Reef Pi Build

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@Ranjib
Read this, explains alot and may help everyone.
Looks like a 3 point calibration is a dual slope, one slope from 4.0ph to 7.0 ph, and another from 7.0ph to 10.0ph, and ph 7.0 is calibrated first.

https://www.turtletough.com.au/myths-about-2-point-ph-buffer-calibration/
very interseting. thanks for sharing. I want to have this, if it helps all of us. I bet for calcium reactor usage as well as planted tanks this is fairly critical. I dont know to what precision though. But it does not matter really, at some point we'll shoot for a generic purpose titration system which will involve an accurate ph monitoring system, syringe pumps, and macros. So, we'll need a good ph measurement mechanism, one way or other.
 
ve

very interseting. thanks for sharing. I want to have this, if it helps all of us. I bet for calcium reactor usage as well as planted tanks this is fairly critical. I dont know to what precision though. But it does not matter really, at some point we'll shoot for a generic purpose titration system which will involve an accurate ph monitoring system, syringe pumps, and macros. So, we'll need a good ph measurement mechanism, one way or other.
Now that is a case for very high quality probes, pH buffered solutions, and calibrations. Like BT mentioned above, the line is broken at 7 pH, so the 4 to 7 pH slope is meaningless for a reef tank for example. But for an alkalinity titration or a freshwater planted tank, it would be absolutely crucial.
 
Now that is a case for very high quality probes, pH buffered solutions, and calibrations. Like BT mentioned above, the line is broken at 7 pH, so the 4 to 7 pH slope is meaningless for a reef tank for example. But for an alkalinity titration or a freshwater planted tank, it would be absolutely crucial.
So Diamond1 will be the alkaline guinea pig, and ill be the acidic guinea pig!
 
I love that this project has freshwater aquaria interest and applications. It is fun to think about, and one day I would like to have a planted tank again.
A good planted tank can be fun to do. My current tank is soft water, acidic. My tank before I moved was hard water, 8.0 ph, livebearers and all the plants in it were collected from the Allegheny River right in my backyard.(hard water to match my tank) Was a fun tank, had so many fish breeding in there, the grandkids loved it.
20150817_163159.jpg
 
A good planted tank can be fun to do. My current tank is soft water, acidic. My tank before I moved was hard water, 8.0 ph, livebearers and all the plants in it were collected from the Allegheny River right in my backyard.(hard water to match my tank) Was a fun tank, had so many fish breeding in there, the grandkids loved it.
20150817_163159.jpg
I like your tank @Bigtrout . I have always wanted to try an Avatar inspired floating rock tank with water falls, just don't have the time for another hobby right now.
Something like this is just way cool,
 
A planted tank underwater isn't the only one interested here. I am looking to build a version of the Reef-Pi for my 130g reef tank turned dart frog vivarium. Many requirements for monitoring and control are the same, with some minor exceptions. For example, humidity and ambient air temp are critical factors with dart frogs. Changing temperature between night and day is less important, but still desirable. Not sure yet how to address that one. Digital Aquatics was selling the Herpkeeper up until they went out of business, so now there isn't a suitable replacement. Just shows how far reaching the Reef-Pi project can be!
 
A planted tank underwater isn't the only one interested here. I am looking to build a version of the Reef-Pi for my 130g reef tank turned dart frog vivarium. Many requirements for monitoring and control are the same, with some minor exceptions. For example, humidity and ambient air temp are critical factors with dart frogs. Changing temperature between night and day is less important, but still desirable. Not sure yet how to address that one. Digital Aquatics was selling the Herpkeeper up until they went out of business, so now there isn't a suitable replacement. Just shows how far reaching the Reef-Pi project can be!

I2C humidity sensors are pretty amazing these days, so shouldn't be hard to add this functionality to ReefPi at least for a monitoring perspective. Might be also beneficial for those that run exhaust fans :)
 
OK so I had my first major issue with reef-pi. My ATO has been working great and doing it's job keeping my water level where it needs to be. Last night the power went off for about an hour and when reef-pi restarted the ATO ran until the ato container was empty dumping about 1 1/2 gallon of water into the system.
I just noticed it when I went this morning to fill my ATO and saw the pump was still running and the container was empty. Not a huge deal as it only changed my salinity from 1.026 to 1.025 and the pump didn't burn up.
I'm just glad it didn't happen when the reservoir was full. So after a water change with some strong salt mix I got my salinity back to where it needs to be.

I did some testing on the sensor to check that it was working properly and found that when I put the sensor in water the outlet controlling the pump is staying on no matter if the sensor is in or out of the water.
Could it be the sensor got damaged with the power going off? Or maybe something in the software?
I seem to remember reading somewhere that there was an issue with these sensors not responding correctly if reef pi starts and the sensors are submerged but I can't find the post now in the mega thread.

