sandeepmistry · floe · May 19, 2017 · May 23, 2017 · May 23, 2017 · May 23, 2017
diff --git a/README.md b/README.md
@@ -3,34 +3,12 @@
 [![Build Status](https://travis-ci.org/sandeepmistry/arduino-BLEPeripheral.svg?branch=master)](https://travis-ci.org/sandeepmistry/arduino-BLEPeripheral) [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/sandeepmistry/arduino-BLEPeripheral?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 
-An [Arduino](http://arduino.cc) library for creating custom BLE peripherals with [Nordic Semiconductor](http://www.nordicsemi.com)'s [nRF8001](http://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF8001) or [nR51822](http://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF51822).
+An [Arduino](http://arduino.cc) library for creating custom BLE peripherals and observers with [Nordic Semiconductor](http://www.nordicsemi.com)'s  [nR51822](http://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF51822).
 
-Enables you to create more customized BLE Peripheral's compared to the basic UART most other Arduino BLE libraries provide.
-
-[nRFgo Studio](http://www.nordicsemi.com/chi/node_176/2.4GHz-RF/nRFgo-Studio) (and Windows) is not required when using the [nRF8001](http://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF8001).
+This is heavily based on @sandeepmistry's [arduino-BLEPeripheral](https://github.com/sandeepmistry/arduino-BLEPeripheral) library. This fork adds support for the observer role (i.e. receiving Bluetooth advertisements), but consequently can't support the nRF8001 anymore.
 
 ## Compatible Hardware
 
-### [Nordic Semiconductor nRF8001](http://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF8001)
-
- * [Adafruit](http://www.adafruit.com)
-   * [Bluefruit LE - nRF8001 Breakout](http://www.adafruit.com/products/1697)
- * [RedBearLab](http://redbearlab.com)
-   * [BLE Shield](http://redbearlab.com/bleshield/)
-   * [Blend Micro](http://redbearlab.com/blendmicro/)
-   * [Blend](http://redbearlab.com/blend/)
- * [Femtoduino](http://www.femtoduino.com)
-   * [IMUduino BTLE](http://www.femtoduino.com/spex/imuduino-btle)
- * [Olimex](https://www.olimex.com)
-   * [MOD-nRF8001](https://www.olimex.com/Products/Modules/RF/MOD-nRF8001/)
-   * [OLIMEXINO-NANO-BLE](https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-NANO-BLE/)
- * [Jaycon Systems](http://www.jayconsystems.com)
-   * [nRF8001 Bluetooth Breakout Board](http://www.jayconsystems.com/nrf8001-breakout-board.html)
- * [TinyCircuits](https://www.tiny-circuits.com)
-  * [TinyShield Bluetooth Low Energy - Nordic](https://www.tiny-circuits.com/tiny-shield-bluetooth-low-energy-nordic.html)
-
-**Note:** Does not require use of [nRFgo Studio](http://www.nordicsemi.com/chi/node_176/2.4GHz-RF/nRFgo-Studio)! However, uses more code space.
-
 ### [Nordic Semiconductor nRF51822](http://www.nordicsemi.com/eng/Products/Bluetooth-R-low-energy/nRF51822)
 
  * [RedBearLab](http://redbearlab.com) with [Arduino Add-on](https://github.com/RedBearLab/nRF51822-Arduino)
@@ -44,39 +22,6 @@ Enables you to create more customized BLE Peripheral's compared to the basic UAR
 
  * Various, see [arduino-nRF5 supported boards](https://github.com/sandeepmistry/arduino-nRF5#supported-boards) via [nRF5 Arduino Add-on](https://github.com/sandeepmistry/arduino-nRF5)
 
