Reef Pi PH Probe Help

[Lokilow]

Hey guys,

Im back asking for more help. So I have a reef pi setup currently with a PWM controller controlling two lights for my fresh water setup. I want to add a PH probe to my setup.

I bought the Atlas PH probe circuit- https://atlas-scientific.com/embedded-solutions/ezo-ph-circuit/
Atlas Mini-PH Probe- https://atlas-scientific.com/probes/mini-ph-probe/
And Atlas Carrier Board- https://atlas-scientific.com/carrier-boards/electrically-isolated-ezo-carrier-board-gen-2/

I have followed the outdated guide- https://learn.adafruit.com/reef-pi-guide-7-ph-monitoring?view=all

So here is the issues im running into. I can not get the raspberry pi to see the sensor. I have it connected in parallel to my PWM controller and trying to read it using I2C. It will see the PWM IF i have the PH disconnected. If Both are connected the Pi wont see either or itll only see address 40 of the PWM controller.

Once I was able to get it to see both sensors via I2C. So I then tried to follow the guide and set the sensor up on Reef Pi i run into my next issue. When I go to the PH tab and click the plus button, the Analog Input drop down shows nothing. Do i need to create a driver like I did with the PWM controller?

I have also tried wiring it up as TX to Tx and Rx to Rx, as well as TX-Rx and Rx-Tx. Once again the Analog input doesnt show anything.

What am I missing?

Thanks!

 

[NXE]

Hi there, you will need to add a driver for the pH board that you have. @robsworld78 has a good user manual for setting up reef-pi which covers this: https://docs.google.com/document/d/1uFP4NfZ3-OAwox8C0ugJvecOuEv3tKm3/edit#heading=h.35nkun2

 

[Lokilow]

Hi there, you will need to add a driver for the pH board that you have. @robsworld78 has a good user manual for setting up reef-pi which covers this: https://docs.google.com/document/d/1uFP4NfZ3-OAwox8C0ugJvecOuEv3tKm3/edit#heading=h.35nkun2

Thanks!

Does this also mean it should be connected in parallel on the I2C pins and not use the TX/RX pins?

 

[robsworld78]

Thanks!

Does this also mean it should be connected in parallel on the I2C pins and not use the TX/RX pins?

Yeah you need to connect to I2C pins on Pi, SCL/SDA.

You also need to put that circuit in I2C mode, it's explained here.

HOW TO CHANGE DATA PROTOCOL OF ATLAS SENSORS

HOW TO CHANGE DATA PROTOCOL OF ATLAS SENSORS: Atlas Scientific's line of EZO circuits has two data protocols, UART and I2C. The circuits are in UART mode by default. But what happens if your application requires I2C? Or maybe the circuits are already in I2C, and you would like to revert to UART…

www.instructables.com

 

[Lokilow]

Edit: got the board switch to I2C Blue LED and I see it in the I2Cdetect as pin 63, does that seem correct?

When i then setup the driver Ph_ezo to pin 63 and set an analog connector to use said driver and channel 0, and setup the PH page i get nothing as an output.

The reason I dont think its pin 40 or 70 is because those are what my PWM driver show up as. Disconnecting those makes both those numbers disappear.
I have even gone back to the drivers tab and set the ph driver address to 99 as shown in the robo-tank guide.

Thanks for all the help guys, im trying to piece all this different information together and it really helps having you all guide me in the right direction.

 

[robsworld78]

Looks like your close, 63 is the pH but that's hex 0x63 so it needs to be converted to decimal which is 99. After you changed it you need to go to the "admin" tab and press the "reload" button so reef-pi can update, I think just that will get it working. Connector sounds right, if it still doesn't work delete the pH from pH tab, then delete the connector, then delete the driver. The go to Admin -> press reload, and add things back in order.

 

[Lokilow]

Looks like your close, 63 is the pH but that's hex 0x63 so it needs to be converted to decimal which is 99. After you changed it you need to go to the "admin" tab and press the "reload" button so reef-pi can update, I think just that will get it working. Connector sounds right, if it still doesn't work delete the pH from pH tab, then delete the connector, then delete the driver. The go to Admin -> press reload, and add things back in order.

Yes that worked! All I had to do was reload as you suggested. Now time to setup email alerts.

Thanks for the help!

 

[Lokilow]

Ok another bump.

I seem to have trouble getting my ph probe calibrated. Whatever ph i use, 6.86, 9, etc the calibration doesn't change what the probe is showing.

I do know the probe is working as it changes with each ph reading, just always 2 points low.

 

[robsworld78]

Ok another bump.

I seem to have trouble getting my ph probe calibrated. Whatever ph i use, 6.86, 9, etc the calibration doesn't change what the probe is showing.

I do know the probe is working as it changes with each ph reading, just always 2 points low.

