Add purge instructions

Prior to this commit the README did not include the usecase of a user already having arduino installed. This commit addresses that by including an apt-get purge instruction.
PolySync · Jul 16, 2018 · 010bac4 · 010bac4
1 parent b12b5be
commit 010bac4
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/README.md b/README.md
@@ -70,6 +70,7 @@ sudo apt install build-essential cmake
 
 A manual Arduino install is required since the debian package is older than 1.8.5
 ```
+sudo apt-get purge arduino arduino-core
 wget http://arduino.cc/download.php?f=/arduino-1.8.5-linux64.tar.xz -O arduino-1.8.5.tar.xz
 tar -xf arduino-1.8.5.tar.xz
 cd arduino-1.8.5