HCSR04 Ultrasonic sensor exposed over BLE

Dependencies:   BLE_API HCSR04 mbed nRF51822

Revision:
0:470a1164da56
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/UltrasonicService.h	Mon May 09 10:26:40 2016 +0000
@@ -0,0 +1,43 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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.
+ */
+ 
+#ifndef __BLE_ULTRA_SERVICE_H__
+#define __BLE_ULTRA_SERVICE_H__
+ 
+class UltrasonicService {
+public:
+    const static uint16_t SERVICE_UUID              = 0xA998;
+    const static uint16_t STATE_CHARACTERISTIC_UUID = 0xA999;
+ 
+    UltrasonicService(BLE &_ble) :
+        ble(_ble), state(STATE_CHARACTERISTIC_UUID, 0, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY)
+    {
+        GattCharacteristic *charTable[] = {&state};
+        GattService         service(UltrasonicService::SERVICE_UUID, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
+        ble.gattServer().addService(service);
+    }
+ 
+    void updateState(uint32_t newState) {
+        ble.gattServer().write(state.getValueHandle(), (uint8_t *)&newState, sizeof(uint32_t));
+    }
+ 
+private:
+    BLE                                     &ble;
+    ReadOnlyGattCharacteristic<uint32_t>    state;
+};
+ 
+#endif /* #ifndef __BLE_ULTRA_SERVICE_H__ */
+ 
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