AVR=/home/pi/arduino-1.8.12
AHOME=/home/pi/.arduino15

$AVR/hardware/tools/avr/bin/avrdude -C$AVR/hardware/tools/avr/etc/avrdude.conf -q -q -patmega328p -carduino -P/dev/ttyACM0 -b115200 -D -Uflash:w:/tmp/arduino/firmware-next.ino.hex