Enhance checkConnection() function (#240) #98

Job	Run time
build (adafruit_qtpy_rp2040) / build	1m 13s
build (adafruit_itsybitsy_rp2040) / build	1m 32s
build (adafruit_feather_rp2040) / build	1m 1s
build (pico) / build	1m 41s
build (arduino_nano_rp2040_connect) / build	56s
build (pimoroni_pga2040) / build	1m 29s
build (pimoroni_picolipo_16mb) / build	1m 4s
build (pimoroni_picolipo_4mb) / build	59s
build (pimoroni_tiny2040) / build	1m 20s
build (sparkfun_micromod) / build	58s
build (sparkfun_promicro) / build	1m 8s
build (sparkfun_thingplus) / build	1m 20s
	14m 41s

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