General Information
Sunrise07:38
Sunset18:06
Temp. Outside16,0 °C
Temp. Inside22,4 °C

Usages for today
Gas3,18 m3
Power9,9 kWh
Water258 L

HA Statistics
Devices 292
Device values 1715

Hot Projects

Read about them
on my web log:
Smart meter
Opentherm
Ethernet Doorbell
Audio/Video
Mantis CNC Mill
DIY Wireless Sensors
ZigBee
Arduino

Last pages added:

Opentherm Gateway
Smart meter
Nemef Radaris Evolution
Audio Video

Pressure

This charts shows the pressure over the last 48 hours.









The ingredients for this DIY Pressure sensor


1 x JeeNode v4
A JeeNode  is essentially a small PCB with an ATMega328 microprocessor. The JeeNode is Arduino  compatible, which means you can create your sketches using the Arduino IDE and upload the compiled sketch to the JeeNode almost just as easy as you can with an 'original' Arduino. One additional thing is needed for that: a USB BUB .

2 x Digi XBee Series 2 modules
XBee and XBee-PRO  modules provide wireless connectivity to end-point devices in ZigBee mesh networks. XBee modules are ideal for low-power, low-cost applications.

1 x Sparkfun XBee RS232 board
This small RS232 board  makes it easy to connect a XBee module to a serial port. There are other solutions for USB, like the Digi XStick.

1 x battery holder

- Software  :-)

For measuring the pressure i use a completely different approach: this is a DIY ZigBee Sensor! With a JeeNode, 2 XBee modules, 3 batteries i've created my own ZigBee sensor. This is the first sensor i've made this way, but if all goes well, there are much more to come!

JeeNode + Sensor

JeeNode + Sensor


Digi XBee Series 2 module

Digi XBee Series 2 module


XBee Series 2 Coordinator on RS-232

XBee Series 2 Coordinator on RS-232 board