Maybe it's a misunderstanding, the value you see when you calibrate is only the raw uncalibrated value, after you set point 1 and move the probe to point 2 you won't see any effects from the 1st point you did. When you finish the calibration, close the window and re-enable the pH you'll then see the calibrated value.

 

[Lokilow]

Maybe it's a misunderstanding, the value you see when you calibrate is only the raw uncalibrated value, after you set point 1 and move the probe to point 2 you won't see any effects from the 1st point you did. When you finish the calibration, close the window and re-enable the pH you'll then see the calibrated value.

I think my issue was I had my check freq set to every 10 minutes so after i calibrated then turned the sensor back on my values on my graph didnt update immediately. After going back to try to re-cal the cal window does show my new values.

As a thank you for the help, here is my "reef" aquarium.

 

[robsworld78]

I think my issue was I had my check freq set to every 10 minutes so after i calibrated then turned the sensor back on my values on my graph didnt update immediately. After going back to try to re-cal the cal window does show my new values.

As a thank you for the help, here is my "reef" aquarium.

Nice, that's the kind of reef tank I have too.

 

[terrapi]

Hey guys,

Im back asking for more help. So I have a reef pi setup currently with a PWM controller controlling two lights for my fresh water setup. I want to add a PH probe to my setup.

I bought the Atlas PH probe circuit- https://atlas-scientific.com/embedded-solutions/ezo-ph-circuit/
Atlas Mini-PH Probe- https://atlas-scientific.com/probes/mini-ph-probe/
And Atlas Carrier Board- https://atlas-scientific.com/carrier-boards/electrically-isolated-ezo-carrier-board-gen-2/

I have followed the outdated guide- https://learn.adafruit.com/reef-pi-guide-7-ph-monitoring?view=all

So here is the issues im running into. I can not get the raspberry pi to see the sensor. I have it connected in parallel to my PWM controller and trying to read it using I2C. It will see the PWM IF i have the PH disconnected. If Both are connected the Pi wont see either or itll only see address 40 of the PWM controller.

Once I was able to get it to see both sensors via I2C. So I then tried to follow the guide and set the sensor up on Reef Pi i run into my next issue. When I go to the PH tab and click the plus button, the Analog Input drop down shows nothing. Do i need to create a driver like I did with the PWM controller?

I have also tried wiring it up as TX to Tx and Rx to Rx, as well as TX-Rx and Rx-Tx. Once again the Analog input doesnt show anything.

What am I missing?

Thanks!

i had the same problem,
since a few days im building my own reef pi build for my aquarium + vivarium. everything works fine but I can't get the sensors to show up on the temperature tab.

I checked if they show up by typing

pi@raspberrypi:~ $ ls /sys/bus/w1/devices/

and the respons shows 2 sensors and the usual bus check w1_bus_master1

the sensors showing up are the combined ones in the dht11 (temp and humidity)

but now back to the problem, I can't select them in the ui, they won't even show up in the dropdown. what did I do wrong, I enabled one wire in the config but every time I select it again it again asks me if I want to enable it. does this have anything to do with it?

 

[Lokilow]

Have you told the reef pi to use the proper driver?

Also you need to point reef pi to the right location the sensor is on. Read above and open the guides posted in the thread by Rob. Give those things a try and let us know what you see.

 

[terrapi]

Have you told the reef pi to use the proper driver?

Also you need to point reef pi to the right location the sensor is on. Read above and open the guides posted in the thread by Rob. Give those things a try and let us know what you see.

no I havent, thanks for your reply. I tried getting the proper driver but I can't figure out where to upload it. I need to get in the settings tab to the subtab drivers. do I then choose file digital? even though Ive got a lot of experience with rpi and ai its not really helping with reef-pi so excuse me for asking.

 

[Lokilow]

You dont upload any drivers. They are selectable in the configuration tab under drivers.

Again, read through the guides posted in this very thread and let us know where you are getting stuck.

Robo-Tank RevB Setup Deluxe Controller for reef-pi Manual .docx

Setup reef-pi for RevB Deluxe Controller July 29, 2020 – Version 1.0 Safety Reminder READ & FOLLOW ALL SAFETY INSTRUCTIONS DANGER Never handle electrical equipment with wet hands special care should be taken since water is employed in the use of aquarium equipment Do not attempt...

docs.google.com

reef-pi Guide 6: pH Monitoring

Corals are sensitive to pH changes. Most tropical corals thrive at a pH of 7.8 to 8.1. In reef aquariums, pH can fluctuate due to a high level of CO2 in the indoor environment or additional food or chemical reagents. Monitoring pH allows discovering any pH fluctuation, designing the right dosing...

learn.adafruit.com

 

[SilverBulletPRN]

Hey, I've been following this thread and I am having this exact problem with the same setup.
I tried deleting everything and re-adding everything back but analog still shows up empty. Is there anything else I can try?

 

[Ranjib]

@SilverBulletPRN are you still facing issue ? If so please start a thread and we can take a look