Tag Archives: A Node-Red Thermostat for Holiday Rental and Air Source Heat Pump heat

The 2019 Thermostat ReThink

Back in 2017 I wrote a blog entry called “A Thermostat Weekend” – some weekend that turned out to be. Well, to cut a long story short, the stat worked but I was at the time just finding out all about NEST and other modern stats and so my ESP-GO/Node-Red thermostat development started gathering dust.

Then we fitted a new Air Source Heat Pump heating system and it looked like my thermostat skills might be redundant. This new system came with a Salus IT 5000 Thermostat – absolutely lovely App, nice display and this I thought would well and truly bury my interest. How wrong could I be.

Stat web interface

Here is the latest version of my stat web display (Dashboard) – I removed the redundant FROST setting and improved the formatting today (29/02/2019). More soon no doubt.

I found some issues with the original QDTECH 240*160 LCD display in terms of reset reliability bearing in mind I’m short of IO pins and reset is hooked to processor reset (I just realised that I can use GPIO0 as an output with a new command, to reset the display) and I’ve changed to an ILI9341 for the final version as well as fixing some bugs with AWAY timing, VASTLY improving the web stat (Dashboard) css and adding multi-functions to the two available inputs – so that “up” and “down become “auto” if pressed simultaneously OR if either of the two buttons are long-pressed. I’ve done this extra functionality in Node-Red. The larger display also shows full time, day and date as well as “away” status. Also not yet shown here but in one unit I’m using cheap single-key touch panels for manual heat up and down.

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