Central heating with underfloor heating and existing openhab integration advice required

[HestiaPi]

Hey Tim,
let me dig into your post and reply one item at a time.

@Greylinux

1. So when I started the Pi’s for the first time at the same time I had a conflict with both Pi’s presenting the same ip address of HESTIAPI (new V10 Image with turnkey script ) which meant one I couldn’t work out immediately which Pi I was providing WIFI credentials too, but ultimately the other Pi rebooted till I managed to find its HESTIAPI network and add WIFI credentials to it . This is no major problem only what I found and obviously its only an issue should you have more than one HestiaPI.

To be honest we haven’t thought about multiple HestiaPis boot at the same time for the first time. What happened is that you got 2 networks with the same SSID (HESTIAPI) and you couldn’t tell which was which. Of course one solution would be to power up one at a time. The other solution, and probably what you did, was to setup blindly whichever you connected to and see which restarts. Once they are connected to your actual home network they will get unique IPs which will also be displayed on the loading screen to help you identify.

@Greylinux

2)I had a slight problem that I managed to mis-align an LCD display due to how it was positioned in the case and because I didn’t notice for about 10 minutes this somehow was short circuiting and cause the transformer to heat up to the point where you couldn’t touch it. Once I realised what I had done, rectified and restarted the Pi it cooled down. I thought I would mention this to help out anyone that might make this mistake, make sure that the connection block on the back of the LCD is perfectly in line with the PI GPios and make sure the LCD illuminates before moving on .

We are changing the case design to minimise these situations. It needs indeed some extra care to align everything.

@Greylinux

I did notice that the transform for the binary.map for the heating switch item was not present in the transform directory of the new image

You are absolutely right. Well spotted. Replacing the download with a new image. Thank you!

@Greylinux

4. why do I receive this image when I boot the Pi

Hmmm… never seen this. There may be a bug on Chromium. Try this suggested solution

Google Chrome wont start after changing hostname

rm -rf ~/.config/chromium/Singleton*

@Greylinux

as I understand it the switches change the target temp with rules

The switches change the item “TempSetpoint”. Then rules are used to control when to turn the heating on and off to reach these setpoints. So if you renamed the setpoints for each HestiaPi you will need to apply the same change in the rules file.

@Greylinux

to increase and decrease incrementally using switches requires rules

The setpoint entry in the sitemap file (/etc/openhab2/sitemaps/default.sitemap) is this:

Setpoint item=TempSetpoint minValue=0 maxValue=40 step=0.5 icon="temperature"

The “step” parameter shows the increment step. You then need to keep the bidirectional MQTT (read and write) for the item and it should work.

@Greylinux

How do I remove certain elements that are displayed ?

See the HABPanel section of my answer below and follow steps 1-8.

[SOLVED] (Example) Broken relay in my pre-assembled HestiaPi

Hello @auch1 and welcome to the forum That does not sound fun at all so lets dig right into it and find whats wrong: The HTML loader is working in the following way: The HTML is using one DIV to show the graphics, countdown etc and another hidden DIV that is trying to load the HABPanel URL (http://localhost:8080/habpanel/index.html#/view/HestiaPi) every x seconds. Every y seconds its checking if the hidden DIV loaded the HABPanel which means that OpenHAB finally finished loading. This…

Then click the edit icon at the top, next to the title and you are in edit mode where you can move, remove and resize everything. I think HestiaPi’s screen only changes on reboot so once your screen looks ok on your laptop, reboot HestiaPi for the changes to take effect. Please keep in mind that you laptop’s resolution and aspect ratio may be different from the LCD so make sure you compensate accordingly.

Well done!!!