-#### Pinouts
-
-| Chip | Shield/Board | REQ Pin | RDY Pin | RST Pin |
-| ---- | ------------ | ------- | ------- | ------- |
-| nRF8001|
-| | Bluefruit LE | 10 | 2 | 9 |
-| | BLE Shield 1.x | 9 | 8 | UNUSED |
-| | BLE Shield 2.x | 9 | 8 | UNUSED or 4/7 via jumper|
-| | Blend | 9 | 8 | UNUSED or 4/5 via jumper |
-| | Blend Micro | 6 | 7 | UNUSED or 4 |
-| | IMUduino BTLE | 10 | 7 | 9 |
-| | TinyShield Bluetooth Low Energy | 10 | 2 | 9 |
-| nRF51822 |
-| | RedBearLab nRF51822 | -1 (UNUSED) | -1 (UNUSED) | -1 (UNUSED) |
-| | BLE Nano | -1 (UNUSED) | -1 (UNUSED) | -1 (UNUSED) |
-| | RFduino | -1 (UNUSED) | -1 (UNUSED) | -1 (UNUSED) |
-
-## Compatible IDE's and MCU's
-
- * [Arduino IDE](http://arduino.cc/en/Main/Software#toc1)
-   * AVR (Uno, Lenoardo, Mega, etc.)
-   * SAM3X8E (Due)
-   * SAMD21G18A (Zero)
- * [Teensy](https://www.pjrc.com/teensy/) (via [Teensyduino](https://www.pjrc.com/teensy/td_download.html))
-   * 2.0
-   * 3.0
-   * 3.1
-   * LC
-
-**Warning**: For more advanced sketches an MCU with more than 2kB of RAM and 32kB of flash space is recommended. Advance sketches include:
- * Multiple services and characteristics
- * HID API usage
-
 ## Usage
 
 ### Download Library
@@ -86,20 +31,20 @@ Enables you to create more customized BLE Peripheral's compared to the basic UAR
 #### Using the Arduino IDE Library Manager
 
 1. Choose ```Sketch``` -> ```Include Library``` -> ```Manage Libraries...```
-2. Type ```BLEPeripheral``` into the search box.
+2. Type ```BLEPeripheralObserver``` into the search box.
 3. Click the row to select the library.
 4. Click the ```Install``` button to install the library.
 
 #### Using Git
 ```sh
 cd ~/Documents/Arduino/libraries/
-git clone https://github.com/sandeepmistry/arduino-BLEPeripheral BLEPeripheral
+git clone https://github.com/floe/BLEPeripheralObserver BLEPeripheralObserver
 ```
 
 #### MPIDE
 ```
 cd ~/Documents/mpide/libraries/
-git clone https://github.com/sandeepmistry/arduino-BLEPeripheral BLEPeripheral
+git clone https://github.com/floe/BLEPeripheralObserver BLEPeripheralObserver
 ```
 
 ### [arduino-nRF5x core](https://github.com/sandeepmistry/arduino-nRF5) users
@@ -120,15 +65,3 @@ See [examples](examples) folder.
 ## License
 
