Tomasz Korwel
programmer, administrator, engineer – my everyday fights with reality

We finally moved in to our new house. After couple of days spent on cleaning, unpacking and making ourselves comfortable we figured out one thing – the HVAC system is just a disaster.

First – the thermostat is in the worst place in the house. Simply first test shows that while the thermostats shows 1 degree differences, the actual temperature it that room floats more than 2 degrees in each direction.

Second – all registers are broken – none of them shuts completely and none of them works smooth

Third – the A/C unit and fan are probably undersized (I still have to make measurements) – it needs to work for more than 1h to cool down the room by 1 degree.

A lot of work is waiting but it only makes me more motivated to quickly finish that project.

Technorati Tags: HVAC, thermostat, temperature, registers, A/C

I’ve spent almost whole night and half of today’s morning to get it to work on Ubuntu. Detailed report later – now for those who are interested live (refreshed every 15 minutes) temperature readings from our house:

If the time scale looks like they are outdated – probably they are – it may simple means that laptop lost network connection :-). But don’t worry – they will be updated

I have just got my order placed at Embedded Data Systems. I have one masted 1-Wire bus controller (DS9007U) and couple of temperature sensors.

One day, one hard drive and couple hours later…

For test purposes I hooked up two sensors and put them in our current house – one in bedroom, one in living room. Below you may see temperature reading from last night.

As you may see the temperature in bedroom constantly goes down. Strange uh? No if you keep in mind that we left the window open :-)

As you may also noticed, the graphs ends around 2:50a.m. That’s when my hard drive said “I won’t work any more for ya!”. Lycky me, I had backups.