Calculate TX air time duty cycles #588 -- UNTESTED

src/mesh/RadioLibInterface.cpp

@@ -88,6 +88,7 @@ ErrorCode RadioLibInterface::send(MeshPacket *p)
     printPacket("enqueuing for send", p);
     uint32_t xmitMsec = getPacketTime(p);
 
+
     DEBUG_MSG("txGood=%d,rxGood=%d,rxBad=%d\n", txGood, rxGood, rxBad);
     ErrorCode res = txQueue.enqueue(p, 0) ? ERRNO_OK : ERRNO_UNKNOWN;
 
@@ -96,6 +97,11 @@ ErrorCode RadioLibInterface::send(MeshPacket *p)
         return res;
     }
 
+    // Count the packet toward our TX airtime utilization.
+    //   We only count it if it can be added to the TX queue.
+    logAirtime(TX_LOG, xmitMsec);
+    
+
     // We want all sending/receiving to be done by our daemon thread, We use a delay here because this packet might have been sent
     // in response to a packet we just received.  So we want to make sure the other side has had a chance to reconfigure its radio
     startTransmitTimer(true);