Well its been a while since i last updated my progress and as you can see I've had a lot of progress. I've finally got round to finding a suitable enclosure to house everything, Im just waiting for some 3 pin plug sockets. I now have my soil sensors with custom probes installed and working so rather than just watering the plants daily they will only get watered when needed. The soil gets checked every hour and if soil is above a set level then will activate the water pumps for user set duration (can be set from front panel :) ). All fans and light are now running off 230v and controlled via individual 40A solid state relays. I am in the process for adding a heater as I've noticed the temperature dropping an the night.

Heres a pic of the insides a little bit messy, at the bottom right of the box i have installed 5x 3.5mm stereo jacks and made the two Yellow jacks for temperature sensors, Green is for water pumps, and Blue for the soil sensors.

Heres the main control panel from the front

3.5mm jacks just installed.

the 3.5mm jack panel, I originally only was using it for inputs then later added the centre jack for the water pumps.

A close up of the soil probes.