DHW & CH programmers

If not commercially available then seems like a good choice for something like an Arduino?

Some programmable thermostats have a "days off" function that might do at a pinch.

Lee

A crude solution would be three programmes wired in parallel, with a switch to select which is in charge!

I had thought of something similar, as the programmers have battery backup and clip on a baseplate get three and set each for a given week and just swop them over but that will work out an expensive option.

Thanks anyway

I can't say I've ever come across anything like that for the domestic market, all 1, 7 or 5+2 day jobbies.

What you might be able to find is an industrial timer/programmer that will do n events per day for a year. The sort of thing that controls the flashing lights for schools so they don't come on during the holidays.

programmer that will suit my shift patterns.

where I can preset the timings for week 1,2 & 3 so I can select which week I'm on at a press of a button.

which I have now.

I took my new prototype Raspberry Pi based heating controller along to the Reading Geek Night last night, but it's not ready for use yet. I have two other households in the family who want heating controllers like the ones I did 13 years ago, and Raspberry Pi based seemed like the way to go nowadays, rather than a PC. (It's more powerful than the 120MHz Pentiums I originally used, and even they were overkill.)

programmer that will suit my shift patterns.

where I can preset the timings for week 1,2 & 3 so I can select which week I'm on at a press of a button.

which I have now.

Were you ultimately planning to have it talk to the serial bus equipped boilers that sport some variant of a two wire interface?

programmer that will suit my shift patterns.

where I can preset the timings for week 1,2 & 3 so I can select which week I'm on at a press of a button.

which I have now.

requirements.

Since none of the boilers I control (or plan to control) have this, it's not a priority. Once you've got good heating control, it doesn't seem to pay to replace an old boiler just on economy grounds.

I haven't looked at opentherm yet, but I will when it comes to boiler replacement, and that's probably on the cards for the oldest in the next year.

Actually, one thing I need to find is a source/supplier of room thermostats which are actually just potentiometers, but look like the real thing. I have been using Satchwell DRT3451, but these were really for a range of long-obsolete fanfoil aircon units, and all sources have dried up. I haven't been able to find anything else yet. Obviously, I can make up a box with a knob on it, but it won't look as good as a real molded/contoured one professionally marked up.