Probably a silly question, but I opened my emonpi because the RFM SMA had come loose and there is a ground cable just lying there its connected to the board but not to anything else.
Was it grounded to the box by the screw or am I missing something simple?
Probably a question for @Gwil
The loop should be placed around the thread of the screw nearest the SMA. The loop will therefore be between the aluminium side plate and the rest of the aluminium enclosure. The other end of the wire should be on the ground pin of the emonpi board.