diff --git a/Makefile b/Makefile
index 7de24a3b..a16f85ce 100644
--- a/Makefile
+++ b/Makefile
@@ -75,7 +75,7 @@ else
     endif
 endif
 #############################################################
-ESPTOOL ?= ../tools/esptool.py
+ESPTOOL ?= ../tools/esptool.sh
 
 
 CSRCS ?= $(wildcard *.c)
diff --git a/tools/esptool.sh b/tools/esptool.sh
new file mode 100755
index 00000000..dcbfa449
--- /dev/null
+++ b/tools/esptool.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+ret=`python -c 'import sys; print("%i" % (sys.hexversion<0x03000000))'`
+if [ $ret -eq 0 ]; then
+    #Retry python 2
+	ret=`python2 -c 'import sys; print("%i" % (sys.hexversion<0x03000000))'`
+	if [ $ret -eq 0 ]; then
+	    echo "Cannot find python2."
+	else 
+	    #Ok
+		python2 esptool.py $@
+	fi
+else 
+    #Ok
+	python esptool.py $@
+fi
\ No newline at end of file