I have a project that is too much for one arduino to handle. When I try to expand my home power metering device to publish via the ethershield, it no longer works. So I thought I’d let another arduino take over and do the rest. I have piggybacked a duemilenova with a pro and will probably use i2c for communication. However, the rx/tx leds are constantly lit on the 2009. First I thought it was d0 and d1 causing confusion with two boards, but it is still the case after I cut the headers for d0 and d1 AND Vin.
Does anyone have a clue?