From c38c0b71954a304a1060018c89fb6b34cf2ff425 Mon Sep 17 00:00:00 2001
From: Richard Bowman <richard.bowman@cantab.net>
Date: Wed, 22 Feb 2023 12:07:47 +0000
Subject: [PATCH] Echo back invalid commands

This was really helpful when debugging dodgy
serial connections - and shouldn't hurt anything
in normal operations.
---
 src/main.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index fc56122..2aaa915 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -74,7 +74,9 @@ void handle_command(String received_command)
     }
 
 #ifdef HELP
-    comPort->println(F("Type 'help' for a list of commands."));
+    comPort->print(F("Command not recognised: '"));
+    comPort->print(received_command);
+    comPort->println(F("', Type 'help' for a list of commands."));
 #else
     comPort->println(F("Invalid command"));
 #endif