Update

README.md

@@ -0,0 +1,63 @@
+# Grove
+
+A Microsoft MakeCode package for for Seeed Studio Grove module.
+
+## Basic usage
+
+Grove - Gesture
+```blocks
+// Create gesture events
+grove.onGesture(GroveGesture.Up, () => {
+    basic.showString("Up")
+})
+
+grove.onGesture(GroveGesture.Down, () => {
+    basic.showString("Down")
+})
+```
+
+Grove - Ultrasonic Ranger
+```blocks
+// Measure distance in centimeters, specify the signal pin
+let distance = Grove_Ultrasonic_Ranger.measureInCentimeters(DigitalPin.P0);
+
+// Measure distance in inches, specify the signal pin
+let distance = Grove_Ultrasonic_Ranger.measureInInches(DigitalPin.P0);
+```
+
+Grove - 4 digital display
+```blocks
+// Create a 4 Digital Display driver, specify the clk and data pin
+let display = Grove_4_Digital_Display.create(DigitalPin.P0, DigitalPin.P1);
+
+// Set the brightness level
+display.set(BrightnessLevel.LEVEL_7);
+
+// Start display value
+display.show(1234);
+```
+
+## More operation
+
+Grove - 4 digital display
+```blocks
+// After create a 4 Digital Display driver, it can display number "1234" one by one
+display.bit(0, 1);
+display.bit(1, 2)
+display.bit(2, 3);
+display.bit(3, 4)
+```
+
+Use ``point()`` to open or close point dispay.
+
+Use ``clear()`` to clean display.
+
+## License
+
+MIT
+
+## Supported targets
+
+* for PXT/microbit
+(The metadata above is needed for package search.)
+