From 1590ec297dc9faf34541f299358edfb935bfc003 Mon Sep 17 00:00:00 2001
From: Jonathan Roeber <r734@fastmail.com>
Date: Sat, 29 Sep 2018 16:23:43 -0400
Subject: [PATCH] fix #23 with ifdef check

---
 Adafruit_Thermal.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Adafruit_Thermal.cpp b/Adafruit_Thermal.cpp
index cd84653..4ce4417 100644
--- a/Adafruit_Thermal.cpp
+++ b/Adafruit_Thermal.cpp
@@ -65,11 +65,19 @@ void Adafruit_Thermal::timeoutSet(unsigned long x) {
 
 // This function waits (if necessary) for the prior task to complete.
 void Adafruit_Thermal::timeoutWait() {
+#ifdef ESP8266
+  if(dtrEnabled) {
+    while(digitalRead(dtrPin) == HIGH){yield();};
+  } else {
+    while((long)(micros() - resumeTime) < 0L){yield();}; // (syntax is rollover-proof)
+  }
+#else
   if(dtrEnabled) {
     while(digitalRead(dtrPin) == HIGH);
   } else {
     while((long)(micros() - resumeTime) < 0L); // (syntax is rollover-proof)
   }
+#endif
 }
 
 // Printer performance may vary based on the power supply voltage,