Add BLE central to test BLE.setservice (#969)

It is a BLE central source to verify BLE pheripheral API.
This is simplified from pizza example's central in noble module.

How to test:

- Copy test_ble_setservices_central.js to {noble_root}/examples/pizza
- Run test_ble_setservices.js using iotjs.
- Run test_ble_setservices_central.js with node after installing noble.
- "Hello BLE Service" should be printed on success.

IoT.js-DCO-1.0-Signed-off-by: Sanggyu Lee [email protected]

Author: Sanggyu Lee

test/run_pass/test_ble_setservices_central.js

@@ -0,0 +1,132 @@
+/* Copyright 2017-present Samsung Electronics Co., Ltd. and other contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Copyright (C) 2015 Sandeep Mistry [email protected]
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+var noble = require('../..');
+
+var echoServiceUuid = 'ec00';
+var echoCharacteristicUuid = 'ec0e';
+
+noble.on('stateChange', function(state) {
+  if (state === 'poweredOn') {
+    //
+    // Once the BLE radio has been powered on, it is possible
+    // to begin scanning for services. Pass an empty array to
+    // scan for all services (uses more time and power).
+    //
+    console.log('scanning...');
+    noble.startScanning([echoServiceUuid], false);
+  }
+  else {
+    noble.stopScanning();
+  }
+})
+
+var echoService = null;
+var echoCharacteristic = null;
+
+noble.on('discover', function(peripheral) {
+  // we found a peripheral, stop scanning
+  noble.stopScanning();
+
+  //
+  // The advertisment data contains a name, power level (if available),
+  // certain advertised service uuids, as well as manufacturer data,
+  // which could be formatted as an iBeacon.
+  //
+  console.log('found peripheral:', peripheral.advertisement);
+  //
+  // Once the peripheral has been discovered, then connect to it.
+  // It can also be constructed if the uuid is already known.
+  ///
+  peripheral.connect(function(err) {
+    //
+    // Once the peripheral has been connected, then discover the
+    // services and characteristics of interest.
+    //
+    peripheral.discoverServices([echoServiceUuid], function(err, services) {
+      services.forEach(function(service) {
+        //
+        // This must be the service we were looking for.
+        //
+        console.log('found service:', service.uuid);
+
+        //
+        // So, discover its characteristics.
+        //
+        service.discoverCharacteristics([], function(err, characteristics) {
+
+          characteristics.forEach(function(characteristic) {
+            //
+            // Loop through each characteristic and match them to the
+            // UUIDs that we know about.
+            //
+            console.log('found characteristic:', characteristic.uuid);
+
+            if (echoCharacteristicUuid == characteristic.uuid) {
+              echoCharacteristic = characteristic;
+            }
+          })
+
+          //
+          // Check to see if we found all of our characteristics.
+          //
+          if (echoCharacteristic) {
+            bakePizza();
+          }
+          else {
+            console.log('missing characteristics');
+          }
+        })
+      })
+    })
+  })
+})
+
+function bakePizza() {
+  var crust = new Buffer("Hello BLE Service.");
+  echoCharacteristic.write(crust, false, function(err) {
+    if (!err) {
+      echoCharacteristic.read(function (err, buffer) {
+        if (!err) {
+          console.log('BLE says' + buffer.toString());
+        }
+      });
+    }
+    else {
+      console.log('crust error');
+    }
+  })
+}

test/testsets.json

@@ -4,6 +4,7 @@
     { "name": "test_assert.js" },
     { "name": "test_ble_advertisement.js", "skip": ["all"], "reason": "need to setup test environment" },
     { "name": "test_ble_setservices.js", "skip": ["all"], "reason": "need to setup test environment" },
+    { "name": "test_ble_setservices_central.js", "skip": ["all"], "reason": "run it with nodejs after running test_ble_setservices.js" },
     { "name": "test_buffer_builtin.js" },
     { "name": "test_buffer.js" },
     { "name": "test_console.js" },