clean up position broadcasts, send them even if we don't have gps lock

src/plugins/PositionPlugin.h

@@ -1,19 +1,26 @@
 #pragma once
 #include "ProtobufPlugin.h"
+#include "concurrency/OSThread.h"
 
 /**
  * Position plugin for sending/receiving positions into the mesh
  */
-class PositionPlugin : public ProtobufPlugin<Position>
+class PositionPlugin : public ProtobufPlugin<Position>, private concurrency::OSThread
 {
     /// The id of the last packet we sent, to allow us to cancel it if we make something fresher
     PacketId prevPacketId = 0;
 
+    /// We limit our GPS broadcasts to a max rate
+    uint32_t lastGpsSend = 0;
+
+    /// We force a rebroadcast if the radio settings change
+    uint32_t currentGeneration = 0;
+
   public:
     /** Constructor
      * name is for debugging output
      */
-    PositionPlugin() : ProtobufPlugin("position", PortNum_POSITION_APP, Position_fields) {}
+    PositionPlugin() : ProtobufPlugin("position", PortNum_POSITION_APP, Position_fields), concurrency::OSThread("PositionPlugin")  {}
 
     /**
      * Send our position into the mesh
@@ -31,6 +38,9 @@ class PositionPlugin : public ProtobufPlugin<Position>
     /** Messages can be received that have the want_response bit set.  If set, this callback will be invoked
      * so that subclasses can (optionally) send a response back to the original sender.  */
     virtual MeshPacket *allocReply();
+
+    /** Does our periodic broadcast */
+    virtual int32_t runOnce();  
 };
 
 extern PositionPlugin *positionPlugin;