Sensebender Micro
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@bjacobse Yes and no :-)
Yes 100% is outside of the spec.
And no. 33% with Magnesium Chloride Hexahydrate is inside the spec and I get 40% instead of 33-34%.
Max off should be 3% above or? Means 37% - but fair enough. Should be ok for household use.
@nivoc said:
@bjacobse Yes and no :-)
Yes 100% is outside of the spec.
And no. 33% with Magnesium Chloride Hexahydrate is inside the spec and I get 40% instead of 33-34%.
Max off should be 3% above or? Means 37% - but fair enough. Should be ok for household use.
I hope the Temp measurements are not off by that much.
i don't need .00001 accuracy or anything. but i feel a big difference between 70 and 72 in my house. -
@nivoc said:
@bjacobse Yes and no :-)
Yes 100% is outside of the spec.
And no. 33% with Magnesium Chloride Hexahydrate is inside the spec and I get 40% instead of 33-34%.
Max off should be 3% above or? Means 37% - but fair enough. Should be ok for household use.
I hope the Temp measurements are not off by that much.
i don't need .00001 accuracy or anything. but i feel a big difference between 70 and 72 in my house. -
@bjacobse Yes and no :-)
Yes 100% is outside of the spec.
And no. 33% with Magnesium Chloride Hexahydrate is inside the spec and I get 40% instead of 33-34%.
Max off should be 3% above or? Means 37% - but fair enough. Should be ok for household use.
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@nivoc
Yes you are right, +-3 from your humidity solution on 33%, then the reading could be in the interval 33-3=30% or up to 33+3=36% and should not show 40%did you get same false readings from other sensebender humidity sensors?
@bjacobse Yes I have 3 sensbener running from 2 different orders. All 3 are very near by each other. So at 33% they all read something near to 40%.
I have 4 more sensbenders to build. However I continue to test tonight with a Boveda-Pack that claims to bring the hum in a containter to exactly 69%. I did 4 test's so far and also used different technics. So i get more and more confident.
But the very good thing is - it looks every reproducible. So the value may be off but reproducable accurate off by about 8%. When I completed my test it will be very easy to correct it within the software.
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@nivoc said:
@bjacobse Yes and no :-)
Yes 100% is outside of the spec.
And no. 33% with Magnesium Chloride Hexahydrate is inside the spec and I get 40% instead of 33-34%.
Max off should be 3% above or? Means 37% - but fair enough. Should be ok for household use.
I hope the Temp measurements are not off by that much.
i don't need .00001 accuracy or anything. but i feel a big difference between 70 and 72 in my house. -
there are some measurements in the old design thread here http://forum.mysensors.org/topic/510/minimal-design-thoughts
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Got it from http://cpc.farnell.com/1/1/57932-evatron-pp42m-case-sensor-ivory-71x71x27mm.html.
Not the cheapest, but definitely worth the money as it is very good quality. There are other colours available (white and black) https://www.jprelec.co.uk/store.asp/c=552/Gas-Sensor-Case -
@tbowmo: I have some of these too, it's nice box. i got these from tme. cheaper :)
http://www.tme.eu/fr/details/box-sens-white/boitiers-dappar-dalarme-et-de-capt/supertronic/ -
Hello @tbowmo
Doesn't the atmega328 has only 2 pins which are D2 and D3 from external interrupts ?
I am wondering why do we waste the usage of D2 since the IRQ pin is not used in the library ?@ahmedadelhosni because it is not in use by the library <yet>. Would be a shame if the library some day gets updated with support for a radio that can enter low power sleep and still wake when needed.
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What @Anticimex said.. And at the time when I created the sensebender, I didn't know that the interrupt wasn't used (I was relatively new to the project) so I thought that we had to have it connected..
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@ahmedadelhosni because it is not in use by the library <yet>. Would be a shame if the library some day gets updated with support for a radio that can enter low power sleep and still wake when needed.
@Anticimex @tbowmo This a valid point which I thought of but I needed two interrupt pins. As far as I knew from fast searching is that external interrupts which react to CHANGE in pin state are only valid for pins 2 and 3. Correct ?
Maybe there is another solution which I missed. -
And with a scalpel and a soldering iron you should be able to use both interrupts by disconnecting the one reserved for nrf24. Of course that would disable the use for rfm69 om that board.
Do you feel secure today? No? Start requiring some signatures and feel better tomorrow ;)
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And with a scalpel and a soldering iron you should be able to use both interrupts by disconnecting the one reserved for nrf24. Of course that would disable the use for rfm69 om that board.
@Anticimex Yeah I could just connect my device to the atmega pin directly as I can see/find any pin header to route the interrupt pin 2. They are all used.
Thanks guys.
