ifdef WIFI_SSID
CFLAGS += '-DWIFI_SSID="$(WIFI_SSID)"'
CPPFLAGS += '-DWIFI_SSID="$(WIFI_SSID)"'
endif
ifdef WIFI_PASSWORD
CFLAGS += '-DWIFI_PASSWORD="$(WIFI_PASSWORD)"'
CPPFLAGS += '-DWIFI_PASSWORD="$(WIFI_PASSWORD)"'
endif