remove duplicate code to open file to write on flash #540

	name: CI

	on:
	push:

	pull_request:

	env:
	ARDUINO_LIBRARY_ENABLE_UNSAFE_INSTALL: false

	jobs:
	ci:
	name: ${{ matrix.hwVersion }}
	runs-on: ubuntu-latest
	strategy:
	matrix:
	hwVersion: [HW5, HW4, HW3, HW2, HW1]

	steps:
	- name: Install Arduino CLI
	uses: arduino/setup-arduino-cli@v1

	- name: Install platform
	run: \|
	arduino-cli core update-index
	arduino-cli core install arduino:avr

	- name: Install libraries
	run: \|
	arduino-cli lib install \
	"SdFat" \
	"Adafruit SSD1306" \
	"Adafruit GFX Library" \
	"Adafruit BusIO" \
	"U8g2" \
	"Adafruit NeoPixel" \
	"RotaryEncoder" \
	"Etherkit Si5351" \
	"RTClib" \
	"FreqCount"

	- name: Checkout
	uses: actions/checkout@v3

	- name: Compile
	run: \|
	cd Cart_Reader/
	# Select hardware version by uncommenting it (using regular expression)
	sed -i 's/^\/\/[\t ]*#define ${{ matrix.hwVersion }}/#define ${{ matrix.hwVersion }}/g' Config.h
	arduino-cli compile --fqbn arduino:avr:mega --warnings all

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