I'm trying to install the Grbl Controller to run on Alamode connected to the Raspberry Pi 3 Model B wih Raspbian Jessie distro. I followed the tutorial from Wyolum's Alamode User Guide and zapmaker. I am able to upload Blink to Alamode but when I run the following command:

/usr/share/arduino/hardware/tools/avrdude -C /usr/share/arduino/hardware/tools/avrdude.conf -p m328p -b 115200 -c alamode -P /dev/ttyS0 -D -U flash:w:1I8Ey4S -v -v -v -v

I get this error:

avrdude: Version 5.11svn-20111019, compiled on Feb 15 2015 at 18:22:47
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch
System wide configuration file is "/usr/share/arduino/hardware/tools/avrdude.conf"
User configuration file is "/home/pi/.avrduderc"
User configuration file does not exist or is not a regular file, skipping
Using Port : /dev/ttyS0
Using Programmer : alamode
Overriding Baud Rate : 115200
avrdude: Send: 0 [30] [20]
avrdude: Send: 0 [30] [20]
avrdude: Send: 0 [30] [20]
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_recv(): programmer is not responding
avrdude done. Thank you.

Any ideas on how to solve that?
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