Many project construction details are on our website l0l.org.uk. Here I'll just quickly outline how to make a v2 base-station and a single wireless sensor, you'll also need some more software from our git repositories.

Assemble a base-station from a Raspberry Pi B+, sd-card, power supply and rfm12b dongle. You can use a JeeLink or a directly connected board.

Download the thingbox.io image to the sd-card and boot the Pi. If you're using a direct connection you'll have to enable SPI and install the drivers - instructions here.

Configure your Raspberry Pi as per the thingbox instructions and load our flows from git into Node-RED.

Assemble a wireless sensor from a JeeNode v6 and a battery. You'll need a few extras like a case and battery connections, and of course a sensor (I like waterproof DS18B20's). Connect up the temperature sensor (don't forget the 4.7k resistor between Vcc and DQ) and optionally, a battery monitoring circuit.

Load in our 'configurator' sketch from github and use the serial terminal to set the ports you wired the temperature sensor and the battery monitoring sensor into.

Now load the main aquaponics sketch and customise it so that the delay period is as required - every 5 seconds will give you poor battery life - every 60 seconds is more reasonable. Once the sensor sketch is uploaded you should see reading appearing in the Node-RED screen of the Raspberry Pi