I haven't checked the sensor specs as far as sensing - I'll let you read the datasheet and meet your application-specific requirements. As far as compatibility with the IOIO, the DHT22 is not (easily) compatible, the Sensirion lists most of the sensors of this family as having an I2C interface (compatible with the IOIO), as well as the TI sensor and all the Honeywell ones (either I2C or SPI should work).
On Tue, Feb 24, 2015 at 11:35 AM, pogono <sarpa...@gmail.com> wrote: > hello, > > I just need to connect humidity & temperature sensor to ioio for logging > purpose. I could not decide which sensor I should select because of my poor > knowledge of electronics. Your shares are a very valuable source for me, > thank you bourdonnais. > > I searched & read in forum that Ytai says "in general, if you use I2C, SPI > or analog interface sensors you should be good. 1-wire is not currently > supported." > > Today, actually I searched and noted which sensors I guess can use: (in > the order of cost) > DHT22 - https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf > (already has a box and mentioned to support up to 20m cable) Which type > output does this have from above Ytai definition? > Sensirion - http://www.sensirion.com/en/products/humidity-temperature/ > Honeywell HumidIcon - > http://sensing.honeywell.com/honeywell-sensing-humidicon-nomenclature-009078-2-en.pdf > > Texas Instruments HDC100x - > > My aim is to have nonstop continuous logging of a sensor that connected to > ioio via cable which will be used in close area with roughly range of temp: > -20 to 80 C & humidity: 5 to 95%. I would be appreciated if you comment any > suggestion to select a sensor for my purpose. > > Thanks in advance, > > 23 Şubat 2015 Pazartesi 15:38:29 UTC+2 tarihinde bourdonnais yazdı: >> >> Hello, >> >> I wanted to share an update. >> >> My ioio system has been somewhat *in production* for 3 weeks. >> >> I did apply a correction to the values read by tmp102 sensor yesterday. >> I currently run with -3.5° celsius correction to get a credible value. >> >> I expect the cause to be somehow hardware related (a slow creep, a >> variable error) >> >> Maybe the very variable humidity (between 30% and 70%, temp between 5°c >> and 20°c) is the cause of the readings I get. >> >> I have now two more ioio boards to discover the origin of that gremlin. >> As the ioiothingy is a temperature controlling magic wand, temp reading >> accuracy is somehow... vital. >> >> I will wire tmp102 & MCP9008, and maybe a couple of other sensors >> (combined humidity & temperature) as a "lab". >> And I'll hook a dht22 on an arduino too. >> >> >> >> On Sun, Jan 25, 2015 at 11:46 PM, Ytai Ben-Tsvi <yta...@gmail.com> wrote: >> >>> Doesn't seem like you're checking the return value of writeRead(). Any >>> chance it is returning false? If so, common problems are bad connections >>> (loose), wrong pins, forgetting pull-ups, forgetting common ground, not >>> configuring the TMP102 address correctly, using the wrong address from code. >>> For debugging I would encourage you to Log.d(...) your readings to get >>> GUI-related problems out of the possible things that can go wrong. >>> >>> On Thu, Jan 22, 2015 at 3:35 PM, Javier Soriano <javi...@gmail.com> >>> wrote: >>> >>>> Hi Ytai, >>>> >>>> I'm working now in this project. I have read all the examples that >>>> other users and you post here and I tried to implement it. However, I don't >>>> know why the app doesn't show the temperature. I append the >>>> MainActivity.java in this message. >>>> >>>> Thanks in advance!! >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "ioio-users" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to ioio-users+...@googlegroups.com. >>>> To post to this group, send email to ioio-...@googlegroups.com. >>>> Visit this group at http://groups.google.com/group/ioio-users. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "ioio-users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to ioio-users+...@googlegroups.com. >>> To post to this group, send email to ioio-...@googlegroups.com. >>> Visit this group at http://groups.google.com/group/ioio-users. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > You received this message because you are subscribed to the Google Groups > "ioio-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to ioio-users+unsubscr...@googlegroups.com. > To post to this group, send email to ioio-users@googlegroups.com. > Visit this group at http://groups.google.com/group/ioio-users. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to ioio-users+unsubscr...@googlegroups.com. To post to this group, send email to ioio-users@googlegroups.com. Visit this group at http://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
