simple serial command protocol

tagged responses, just because

1 files changed, 4 insertions, 0 deletions

diff --git a/pm.h b/pm.h
index 7ac2050..116c74b 100644
--- a/pm.h
+++ b/pm.h
@@ -102,4 +102,8 @@ public:
     sps30_sleep();
     awake=false;
   }
+
+  bool serialCommand(const String &tag, const String &command) {
+    return false;
+  }
 };