On 23/10/2019 22:42, Robin wrote:
On 23/10/2019 22:10, Steve Walker wrote:
snip

TRVs and single room stat only run the system while that one room is
too cold. Once it heats up, the whole system stops, even if other
rooms are too cold. The whole system only runs or stops at the same
times of day.

Timer/stat per room allows each room to have different times as well
as temperatures, runs while any room is too cold and shuts down boiler
and pump when there is no demand.


Do you happen to know of a way to have a timer and stat per room but
adjust centrally the temperatures - or even just adjust them all up or
down by the same amount?Â* I ask as IMLE one advantage of TRVs and a
single room stat is that if the stat is set lower than usual then (with
a reasonably balanced system) the rooms with the TRVs also stabilise at
a lower temperature than the TRVs would maintain.Â* It's useful for
people who have days when they want the house warm and days when they
want to the house very warm.

Yes and no. I have actually been thinking of replacing all ours with
ethernet equipped Arduinos (not a separate shield) with touch screens
and 1-wire temperature sensors.

Another couple of Arduinos to operate the relay boxes upstairs and
downstairs and probably another one as central controller/webserver.

The idea being that settings, boost, etc. for any room could be brought
up in any other room or PC or phone.

I was also planning wi-fi alarm clocks, so the bathroom and living room
would adjust to come on before the alarms go off rather than at a fixed
time.

Whether I'll actually get around to it I don't know - although I have
just bought a touch-screen to experiment with one of the Arduinos that I
already have.

SteveW