LCTech relay control via Espurino

Is there a way to redirect the console outputs to another channel that I can observe, whilst keeping the serial1 channel just for the comms to the module?

Yes, just use LoopbackA.setConsole() and then add whatever listener you want with LoopbackB.on('data', ...) - or just replace LoopbackA with whatever output device you want the JS console to appear on.