The dead link goes back to an old Shop page (@Gwil please note - link to the emonTx Wiki page instead? Also the emonPi Wiki has the same bad link here: EmonPi - OpenEnergyMonitor Wiki).
Hi Robert thanks for that link however I am finding it a bit confusing, the picture of the RJ45 shows a cable with 4 wires(green/red/blue/brown) which are different to the 3 that I have on my sensor, mine have 3 wires (red/black/yellow).
I assume that red is +ve and black is -ve and yellow is data so am i right in thinking that I should wire the RJ45 with data on pin 4 and +ve on pin 2 and -ve on pin 1 or 3?