From 1416f83f8cbc00255c57336ba4f900718f154c9d Mon Sep 17 00:00:00 2001
From: Harald Barth <haba@kth.se>
Date: Sat, 15 Jan 2022 17:24:18 +0100
Subject: [PATCH] Serial check, mostly for Teensy, does not impact startup if
 Serial is available

---
 SerialManager.cpp | 36 +++++++++++++++++++-----------------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/SerialManager.cpp b/SerialManager.cpp
index 6fbdf61..8717227 100644
--- a/SerialManager.cpp
+++ b/SerialManager.cpp
@@ -1,5 +1,6 @@
  /*
  *  © 2021 Chris Harlow
+ *  © 2022 Harald Barth
  *  All rights reserved.
  *  
  *  This file is part of DCC++EX
@@ -19,32 +20,33 @@
  */
 
 #include "SerialManager.h"
- #include "DCCEXParser.h"
-  SerialManager * SerialManager::first=NULL;
+#include "DCCEXParser.h"
+SerialManager * SerialManager::first=NULL;
 
-  SerialManager::SerialManager(Stream * myserial) {
-    serial=myserial;
-    next=first;
-    first=this;
-    bufferLength=0;
-    inCommandPayload=false; 
-  } 
+SerialManager::SerialManager(Stream * myserial) {
+  serial=myserial;
+  next=first;
+  first=this;
+  bufferLength=0;
+  inCommandPayload=false; 
+} 
 
 void SerialManager::init() {
+  while (!Serial && millis() < 5000); // wait max 5s for Serial to start
+  Serial.begin(115200);
+  new SerialManager(&Serial);
 #ifdef SERIAL3_COMMANDS
-    Serial3.begin(115200);
-    new SerialManager(&Serial3);
+  Serial3.begin(115200);
+  new SerialManager(&Serial3);
 #endif
 #ifdef SERIAL2_COMMANDS
-    Serial2.begin(115200);
-    new SerialManager(&Serial2);
+  Serial2.begin(115200);
+  new SerialManager(&Serial2);
 #endif
 #ifdef SERIAL1_COMMANDS
-    Serial1.begin(115200);
-    new SerialManager(&Serial1);
+  Serial1.begin(115200);
+  new SerialManager(&Serial1);
 #endif
-    Serial.begin(115200);
-    new SerialManager(&Serial);
 }
 
 void SerialManager::broadcast(RingStream * ring) {