## Send a message between two projects # Author : sunghyun-an  ** seunghwan ** and ** sunghyun ** bridge and node are connected. At first, all five lights went out to find out what was the problem, confirmed that there was a problem with the cable, replaced the cable, and solved it.<br> It has the id of node 0, 1, 2, 3, 4 from the left.<br> I tried commands to each node through the Arduino serial monitor, everything was good.