New serial protobuf transport approximately works and is backward

compatiable with the text debug output.

src/mesh/PhoneAPI.h

@@ -57,12 +57,12 @@ class PhoneAPI
     PhoneAPI();
 
     /// Do late init that can't happen at constructor time
-    void init();
+    virtual void init();
 
     /**
      * Handle a ToRadio protobuf
      */
-    void handleToRadio(const uint8_t *buf, size_t len);
+    virtual void handleToRadio(const uint8_t *buf, size_t len);
 
     /**
      * Get the next packet we want to send to the phone

src/mesh/StreamAPI.cpp

@@ -52,18 +52,19 @@ void StreamAPI::readStream()
  */
 void StreamAPI::writeStream()
 {
-    uint32_t len;
+    if (canWrite) {
+        uint32_t len;
+        do {
+            // Send every packet we can
+            len = getFromRadio(txBuf + HEADER_LEN);
+            if (len != 0) {
+                txBuf[0] = START1;
+                txBuf[1] = START2;
+                txBuf[2] = (len >> 8) & 0xff;
+                txBuf[3] = len & 0xff;
 
-    do {
-        // Send every packet we can
-        len = getFromRadio(txBuf + HEADER_LEN);
-        if (len != 0) {
-            txBuf[0] = START1;
-            txBuf[1] = START2;
-            txBuf[2] = (len >> 8) & 0xff;
-            txBuf[3] = len & 0xff;
-
-            stream->write(txBuf, len + HEADER_LEN);
-        }
-    } while (len);
+                stream->write(txBuf, len + HEADER_LEN);
+            }
+        } while (len);
+    }
 }

src/mesh/StreamAPI.h

@@ -59,4 +59,8 @@ class StreamAPI : public PhoneAPI
      * call getFromRadio() and deliver encapsulated packets to the Stream
      */
     void writeStream();
+
+  protected:
+    /// Are we allowed to write packets to our output stream (subclasses can turn this off - i.e. SerialConsole)
+    bool canWrite = true;
 };