@Ranjib any ideas?
 
OK so I had my first major issue with reef-pi. My ATO has been working great and doing it's job keeping my water level where it needs to be. Last night the power went off for about an hour and when reef-pi restarted the ATO ran until the ato container was empty dumping about 1 1/2 gallon of water into the system.
I just noticed it when I went this morning to fill my ATO and saw the pump was still running and the container was empty. Not a huge deal as it only changed my salinity from 1.026 to 1.025 and the pump didn't burn up.
I'm just glad it didn't happen when the reservoir was full. So after a water change with some strong salt mix I got my salinity back to where it needs to be.

I did some testing on the sensor to check that it was working properly and found that when I put the sensor in water the outlet controlling the pump is staying on no matter if the sensor is in or out of the water.
Could it be the sensor got damaged with the power going off? Or maybe something in the software?
I seem to remember reading somewhere that there was an issue with these sensors not responding correctly if reef pi starts and the sensors are submerged but I can't find the post now in the mega thread.

@Ranjib any ideas?

So, whenever I power down my reef-pi, my ato pump turns on as well, but only for about 5 seconds. I don't have the pump tied to a sensor yet, as I can't get the optical sensor, or the float sensor to work off of the revD board yet. Something about the pi losing power is causing the ADJ strip to fail closed on at least that circuit.
 
OK so I had my first major issue with reef-pi. My ATO has been working great and doing it's job keeping my water level where it needs to be. Last night the power went off for about an hour and when reef-pi restarted the ATO ran until the ato container was empty dumping about 1 1/2 gallon of water into the system.
I just noticed it when I went this morning to fill my ATO and saw the pump was still running and the container was empty. Not a huge deal as it only changed my salinity from 1.026 to 1.025 and the pump didn't burn up.
I'm just glad it didn't happen when the reservoir was full. So after a water change with some strong salt mix I got my salinity back to where it needs to be.

I did some testing on the sensor to check that it was working properly and found that when I put the sensor in water the outlet controlling the pump is staying on no matter if the sensor is in or out of the water.
Could it be the sensor got damaged with the power going off? Or maybe something in the software?
I seem to remember reading somewhere that there was an issue with these sensors not responding correctly if reef pi starts and the sensors are submerged but I can't find the post now in the mega thread.

@Ranjib any ideas?
Sorry for the trouble :-(. I can’t recall anything specific for ato sensor going bad upon reboot. I’ll suggest setting up alerts for ato. I am thinking of introducing a safety mechanism where ato will be locked once alert is triggered (based on usage ).
 
Sorry for the trouble :-(. I can’t recall anything specific for ato sensor going bad upon reboot. I’ll suggest setting up alerts for ato. I am thinking of introducing a safety mechanism where ato will be locked once alert is triggered (based on usage ).
No worry on the troubles it's all part of making this thing work as good as it can. That's one of the things I still need to do is set up alerts. I will be doing some investigating into things this weekend when I take reef-pi off line to add the ph board.
 
So, whenever I power down my reef-pi, my ato pump turns on as well, but only for about 5 seconds. I don't have the pump tied to a sensor yet, as I can't get the optical sensor, or the float sensor to work off of the revD board yet. Something about the pi losing power is causing the ADJ strip to fail closed on at least that circuit.
This type of issues are of highest priority for me. I have not tested the baseboard ato yet, did you check theatrus post with float switch wired? I’ll try to reproduce this. I am thinking if reef-pi is turning on ato pump because water level is off (return is off??) or because the sensor has lost power and reef-pi is treating that as water level off .
 
Sorry for the trouble :-(. I can’t recall anything specific for ato sensor going bad upon reboot. I’ll suggest setting up alerts for ato. I am thinking of introducing a safety mechanism where ato will be locked once alert is triggered (based on usage ).
The locking on alert would be great fail safe for ATO.
 
This type of issues are of highest priority for me. I have not tested the baseboard ato yet, did you check theatrus post with float switch wired? I’ll try to reproduce this. I am thinking if reef-pi is turning on ato pump because water level is off (return is off??) or because the sensor has lost power and reef-pi is treating that as water level off .

I have wired in the float switch as @theatrus has described, and it reacts the same way the optical sensor does. I have an unoccupied plug on the ADJ strip that I have programmed into the ATO, and a separate plug that the actual ATO pump is plugged into. Until I was able to get a successful test out of the ATO sensors, I was manually topping off using the power switch for the ATO pump in the UI. I have it on pin 16 in the connectors tab. It's very interesting, but not insurmountable. This is part of the beta tester experience, so it's no big deal. I will have to check voltage on the wires on the float switch again, once I'm off of work.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%
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