 This libary is [licensed](LICENSE) under the [MIT Licence](http://en.wikipedia.org/wiki/MIT_License).
-
-## Useful Links
- * [@lizardo](https://github.com/lizardo)'s [nRF8001 Experiments](https://github.com/lizardo/nrf8001)
-   * used as a starting point to reverse engineer the proprietary setup message format for the chips
- * [@NordicSemiconductor](https://github.com/NordicSemiconductor)'s [ble-sdk-arduino](https://github.com/NordicSemiconductor/ble-sdk-arduino)
-   * Original Arduino SDK for nRF8001
- * [@guanix](https://github.com/guanix)'s [arduino-nrf8001](https://github.com/guanix/arduino-nrf8001)
-   * nRF8001 support for Arduino
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-56089547-1/sandeepmistry/arduino-BLEPeripheral?pixel)](https://github.com/igrigorik/ga-beacon)
-
diff --git a/examples/observer/observer.ino b/examples/observer/observer.ino
@@ -0,0 +1,60 @@
+// Copyright (c) Sandeep Mistry. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#define NRF51
+#undef __RFduino__
+// Import libraries (BLEPeripheral depends on SPI)
+#include <SPI.h>
+#include <BLEPeripheral.h>
+#include <BLEUtil.h>
+#include <ble_gap.h>
+
+//custom boards may override default pin definitions with BLEPeripheral(PIN_REQ, PIN_RDY, PIN_RST)
+BLEPeripheral                    blePeripheral                            = BLEPeripheral();
+
+void setup() {
+  Serial.begin(115200);
+#if defined (__AVR_ATmega32U4__)
+  delay(5000);  //5 seconds delay for enabling to see the start up comments on the serial board
+#endif
+
+  blePeripheral.setLocalName("foobaz"); // optional
+
+  blePeripheral.setEventHandler(BLEAddressReceived, addrHandler);
+  blePeripheral.setEventHandler(BLEAdvertisementReceived, advHandler);
+
+  // begin initialization
+  blePeripheral.begin();
+  blePeripheral.setConnectable(false);
+  blePeripheral.setAdvertisingInterval(500);
+  blePeripheral.startAdvertising();
+}
+
+void addrHandler(const void* _addr) {
+  unsigned char* addr = (unsigned char*)_addr;
+  char address[18];
+  BLEUtil::addressToString(addr, address);
+  Serial.print(F("Got own addr: "));
+  Serial.println(address);
+}
+
+void advHandler(const void* adv) {
+  ble_gap_evt_adv_report_t* report = (ble_gap_evt_adv_report_t*)adv;
+  char address[18];
+  BLEUtil::addressToString(report->peer_addr.addr, address);
+  Serial.print(F("Evt Adv Report from "));
+  Serial.println(address);
+  Serial.print(F("got adv with payload "));
+  Serial.println(report->dlen);
+}
+
+void loop() {
+  if (Serial.available() > 0) {
+    Serial.read();
+    Serial.println("start scanning");
+    blePeripheral.startScanning();
+    blePeripheral.setLocalName("foobarg"); // optional
+    blePeripheral.startAdvertising();
+  }
+  blePeripheral.poll();
+}
diff --git a/library.json b/library.json
@@ -1,13 +1,13 @@
 {
-  "name": "BLEPeripheral",
+  "name": "BLEPeripheralObserver",
   "version": "0.4.0",
-  "keywords": "BLE, bluetooth, peripheral",
-  "description": "Arduino library for creating custom BLE peripherals. Supports nRF8001 and nRF51822 based boards/shields.",
+  "keywords": "BLE, bluetooth, peripheral, observer",
+  "description": "Arduino library for creating custom BLE peripherals. Supports nRF51 based boards.",
   "repository":
   {
     "type": "git",
-    "url": "https://github.com/sandeepmistry/arduino-BLEPeripheral.git"
+    "url": "https://github.com/floe/BLEPeripheralObserver.git"
   },
   "frameworks": "arduino",
-  "platforms": "nordicnrf51, atmelavr, atmelsam, teensy"
+  "platforms": "nordicnrf51"
 }
diff --git a/library.properties b/library.properties
@@ -1,10 +1,10 @@
-name=BLEPeripheral
+name=BLEPeripheralObserver
 version=0.4.0
-author=Sandeep Mistry <[email protected]>
-maintainer=Sandeep Mistry <[email protected]>
-sentence=An Arduino library for creating custom BLE peripherals.
-paragraph=Supports nRF8001 and nRF51822 based boards/shields
+author=Sandeep Mistry <[email protected]>, Florian Echtler <[email protected]>
+maintainer=Florian Echtler <[email protected]>
+sentence=An Arduino library for creating custom BLE peripherals and observers.
+paragraph=Supports nRF51 and nRF52 based boards
 category=Communication
-url=https://github.com/sandeepmistry/arduino-BLEPeripheral
+url=https://github.com/floe/BLEPeripheralObserver
 architectures=*
-includes=BLEPeripheral.h
+includes=BLEPeripheralObserver.h
diff --git a/src/BLEDevice.h b/src/BLEDevice.h
@@ -37,6 +37,7 @@ class BLEDeviceEventListener
     virtual void BLEDeviceAddressReceived(BLEDevice& /*device*/, const unsigned char* /*address*/) { }
     virtual void BLEDeviceTemperatureReceived(BLEDevice& /*device*/, float /*temperature*/) { }
     virtual void BLEDeviceBatteryLevelReceived(BLEDevice& /*device*/, float /*batteryLevel*/) { }
+    virtual void BLEDeviceAdvertisementReceived(BLEDevice& /*device*/, const unsigned char* /*advertisement*/) { }
 };
 
