From 102fa53f8b5e701b7a6c271511af6a7b4894a8ea Mon Sep 17 00:00:00 2001
From: Kevin Matz <kevin@company235.com>
Date: Tue, 8 Dec 2020 17:23:56 -0500
Subject: [PATCH] wait for serial to init

---
 wiflash_esp32/wiflash_esp32.ino | 1 +
 1 file changed, 1 insertion(+)

diff --git a/wiflash_esp32/wiflash_esp32.ino b/wiflash_esp32/wiflash_esp32.ino
index e50a13d..93f0c30 100644
--- a/wiflash_esp32/wiflash_esp32.ino
+++ b/wiflash_esp32/wiflash_esp32.ino
@@ -102,6 +102,7 @@ uint32_t change_time;    // time of button press (ms)
 */
 void setup() {
   Serial.begin(115200);
+  while (!Serial); // wait for serial attach
 
   Serial.println("Disabling Bluetooth.");
   btStop();