Raspberry Pi Thermostat

[Oliver.M.]

Ok, I would like to have a thermostat at home with a potentiometer on it to set the temperature, i have this working through the MCP3008 however i would also like a web interface where i can control the temperature remotely, however i do not know how to do this, i also need it so when i get back home i can turn the potentiometer to the desired temperature, and it will override the web page and so when i go out and set the temperature on the web page it overrides the potentiometer. Now would also be a good time to mention that i have a standard 16x2 LCD connected to display the temperature set by the potentiometer however i could always replace this with an IC2 one so i have more GPIO.

How would i do this, i have very limited knowledge on web interfaces and my python is not brilliant.

Thanks

[elatllat]

What you want first is a quality UPS and/or a reliable reboot on power loss as you don't want your pipes bursting if the power goes flaky in sub zero weather.

Other than that you will want to scrap your potentiometer in favor of a Rotary encoder or up/down buttons.

(as a less intuitive design you could use a potentiometer + a "start using the potentiometer again" button.)

[Oliver.M.]

Thank you for your quick reply, I think you are right about the buttons, the potentiometer is what is holding me up right now because I don't know how to disable it for web control however buttons will be a lot better because of the finer control, and being easier to store the state as a variable etc.

[boyoh]

Ok, I would like to have a thermostat at home with a potentiometer on it to set the temperature, i have this working through the MCP3008 however i would also like a web interface where i can control the temperature remotely, however i do not know how to do this, i also need it so when i get back home i can turn the potentiometer to the desired temperature, and it will override the web page and so when i go out and set the temperature on the web page it overrides the potentiometer. Now would also be a good time to mention that i have a standard 16x2 LCD connected to display the temperature set by the potentiometer however i could always replace this with an IC2 one so i have more GPIO.

How would i do this, i have very limited knowledge on web interfaces and my python is not brilliant.

Thanks

What type of thermostat are you using ?

[Oliver.M.]

What you want first is a quality UPS and/or a reliable reboot on power loss as you don't want your pipes bursting if the power goes flaky in sub zero weather.

Other than that you will want to scrap your potentiometer in favor of a Rotary encoder or up/down buttons.

(as a less intuitive design you could use a potentiometer + a "start using the potentiometer again" button.)

Thank You for your suggestion, i have taken your advice and replaced the potentiometer with two buttons which is already about 10 times better than the potentiometer. I have also ordered an I2C LCD as i have no GPIO left!

[Oliver.M.]

Ok, I would like to have a thermostat at home with a potentiometer on it to set the temperature, i have this working through the MCP3008 however i would also like a web interface where i can control the temperature remotely, however i do not know how to do this, i also need it so when i get back home i can turn the potentiometer to the desired temperature, and it will override the web page and so when i go out and set the temperature on the web page it overrides the potentiometer. Now would also be a good time to mention that i have a standard 16x2 LCD connected to display the temperature set by the potentiometer however i could always replace this with an IC2 one so i have more GPIO.

How would i do this, i have very limited knowledge on web interfaces and my python is not brilliant.

Thanks

What type of thermostat are you using ?

I am using an old thermostat similar to this: http://products.danfoss.co.uk/productra ... ons/rmt24/

[Oliver.M.]

Ok, I have the relays, buttons and LCD working however I now also need to be able to control the system over the internet, However I don't know any PHP or HTML.

Thank You

[evilkitty]

IF you are trying to controller your house's heat/ac i have something that may be of help
I did not make any of the image files in this, i typed all the source code unless noted in the code
the inside of my thermostat looked like this
http://cdn2.hubspot.net/hub/88935/file- ... 9201442858
one only difference was the right side of the unit was empty space
i put my DIY relay/sensor/night-light board there and ran a wire (Ethernet modified to have 9 wires) out in the wall over to my pi in a 22 cubic inch electrical box
from there i made the tubes inputs so my pi can read them and put relays in there place (electrically)

the math in the javascript and python gets confusing (ok i warned you, it even confuses me if i try reading it and i wrote it)

http://www.mediafire.com/download/t44r9 ... at.tar.bz2
THIS IS NOT A DROP IN SOLUTION FOR OP

[Oliver.M.]

IF you are trying to controller your house's heat/ac i have something that may be of help
I did not make any of the image files in this, i typed all the source code unless noted in the code
the inside of my thermostat looked like this
http://cdn2.hubspot.net/hub/88935/file- ... 9201442858
one only difference was the right side of the unit was empty space
i put my DIY relay/sensor/night-light board there and ran a wire (Ethernet modified to have 9 wires) out in the wall over to my pi in a 22 cubic inch electrical box
from there i made the tubes inputs so my pi can read them and put relays in there place (electrically)

the math in the javascript and python gets confusing (ok i warned you, it even confuses me if i try reading it and i wrote it)

http://www.mediafire.com/download/t44r9 ... at.tar.bz2
THIS IS NOT A DROP IN SOLUTION FOR OP

Thank you for your reply, this will help a lot with getting the webpage working.