Arduino PID & Data Reporting Dashboard

[Wortslurpin]

Lets get this straight from the start...I do not consider myself an Arduino coding expert...but I have recently taught myself how to send PID controlled data from an Arduino to a web server and display the data real time on a webpage. I thought I would share it for those interested.

The full tutorial is located here http://www.fermentationriot.com/arduinopid.php

The dashboard will look like this when done:

Happy Brewing to All!

 

[dmomo]

Awesome. Have you fond a way to monitor SG?

 

[cobolstinks]

very cool, i just completed a project using a netduino and one wire sensors but i don't have it controlling a pid. https://www.homebrewtalk.com/f51/netdunio-onewire-temp-monitoring-298238/

What PID are you using? Do you think it would work with the netduino?

 

[Wortslurpin]

I modified the PID library from Arduino.cc

http://arduino.cc/playground/Code/PIDLibrary

I dont have a good answer on the netduino and compatibility though.

 

[Wortslurpin]

My final goal is to have a web user interface which allows the setpoint or PID parameters to be easily changed on the fly. I'll post more if I get it working...

 

[canyonbrewer]

any updates?

 

[EFaden]

Tagging..... interesting project.

 

[cobolstinks]

what js library are you using for those gauges?

 

[Wortslurpin]

The gauges are from Google Charting apis:

http://code.google.com/apis/chart/interactive/docs/gallery/gauge.html

 

[Wortslurpin]

Regarding an update - I cant say I have a whole lot to add today. As I am going to be moving in the near future I haven't put a lot of effort in to this lately. However, this will definitely be built into the dedicated brewing room in the new home. Ill keep you updated once I progress further with this.

 

[Adeering]

Question about your PID code. I was looking at the example for relay for the PID library and they have this:

if(Output < millis() - windowStartTime) digitalWrite(RelayPin, HIGH);
else digitalWrite(RelayPin, LOW);

while you have it switched:

if(Output < millis() - windowStartTime) digitalWrite(RelayPin, LOW);
else digitalWrite(RelayPin, HIGH);

Why is this and is this working right, because mine doesnt seem to work right, also it is constantly switching the relay either on or off and thought it was suppose to be a delay of based on windowSize