Serial bridge implementation

src/Dispatcher.cpp

@@ -1,7 +1,7 @@
 #include "Dispatcher.h"
 
 #if MESH_PACKET_LOGGING
-  #include <Arduino.h>
+#include <Arduino.h>
 #endif
 
 #include <math.h>
@@ -104,6 +104,7 @@ void Dispatcher::loop() {
       processRecvPacket(pkt);
     }
   }
+
   checkRecv();
   checkSend();
 }
@@ -115,6 +116,18 @@ void Dispatcher::checkRecv() {
   {
     uint8_t raw[MAX_TRANS_UNIT+1];
     int len = _radio->recvRaw(raw, MAX_TRANS_UNIT);
+
+#ifdef BRIDGE_OVER_SERIAL
+    // We are basically stamping metadata from the last RF packet into something that came from serial,
+    // it works for now. But long term the code on checkRecv() should be refactored to be able to deal
+    // with both use cases without dupeing the existing code. I've chosen [for now] not to dupe and just
+    // fake the metadata.
+
+    if (len == 0) {
+      len = bridge_interface->getPacket(raw);
+    }
+#endif
+
     if (len > 0) {
       logRxRaw(_radio->getLastSNR(), _radio->getLastRSSI(), raw, len);
 
@@ -280,7 +293,11 @@ void Dispatcher::checkSend() {
       }
       outbound_expiry = futureMillis(max_airtime);
 
-    #if MESH_PACKET_LOGGING
+#ifdef BRIDGE_OVER_SERIAL
+      bridge_interface->sendPacket(outbound);
+#endif
+
+#if MESH_PACKET_LOGGING
       Serial.print(getLogDateTime());
       Serial.printf(": TX, len=%d (type=%d, route=%s, payload_len=%d)", 
             len, outbound->getPayloadType(), outbound->isRouteDirect() ? "D" : "F", outbound->payload_len);
@@ -290,7 +307,7 @@ void Dispatcher::checkSend() {
       } else {
         Serial.printf("\n");
       }
-    #endif
+#endif
     }
   }
 }
@@ -328,5 +345,4 @@ bool Dispatcher::millisHasNowPassed(unsigned long timestamp) const {
 unsigned long Dispatcher::futureMillis(int millis_from_now) const {
   return _ms->getMillis() + millis_from_now;
 }
-
 }