reef-pi :: An opensource reef tank controller based on Raspberry Pi.

MikeSpike

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Hi I would like to measure the water level in a tank using my reef pi. (That is the actual water level not just the level is low with a traditional optical sensor)

Have come across the ‘etape liquid level sensor’ (google it). It says it works the same way as a thermistor. Could I define it as a thermometer to report water level (or any other way within reef pi? Thank you
 
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Ranjib

Ranjib

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Hi I would like to measure the water level in a tank using my reef pi. (That is the actual water level not just the level is low with a traditional optical sensor)

Have come across the ‘etape liquid level sensor’ (google it). It says it works the same way as a thermistor. Could I define it as a thermometer to report water level (or any other way within reef pi? Thank you
long back (pre 1.0) reef-pi used to support etapes (reef-pi used to be called as reefer during that time). I dropped its support due to lack of usecases and the complexity in wiring (SPI involves more wire), in favor of photoelectric sensor and float switches.
Now that we have HAL (hardware abstraction layer), it wont be hard to bring back support for etapes, but I have to sort out the usecases.
 

MikeSpike

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long back (pre 1.0) reef-pi used to support etapes (reef-pi used to be called as reefer during that time). I dropped its support due to lack of usecases and the complexity in wiring (SPI involves more wire), in favor of photoelectric sensor and float switches.
Now that we have HAL (hardware abstraction layer), it wont be hard to bring back support for etapes, but I have to sort out the usecases.
Thanks for the swift response. Any eta on when you think this might be added?
 

Michael Lane

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Hi I would like to measure the water level in a tank using my reef pi. (That is the actual water level not just the level is low with a traditional optical sensor)

Have come across the ‘etape liquid level sensor’ (google it). It says it works the same way as a thermistor. Could I define it as a thermometer to report water level (or any other way within reef pi? Thank you
Another common technique is to measure the weight of the reservoir and calculate the level or volume from the weight. reef-pi doesn't support load cell weight sensors yet, but the driver system with v3.0 will make this much easier.
 
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Ranjib

Ranjib

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Thanks for the swift response. Any eta on when you think this might be added?
I have no plan for it right now. As I was saying I want to understand how I’ll be using this to solve a specific problem related to reef keeping or any aquarium setup in general. Those bits are essential to understand what other pieces needed and if there exist alternate techniques
 

MikeSpike

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I have no plan for it right now. As I was saying I want to understand how I’ll be using this to solve a specific problem related to reef keeping or any aquarium setup in general. Those bits are essential to understand what other pieces needed and if there exist alternate techniques
Some possible uses
1. Measuring how much water is let in R.O. rather than just 'Refill'
2. Using Reefpi to automate water changes in a more dynamic way e.g. 10l or 20l rather than at a set point of the infrared sensor
 

Mad_Deuce

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Hi Ranjib it is possible if you can tell know how much current does the kessil A80 0-10v draw per channel? I figure must be slow low 50ma ish per channel?

I'm calculating to see if my sinking output can handle the job or not. I'm using an automation hat there 3x 24v sinking output on board but can only handle 500ma combine. I already got one of the output slotted out to run 2x 12v fan at 150ma each. So not much amp left to share.
 
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Ranjib

Ranjib

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Hi Ranjib it is possible if you can tell know how much current does the kessil A80 0-10v draw per channel? I figure must be slow low 50ma ish per channel?

I'm calculating to see if my sinking output can handle the job or not. I'm using an automation hat there 3x 24v sinking output on board but can only handle 500ma combine. I already got one of the output slotted out to run 2x 12v fan at 150ma each. So not much amp left to share.
under 40ma, but use common npn transistors (2n222a ) to gate the pi or pca9685 pwm output
 
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Ranjib

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Some possible uses
1. Measuring how much water is let in R.O. rather than just 'Refill'
2. Using Reefpi to automate water changes in a more dynamic way e.g. 10l or 20l rather than at a set point of the infrared sensor
This first use case is incomplete, like what to do after you know the level .. the second use case can be done using peristaltic pumps, folks already does this and without using any water level sensor, as we need to only add /remove fixed amount of water for this.
 
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Ranjib

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Just finished a pi3 all in one build with 3d printed enclosure .
4850B606-FFED-4003-9293-D3DD287D4BAC.jpeg


This one can do one temp sensor, one float switch , one kessil and one ph probe .

4863B399-0005-4374-A791-DFBB5ABA8925.jpeg


Similar to the last all in one build (I’m upgrading my builds to use 3d printed enclosures) this one has space for accessing pi 3 usb and hdmi ports
32EF6932-22F3-456E-A467-E06ACEC45809.jpeg


A685CB7D-5A15-4C62-BF55-07FCC2CCAD78.jpeg


The electronics is very similar to other all in one build except it does not have the adj powerstrip control circuit involving 12v and uln2893a.
1AEE4C6D-2F7E-40D6-8F39-0223CAB76834.jpeg


Overall pretty happy with the result . I used 3mm walls for this build , which made it pretty sturdy .
Here are both of my 3dprinted builds
71D0F9F5-2861-4D8D-9F4F-DA9B35CBF48B.jpeg



Now back to 3.0 feature development ..:)
 

AbjectMaelstroM

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Just finished a pi3 all in one build with 3d printed enclosure .
4850B606-FFED-4003-9293-D3DD287D4BAC.jpeg


This one can do one temp sensor, one float switch , one kessil and one ph probe .

4863B399-0005-4374-A791-DFBB5ABA8925.jpeg


Similar to the last all in one build (I’m upgrading my builds to use 3d printed enclosures) this one has space for accessing pi 3 usb and hdmi ports
32EF6932-22F3-456E-A467-E06ACEC45809.jpeg


A685CB7D-5A15-4C62-BF55-07FCC2CCAD78.jpeg


The electronics is very similar to other all in one build except it does not have the adj powerstrip control circuit involving 12v and uln2893a.
1AEE4C6D-2F7E-40D6-8F39-0223CAB76834.jpeg


Overall pretty happy with the result . I used 3mm walls for this build , which made it pretty sturdy .
Here are both of my 3dprinted builds
71D0F9F5-2861-4D8D-9F4F-DA9B35CBF48B.jpeg



Now back to 3.0 feature development ..:)
Lookin good!

I want a 3D printer.
 

Bigtrout

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Just finished a pi3 all in one build with 3d printed enclosure .
4850B606-FFED-4003-9293-D3DD287D4BAC.jpeg


This one can do one temp sensor, one float switch , one kessil and one ph probe .

4863B399-0005-4374-A791-DFBB5ABA8925.jpeg


Similar to the last all in one build (I’m upgrading my builds to use 3d printed enclosures) this one has space for accessing pi 3 usb and hdmi ports
32EF6932-22F3-456E-A467-E06ACEC45809.jpeg


A685CB7D-5A15-4C62-BF55-07FCC2CCAD78.jpeg


The electronics is very similar to other all in one build except it does not have the adj powerstrip control circuit involving 12v and uln2893a.
1AEE4C6D-2F7E-40D6-8F39-0223CAB76834.jpeg


Overall pretty happy with the result . I used 3mm walls for this build , which made it pretty sturdy .
Here are both of my 3dprinted builds
71D0F9F5-2861-4D8D-9F4F-DA9B35CBF48B.jpeg



Now back to 3.0 feature development ..:)
Very nice...send me one...lol!
 

Alaa

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Hi all
Quick question
Can i use pi roi and pca board on the same time ine to control lights and the other fot doser if so do i connect both pca board and the motor board to same raspberry pi pins
Thanks for all your support
 
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