From 65b728eebb313126b1e2a4b34e46aeb275dc68d4 Mon Sep 17 00:00:00 2001
From: Thomas Basler <thomas@familie-basler.net>
Date: Wed, 3 May 2023 21:16:27 +0200
Subject: [PATCH] Fix: No OpenDTU startup of CDC (like Pico or ESP32-S3)
 devices if no usb host is connected

Should also fix #826
---
 platformio.ini | 3 ++-
 src/main.cpp   | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index 511c79250..f3fc2a50b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -213,4 +213,5 @@ build_flags = ${env.build_flags}
     -DCMT_GPIO2=3
     -DCMT_GPIO3=8
     -DCMT_SDIO=5
-    -DARDUINO_USB_MODE=1
\ No newline at end of file
+    -DARDUINO_USB_MODE=1
+    -DARDUINO_USB_CDC_ON_BOOT=1
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 172b3a43d..aec7d0f38 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -26,8 +26,13 @@ void setup()
 {
     // Initialize serial output
     Serial.begin(SERIAL_BAUDRATE);
+#if ARDUINO_USB_CDC_ON_BOOT
+    Serial.setTxTimeoutMs(0);
+    delay(100);
+#else
     while (!Serial)
         yield();
+#endif
     MessageOutput.println();
     MessageOutput.println("Starting OpenDTU");