emonGLCD

Glyn from OpenEnergyMonitor surprised me pleasantly the other day by sending me an emonGLCD unit to evaluate – thanks! Building it was easy, and an hour later I had it working. Quite nice piece of hardware, a must-have for home monitoring and automation projects. I will be doing customizations in the future and make blog posts…

Low power receiver options

There is quite some buzz in the RFM12B community recently on low power remote receiver nodes, these are remote, battery-operated nodes that would listen for incoming commands and react to them. The challenge is that keeping the RFM12B powered on all the time eats battery like cheese. There are few ideas floating on how to address that…

Solar statistics

Earlier this year I purchased a 220l non-pressurized evacuated tube solar heater and installed it myself on my rooftop. It is a relatively cheap (~440 Euro) solution for domestic hot water. I chose the non-pressurized type because of its simplicity and relative safety in case of overheating. Also, it does not require additional pumps, cold…