Method fillRectangle

modules/io/firmata/firmataclient.js:697–699

(color, x, y, width, height)

		return ((r >> 1) << 14) | ((g >> 1) << 7) | (b >> 1);		// RGB 7:7:7
	}
	fillRectangle(color, x, y, width, height) {
		this.#firmata.doPocoFillRectangle(color, x, y, width, height);
	}
	drawPixel(color, x, y) {
		this.#firmata.doPocoDraw(color, x, y);
	}