From 08c18dbe6e8bf7bf7006f851f2ad6538bb965ba5 Mon Sep 17 00:00:00 2001
From: Dave Allie <dave@daveallie.com>
Date: Tue, 23 Dec 2025 14:00:51 +1100
Subject: [PATCH] Prevent Serial if no USB

---
 src/main.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index cf74479..03f5150 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -160,7 +160,12 @@ void onGoHome() {
 
 void setup() {
   t1 = millis();
-  Serial.begin(115200);
+
+  // Only start serial if USB connected
+  pinMode(UART0_RXD, INPUT);
+  if (digitalRead(UART0_RXD) == HIGH) {
+    Serial.begin(115200);
+  }
 
   Serial.printf("[%lu] [   ] Starting CrossPoint version " CROSSPOINT_VERSION "\n", millis());