hardwareSerial: add missing include

d-a-v · d-a-v · commit a2efef507957 · 2019-01-21T15:20:07.000+01:00
fix esp8266#5644
diff --git a/cores/esp8266/HardwareSerial.h b/cores/esp8266/HardwareSerial.h
@@ -28,6 +28,7 @@
 #define HardwareSerial_h
 
 #include <inttypes.h>
+#include <time.h>
 #include "Stream.h"
 #include "uart.h"
 
