Hydroponics project with Rpi PH EC and the works (In progress)

[shramik_salgaonkar]

@pihydro.0001

I’m just scared to actually use cayenne for that since sometimes I click the on/off button and it might take 1 second or it might take 5-6. with a motor running that would be a big difference esp on a 20 gallon DWC tank.

you dont have to be scared. As whether it is 1 sec or 5-6 second, it is the time for the data to reach your device. So when this data is reached start your motor.

@pihydro.0001

What I really want is to be able to add buttons/tiles that execute scripts\path on the pi that would be amazing I’m going to look into that tonight.

have a look at this.

Executing custom code on your Raspberry Pi from Cayenne

A frequent question on the forum has been how Raspberry Pi users can run any code on their Pi, triggered from a Cayenne action or widget. This is possible with your Pi connected through our ‘Bring Your Own Thing’ MQTT API, so I’ve made a quick guide to show how to do this. Setup For this example to work, your Pi must be connected to Cayenne via the MQTT API rather than via the original Cayenne Pi Agent software. To do this, follow the ‘Installation’ and ‘Cayenne Setup’ instructions for …

[mygreenhousse]

Hi,
congrats for you greenhousse project. I try to do the same since a cup of weeks. I tried alone in my corner. I found this by chance and decide to made a connection and it’s great. I follow you at star date 1807.11
Thanks for your share.

[sralesurk]

hi,
Great project,
i’m new to cayenne. would it possible to share the code? or is uploaded somewhere

[shramik_salgaonkar]

the code is not provided by the user but you it is very easy to develop one using cayenne. Which device are using arduino or raspberry pi. Have you got all the sensors needed for the project?

[sralesurk]

I’m used to Raspberry, but auduino could be use if easier. I have the probes three atlas with ph, orp and ec via i2c. and the a couple of temperature sensors and 8 relay outputs.
The main interest for looking at the code would be to see how:
The interfacing to the altas probes the which is my first task is done, thereafter how to go from a probe reading to calculating volume chemical (to reach ideal again) which in turn should give a certain on time on a relay output for the dose pumps.
Then i have some simple, if, then and time, programming of other outputs and displaying which look simple to do with Cayenne. Which by the way is quite a need tool

[tpangburn]

Hey glad your interested in my project. I am very sorry I didn’t put the code in here. So I got laid off last year and I ended up having to move. So life has been a total mess for a while now. I’m not sure when I will get back to doing anything on this project. I will try to see if I have any of the code around. I think it might have ended up on one of my PCs that still in my storage place.

[sralesurk]

Sorry to hear of all your problems, hope things are better now, if you get around to finding some time finding the code would be great.

[tpangburn]

Well thanks for all the interest and Sorry i dropped the ball on this project. At the moment I was looking at my aquarium project so depending on what happens there I might start posting for that. I do want to get back to doing a hydroponics one based on the card I made more recently.