From 642be1c0c22fa098bc3d5a4d719f778bc2955cec Mon Sep 17 00:00:00 2001
From: agdl <a.guadalupi@arduino.cc>
Date: Thu, 18 Oct 2018 23:33:02 +0200
Subject: [PATCH] Improved baud rate settings formula

---
 cores/arduino/UART.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cores/arduino/UART.cpp b/cores/arduino/UART.cpp
index c8ef04dea..727ffc81c 100644
--- a/cores/arduino/UART.cpp
+++ b/cores/arduino/UART.cpp
@@ -197,7 +197,7 @@ void UartClass::begin(unsigned long baud, uint16_t config)
 
         int8_t sigrow_val = SIGROW.OSC16ERR5V;
         baud_setting *= (1024 + sigrow_val);
-        baud_setting /= 1024;
+        baud_setting /= (1024 - sigrow_val);
 
         // assign the baud_setting, a.k.a. BAUD (USART Baud Rate Register)
         (*_hwserial_module).BAUD = (int16_t) baud_setting;