2017-12-29, 09:58 AM
(2017-12-29, 12:39 AM)Arne Wrote:(2017-12-28, 12:46 AM)PaddyB Wrote:(2017-12-27, 07:17 PM)Arne Wrote: I'm planning to buy myself a BMV-702, what do you use to connect it to the RPi, the original "Victron VE.Direct - USB Interface" ??
I use an arduino with the basic software serial sketch.
But how have you connected the BMV-instrument to your Arduino?
It's actually a mppt controller I have but the interface looks the same VE direct . 4 connectors, 5v, ground, rx & TX. I used dupont female wires to connect onto the pins, not ideal by far but works just. Thinking back (not on the boat today) it was probably an arduino mega as it has several serial in/out pins so victron TX onto arduino rx, rx to TX and ground. Arduino gets its power from usb. Then the win laptop found the victron straight away with the arduino echoing the 2 serial ports.