From 59cfe4dcd9d42742fb962c1f250ac4d6fc92e6b1 Mon Sep 17 00:00:00 2001
From: PaulStoffregen <paul@pjrc.com>
Date: Wed, 9 Jun 2021 16:46:59 -0700
Subject: [PATCH] Fix implicit declaration compiler warnings / errors

---
 src/libmodbus/modbus.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libmodbus/modbus.c b/src/libmodbus/modbus.c
index af3b240..f7eeddd 100644
--- a/src/libmodbus/modbus.c
+++ b/src/libmodbus/modbus.c
@@ -19,6 +19,7 @@
 #include <unistd.h>
 #endif
 #ifdef ARDUINO
+#include <Arduino.h>
 
 #ifndef DEBUG
 #define printf(...) {}