public function getGPIOPins()
	{
		if(true === in_array($this->revision, ['a01041', 'a21041', 'a22042'], true)) {
			// Pi 2 revs
			return range(2, 27);
		}

		if(true === in_array($this->revision, ['a02082', 'a22082', 'a32082'], true)) {
			// Pi 3 revs
			return range(2, 27);
		}

		// Pi 1 revs
		return [0, 1, 4, 7, 8, 9, 10, 11, 14, 15, 17, 18, 21, 22, 23, 25];
	}