btstack/docs/rfcomm-multiplexer.gv

digraph rfcomm_multiplexer {
	// rankdir=LR;
	size="8,5"
    // orientation=landscape;
    // rotate = 90;

    CLOSED  [shape=doublecircle];
	OPEN  [shape=doublecircle];
	
	CLOSED->W4_CONNECT [label = "create_channel outgoing"];
    W4_CONNECT->SEND_SABM_0 [label = "l2cap channel open"];
    SEND_SABM_0->W4_UA_0 [label = "SEND SABM"];
    W4_UA_0->OPEN [label = "RECV UA#0"];
    CLOSED -> W4_SABM_0 [label = "l2cap channel open incoming"];
    W4_SABM_0->SEND_UA_0 [label = "RECV SABM #0"];
    SEND_UA_0->OPEN [label = "SEND UA#0"];

    OPEN->SEND_UA_0_AND_DISC [label = "RECV DISC#0"];
    SEND_UA_0_AND_DISC->CLOSED [label = "SEND UA#0"];
    OPEN->CLOSED [label = "RECV DM#0"];
}