To control my power sockets, receive push notifications and display TinyTX sensor data I developed a small android app, which connects to my Raspberry Pi.
With the help of Nathan and the german Raspberry Pi Forum I’ve adapted the development process for remote sensors which are connected via 433Mhz senders. The describtion for the installation and manufactoring of the sensors is described on the Website of Nathan and the german Raspberry Pi Forum. The TinyTX sketched from the Raspberry-Pi Forum are published on github: https://github.com/meigrafd/TinyRX4, https://github.com/meigrafd/TinyTX4
I have currently a DHT22 sensor which measures the temperature and the humidity, a DS18B20 temperature sensor and a PIR Sensor. Next I’m planning to add a LDR sensor.
The sender modules work with 3,3V which lead to problems with the PIR Sensor which only works accurate with 5V. I’ve discovered the solution for this problem on the following site: http://techgurka.blogspot.de/2013/05/cheap-pyroelectric-infrared-pir-motion.html