Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
09-02-2016, 09:48 AM
(This post was last modified: 09-02-2016, 09:52 AM by Arne.)
Hi,
Lots of people use one or two fans to get rid of the moisture (humidity) inside the kabinet where the sump is located.
I know Robo-Tank displays the humidity but after a thorough search it looks like it's nothing more than a display...
A controller controlls... ;-)
I expected the humidity sensor could be used to controll my kabinet fans.
What good is a humidity value when you cannot do anything with it?
Something for the future also?
Kind regards,
Arne.
Posts: 3,250
Threads: 90
Likes Received:
163 in 120 posts
Likes Received:
163 in 120 posts
Reputation:
184
Joined: Sep 2015
Country:
Hi Arne, never thought of doing that, it's hasn't been brought up. Didn't think anyone would care about humidity. The sensor was added for monitoring the room. I will add it to the list. For what's its worth that the only data you can't do anything with.
Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
Thanks Rob.
It's not always that easy to come up with all the needs people might have... ;-)
I think the temp/humidity sensor for monitoring the room is a great feature though so I would keep that.
In case of a reefer/saltwater aquarium, the sump located inside a kabinet (26 deg) produces a lot of humidity.
So an extra humidity sensor with controls and (PWM) output would be a great idea to add.
This brings me to this question, and someone else also came up with this: might 2 different software versions be an idea?
I mean, there are quite some differences between a frehwater tank and a reefer/salt water tank...
I.e. amount of dosing pumps, water values (sensors)...
I think Robo-Tank was developped from the fresh water point of view, wasn't it?
Kind regards,
Arne.
Posts: 3,250
Threads: 90
Likes Received:
163 in 120 posts
Likes Received:
163 in 120 posts
Reputation:
184
Joined: Sep 2015
Country:
Yeah to much to think of. One day I might have two versions of the software but its hard enough updating one version. Yeah the controller was for freshwater as that's what I have, lately I've been trying to swing it to saltwater tanks as well. Soon it will get there.
Posts: 355
Threads: 8
Likes Received:
12 in 12 posts
Likes Received:
12 in 12 posts
Reputation:
13
Joined: Dec 2015
Country:
well not to bring you down, but the sensor used by robo-tank is not accurate enough to be used for humidity control.
I'll have to dig into instuctables but there are better ones around that do the job more accurately.
Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
09-05-2016, 03:30 AM
(This post was last modified: 09-05-2016, 03:49 AM by Arne.)
Hi Fietsenrex,
Well, thanks for cheering me up... ;-)
Just kidding!
I will have a look at the sensor Rob used.
I'll have to make a temporary(?) solution anyway.
Checked it but the accuracy of the DHT22/AM2302 is more than enough.
Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
I can live with +- 2%... ;-)
In this case the repeatability is more important to me.
Posts: 3,250
Threads: 90
Likes Received:
163 in 120 posts
Likes Received:
163 in 120 posts
Reputation:
184
Joined: Sep 2015
Country:
Repeatability is +-1% but I've never seen it jump around.
Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
09-05-2016, 10:42 AM
(This post was last modified: 09-05-2016, 10:42 AM by Arne.)
Yeah, I saw it on the datasheet.
That's good enough for me Rob !
Posts: 3,250
Threads: 90
Likes Received:
163 in 120 posts
Likes Received:
163 in 120 posts
Reputation:
184
Joined: Sep 2015
Country:
If there is one better I might add it so people have can choose. One day I want to add a better temperature sensor as an option as well.
Posts: 355
Threads: 8
Likes Received:
12 in 12 posts
Likes Received:
12 in 12 posts
Reputation:
13
Joined: Dec 2015
Country:
cannot find it anymore...
there was a guy on instructables who had build a humidity control system for his attic (or some place) and he claimed that the DHT22 was not accurate enough to do the job properly
since there was a need for 2 accurate sensors to do the job the 5% was to much on each sensor.
but if you only use one sensor to just start a fan when the humidity gets above a set value you could get away with it, just get the hysteresis to overlap the accuracy and you're set, otherwise there is a possibility it switches on and off the whole time
Posts: 3,250
Threads: 90
Likes Received:
163 in 120 posts
Likes Received:
163 in 120 posts
Reputation:
184
Joined: Sep 2015
Country:
Humidity must have been important to him, the sensor seems pretty stable to me. I don't have another style humidity sensor to see the difference but I've yet to see two that match. :) That's why they don't power them up at stores, they would all be different haha...
Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
Rob,
This sensor would be good enough to use it for a fan control to ged rid of humidity in the sump cabinet.
Posts: 3,250
Threads: 90
Likes Received:
163 in 120 posts
Likes Received:
163 in 120 posts
Reputation:
184
Joined: Sep 2015
Country:
That's good, for the time being you can setup an outlet to turn on/off 4 times during the day to get rid of the build up.
Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
Yeah, I can do that Rob.
Good to hear you say "for the time being..." ... ;-))
Posts: 355
Threads: 8
Likes Received:
12 in 12 posts
Likes Received:
12 in 12 posts
Reputation:
13
Joined: Dec 2015
Country:
I now understand why you need humidity control when running a sump...
Mold everywhere....
Going to set up some fans on a schedule to control it more or less..
Posts: 260
Threads: 37
Likes Received:
0 in 0 posts
Likes Received:
0 in 0 posts
Reputation:
1
Joined: Jul 2016
Country:
09-17-2016, 07:03 AM
(This post was last modified: 09-17-2016, 07:21 AM by Arne.)
I told you... ;-)
Just kidding !
I think a humidity sensor to mount inside the sump cabinet would be a great feature...
Posts: 355
Threads: 8
Likes Received:
12 in 12 posts
Likes Received:
12 in 12 posts
Reputation:
13
Joined: Dec 2015
Country:
That is the exact location where mine is.
But an additional one for the canopy or some place else would be nice
