flash.py

import sys
import os
import RPi.GPIO as GPIO
import subprocess
from glob import glob
import time

path_to_arduino_cli = "/home/chris/bin/arduino-cli"
path_to_avrdude = "/home/chris/.arduino15/packages/arduino/tools/avrdude/6.3.0-arduino17/bin/avrdude"

#=========================================================

target_path = sys.argv[1]

# Configure GPIO pins
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)

# Delete old compiled sketches
subprocess.run(["rm", "-rf", "/tmp/arduino/sketches/*"])

# Find sketch .ino
ino_file = glob(os.path.join(target_path, "*.ino"))[0]
if not ino_file:
        raise Exception("No .ino file found in "+target_path)
else:
        print("Found sketch .ino "+ino_file)

# Compile sketch to hex
subprocess.run([path_to_arduino_cli, "compile", "-b", "arduino:avr:uno", ino_file])

# Locate hex file
hex_loc = None
compilation_files = glob("/tmp/arduino/sketches/*/*")
for f in compilation_files:
        if ".hex" in f and "bootloader" not in f:
                hex_loc=f

# Bounce Arduino
GPIO.output(4, GPIO.LOW)
time.sleep(1)
GPIO.output(4, GPIO.HIGH)

# Flash Arduino
subprocess.run([path_to_avrdude, "-c", "arduino", "-p", "m328p", "-C", "/home/chris/avrdude.conf", "-U", "flash:w:"+hex_loc])