prefix for Serial prints

* `#` → debug
* `!` → warn

1 files changed, 1 insertions, 1 deletions

diff --git a/main.ino b/main.ino
index e51c3ea..1963870 100644
--- a/main.ino
+++ b/main.ino
@@ -34,7 +34,7 @@ void setup() {
   battery.start();
   co2.start();
   pm.start();
-  Serial.println("Waiting for first measurement... (5 sec)");
+  Serial.println("# Waiting for first measurement... (5 sec)");
 
   delay(5000);
 }