moving into separate project

libs/ultrasonic-sensor/README.md

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+# Touch sensor
+
+The library to interact with the Touch Sensor.

libs/ultrasonic-sensor/_locales/ultrasonic-sensor-jsdoc-strings.json

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+{
+  "sensors.UltraSonicSensor.distance": "Gets the distance from the sonar in millimeters",
+  "sensors.UltraSonicSensor.onEvent": "Registers code to run when the given color is close",
+  "sensors.UltraSonicSensor.onEvent|param|handler": "the code to run when detected",
+  "sensors.UltraSonicSensor.waitUntil": "Waits for the event to occur"
+}

libs/ultrasonic-sensor/_locales/ultrasonic-sensor-strings.json

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+{
+  "UltrasonicSensorEvent.ObjectDetected|block": "object detected",
+  "UltrasonicSensorEvent.ObjectNear|block": "object near",
+  "sensors.UltraSonicSensor.distance|block": "`icons.ultrasonicSensor` %sensor|distance",
+  "sensors.UltraSonicSensor.onEvent|block": "on `icons.ultrasonicSensor` %sensor|%event",
+  "sensors.UltraSonicSensor.waitUntil|block": "wait `icons.ultrasonicSensor` %sensor|until %event",
+  "sensors.ultrasonic1|block": "1",
+  "sensors.ultrasonic2|block": "2",
+  "sensors.ultrasonic3|block": "3",
+  "sensors.ultrasonic4|block": "4",
+  "{id:category}Sensors": "Sensors",
+  "{id:group}Ultrasonic Sensor": "Ultrasonic Sensor"
+}

libs/ultrasonic-sensor/pxt.json

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+{
+    "name": "ultrasonic-sensor",
+    "description": "Ultrasonic Sensor support",
+    "files": [
+        "README.md",
+        "ultrasonic.ts"
+    ],
+    "testFiles": [
+        "test.ts"
+    ],
+    "public": true,
+    "dependencies": {
+            "core": "file:../core"
+    }
+}

libs/ultrasonic-sensor/ultrasonic.ts

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+enum UltrasonicSensorEvent {
+    //% block="object detected"
+    ObjectDetected = 10,
+    //% block="object near"
+    ObjectNear = sensors.internal.ThresholdState.Low,
+    //% block="object far"
+    ObjectFar = sensors.internal.ThresholdState.High
+}
+
+namespace sensors {
+
+    //% fixedInstances
+    export class UltraSonicSensor extends internal.UartSensor {
+        private promixityThreshold: sensors.internal.ThresholdDetector;
+        private movementThreshold: number;
+
+        constructor(port: number) {
+            super(port)
+            this.promixityThreshold = new sensors.internal.ThresholdDetector(this.id(), 0, 255, 10, 100); // range is 0..255cm
+            this.movementThreshold = 1;
+        }
+
+        _deviceType() {
+            return DAL.DEVICE_TYPE_ULTRASONIC
+        }
+
+        _query(): number {
+            return this.getNumber(NumberFormat.UInt16LE, 0) & 0x0fff;            
+        }
+
+        _update(prev: number, curr: number) {
+            // is there an object near?
+            this.promixityThreshold.setLevel(curr);
+
+            // did something change?
+            if (Math.abs(prev - curr) > this.movementThreshold)
+                control.raiseEvent(this._id, UltrasonicSensorEvent.ObjectDetected);
+        }
+
+        /**
+         * Registers code to run when the given color is close
+         * @param handler the code to run when detected
+         */
+        //% help=input/ultrasonic/on
+        //% blockId=ultrasonicOn
+        //% block="on `icons.ultrasonicSensor` %sensor|%event"
+        //% parts="ultrasonicsensor"
+        //% blockNamespace=sensors
+        //% weight=100 blockGap=8
+        //% group="Ultrasonic Sensor"
+        onEvent(event: UltrasonicSensorEvent, handler: () => void) {
+            control.onEvent(this._id, event, handler);
+        }
+
+        /**
+         * Waits for the event to occur
+         */
+        //% help=input/ultrasonic/wait
+        //% block="wait `icons.ultrasonicSensor` %sensor|until %event"
+        //% blockId=ultrasonicWait
+        //% parts="ultrasonicsensor"
+        //% blockNamespace=sensors
+        //% weight=99 blockGap=8
+        //% group="Ultrasonic Sensor"        
+        waitUntil(event: UltrasonicSensorEvent) {
+            control.waitForEvent(this._id, event);
+        }
+
+        /**
+         * Gets the distance from the sonar in millimeters
+         * @param sensor the ultrasonic sensor port
+         */
+        //% help=input/ultrasonic/distance
+        //% block="`icons.ultrasonicSensor` %sensor|distance"
+        //% blockId=sonarGetDistance
+        //% parts="ultrasonicsensor"
+        //% blockNamespace=sensors
+        //% weight=65 blockGap=8   
+        //% group="Ultrasonic Sensor"     
+        distance(): number {
+            // it supposedly also has an inch mode, but we stick to cm
+            this._setMode(0)
+            return this.getNumber(NumberFormat.UInt16LE, 0) & 0x0fff; // range is 0..255
+        }
+    }
+    
+    //% fixedInstance whenUsed block="1"
+    export const ultrasonic1: UltraSonicSensor = new UltraSonicSensor(1)
+    
+    //% fixedInstance whenUsed block="4"
+    export const ultrasonic4: UltraSonicSensor = new UltraSonicSensor(4)
+
+    //% fixedInstance whenUsed block="2"
+    export const ultrasonic2: UltraSonicSensor = new UltraSonicSensor(2)
+
+    //% fixedInstance whenUsed block="3"
+    export const ultrasonic3: UltraSonicSensor = new UltraSonicSensor(3)
+}