos which looks very well commented to me.

]]> By: tohoq http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57244 tohoq Tue, 30 Dec 2008 14:11:32 +0000 http://hackaday.com/?p=7279#comment-57244 I've worked with these sensors before. They're quite neat. The best thing is the need for few external components and the small size, which allows you to make a very small sensor unit. One thing about the pic in the article: the capacitor, which is meant for filtering high frequencies in the power supply looks more like a loop antenna than a filter. "I’ve tried these once, the serial communication is fucked up, the protocol has trouble with the arduino software. The second start conflicts with the way the arduino software works." The serial communication in the sensor is "almost i2c", therefore incompatible with i2c. You will have to write the communication yourself from the lowest level. Having never worked with Arduino, but having worked with several Atmel µCs I'd say it isn't difficult at all. If something was fucked up when you tried the sensor, it was probably the Arduino or its user. I’ve worked with these sensors before. They’re quite neat. The best thing is the need for few external components and the small size, which allows you to make a very small sensor unit.

One thing about the pic in the article: the capacitor, which is meant for filtering high frequencies in the power supply looks more like a loop antenna than a filter.

“I’ve tried these once, the serial communication is fucked up, the protocol has trouble with the arduino software.

The second start conflicts with the way the arduino software works.”

The serial communication in the sensor is “almost i2c”, therefore incompatible with i2c. You will have to write the communication yourself from the lowest level. Having never worked with Arduino, but having worked with several Atmel µCs I’d say it isn’t difficult at all. If something was fucked up when you tried the sensor, it was probably the Arduino or its user.

]]> By: johnb http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57242 johnb Tue, 30 Dec 2008 13:57:00 +0000 http://hackaday.com/?p=7279#comment-57242 The Honeywell HIH isn't *that* hard to interface to if you do it using a Dallas DS2438 one-wire chip. The 2438 datasheet has an example of doing this. I've been using it for a couple years for remote sensing (it can do temp, humidity, and solar intensity with a single chip) and it's done very well. Nevertheless, this is a very cool project and it'll be fun to give it a try. The Honeywell HIH isn’t *that* hard to interface to if you do it using a Dallas DS2438 one-wire chip. The 2438 datasheet has an example of doing this. I’ve been using it for a couple years for remote sensing (it can do temp, humidity, and solar intensity with a single chip) and it’s done very well. Nevertheless, this is a very cool project and it’ll be fun to give it a try.

]]> By: Dan Fekete http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57227 Dan Fekete Tue, 30 Dec 2008 11:37:39 +0000 http://hackaday.com/?p=7279#comment-57227 These sensors are the sht! sorry, couldn't resist... Thanks for these posts, keep 'em coming. My vote is for Load Cells and an AD7705 for the next one ;-) These sensors are the sht!

sorry, couldn’t resist…

Thanks for these posts, keep ‘em coming. My vote is for Load Cells and an AD7705 for the next one ;-)

]]> By: pelaca http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57220 pelaca Tue, 30 Dec 2008 10:47:27 +0000 http://hackaday.com/?p=7279#comment-57220 I'm using one of this to read the temperature and humidity on a arduino to calculate the dew point on a paper dryer. Works like a charm. You can put a led an resistor on the clock signal to see if the shtxxx is working. I’m using one of this to read the temperature and humidity on a arduino to calculate the dew point on a paper dryer. Works like a charm.
You can put a led an resistor on the clock signal to see if the shtxxx is working.

]]> By: Pat http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57214 Pat Tue, 30 Dec 2008 09:49:29 +0000 http://hackaday.com/?p=7279#comment-57214 the scp1000-d01 is way expensive ($25 in 100+ quantity from digikey - typically $50 in a breakout from sparkfun). yah, MEMS, 17-bit resolution, whatever, that's nice. the HP03D, available from futurlec for $9.90 (on a breakout board already), has good enough resolution/accuracy (10/50 Pa) for most weather applications, and it's an I2C interface. the scp1000's a great chip if you absolutely need high accuracy (e.g. an altimeter). but if you don't need ~10 Pa accuracy, the HP03D's a great bet. the HP02D's half the price of the HP03D if you don't need high accuracy. the scp1000-d01 is way expensive ($25 in 100+ quantity from digikey – typically $50 in a breakout from sparkfun). yah, MEMS, 17-bit resolution, whatever, that’s nice. the HP03D, available from futurlec for $9.90 (on a breakout board already), has good enough resolution/accuracy (10/50 Pa) for most weather applications, and it’s an I2C interface.

the scp1000’s a great chip if you absolutely need high accuracy (e.g. an altimeter). but if you don’t need ~10 Pa accuracy, the HP03D’s a great bet. the HP02D’s half the price of the HP03D if you don’t need high accuracy.

]]> By: andrew http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57188 andrew Tue, 30 Dec 2008 03:12:32 +0000 http://hackaday.com/?p=7279#comment-57188 i third that; i like discovering new parts that i wouldn't otherwise know about. i third that; i like discovering new parts that i wouldn’t otherwise know about.

]]> By: hugh http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57183 hugh Tue, 30 Dec 2008 01:59:15 +0000 http://hackaday.com/?p=7279#comment-57183 I, too, love these parts posts, they are extremely useful, especially this one, because I have been looking for a part pretty much exactly like this one. I, too, love these parts posts, they are extremely useful, especially this one, because I have been looking for a part pretty much exactly like this one.

]]> By: Marcus http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57151 Marcus Mon, 29 Dec 2008 22:12:55 +0000 http://hackaday.com/?p=7279#comment-57151 Love your parts post. This is marvelous again. More on nice parts, like this. Complex sensors in easy interface - great! Love your parts post. This is marvelous again. More on nice parts, like this. Complex sensors in easy interface – great!

]]> By: scotty http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57148 scotty Mon, 29 Dec 2008 21:35:11 +0000 http://hackaday.com/?p=7279#comment-57148 Excellent writeup. Cuts my time hacking in half for this device! Thank you. Selfishly suggest the SCP1000-D01 next for Barometric Pressure. SPI. Excellent writeup. Cuts my time hacking in half for this device! Thank you.

Selfishly suggest the SCP1000-D01 next for Barometric Pressure. SPI.

]]> By: chris http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/comment-page-1/#comment-57147 chris Mon, 29 Dec 2008 21:26:56 +0000 http://hackaday.com/?p=7279#comment-57147 no arduino's here. no arduino’s here.

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