 
@@ -65,13 +66,21 @@ class BLEDevice
                 BLERemoteAttribute** /*remoteAttributes*/,
                 unsigned char /*numRemoteAttributes*/) { }
 
+    virtual void updateAdvertisementData(unsigned char /*advertisementDataSize*/,
+                BLEEirData * /*advertisementData*/,
+                unsigned char /*scanDataSize*/,
+                BLEEirData * /*scanData*/) { }
+
     virtual void poll() { }
 
     virtual void end() { }
 
     virtual bool setTxPower(int /*txPower*/) { return false; }
 
     virtual void startAdvertising() { }
+    virtual void stopAdvertising() { }
+    virtual void startScanning() { }
+    virtual void stopScanning() { }
     virtual void disconnect() { }
 
     virtual bool updateCharacteristicValue(BLECharacteristic& /*characteristic*/) { return false; }

diff --git a/src/BLEPeripheral.cpp b/src/BLEPeripheral.cpp
@@ -49,6 +49,7 @@ BLEPeripheral::BLEPeripheral(unsigned char req, unsigned char rdy, unsigned char
 #endif
 
   memset(this->_eventHandlers, 0x00, sizeof(this->_eventHandlers));
+  memset(this->_deviceEvents,  0x00, sizeof(this->_deviceEvents));
 
   this->setDeviceName(DEFAULT_DEVICE_NAME);
   this->setAppearance(DEFAULT_APPEARANCE);
@@ -68,12 +69,9 @@ BLEPeripheral::~BLEPeripheral() {
   }
 }
 
-void BLEPeripheral::begin() {
+unsigned char BLEPeripheral::updateAdvertismentData() {
   unsigned char advertisementDataSize = 0;
 
-  BLEEirData advertisementData[3];
-  BLEEirData scanData;
-
   scanData.length = 0;
 
   unsigned char remainingAdvertisementDataLength = BLE_ADVERTISEMENT_DATA_MAX_VALUE_LENGTH + 2;
@@ -131,6 +129,11 @@ void BLEPeripheral::begin() {
     memcpy(scanData.data, this->_localName, scanData.length);
   }
 
+  return advertisementDataSize;
+}
+
+void BLEPeripheral::begin() {
+
   if (this->_localAttributes == NULL) {
     this->initLocalAttributes();
   }
@@ -158,6 +161,7 @@ void BLEPeripheral::begin() {
     this->addRemoteAttribute(this->_remoteServicesChangedCharacteristic);
   }
 
+  int advertisementDataSize = updateAdvertismentData();
   this->_device->begin(advertisementDataSize, advertisementData,
                         scanData.length > 0 ? 1 : 0, &scanData,
                         this->_localAttributes, this->_numLocalAttributes,
@@ -203,6 +207,26 @@ void BLEPeripheral::setBondStore(BLEBondStore& bondStore) {
   this->_device->setBondStore(bondStore);
 }
 
+void BLEPeripheral::startAdvertising() {
+  int advertisementDataSize = updateAdvertismentData();
+  this->_device->updateAdvertisementData(
+      advertisementDataSize, advertisementData,
+      scanData.length > 0 ? 1 : 0, &scanData);
+  this->_device->startAdvertising();
+}
+
+void BLEPeripheral::stopAdvertising() {
+  this->_device->stopAdvertising();
+}
+
+void BLEPeripheral::startScanning() {
+  this->_device->startScanning();
+}
+
+void BLEPeripheral::stopScanning() {
+  this->_device->stopScanning();
+}
+
 void BLEPeripheral::setDeviceName(const char* deviceName) {
   this->_deviceNameCharacteristic.setValue(deviceName);
 }
@@ -263,6 +287,12 @@ void BLEPeripheral::setEventHandler(BLEPeripheralEvent event, BLEPeripheralEvent
   }
 }
 
+void BLEPeripheral::setEventHandler(BLEDeviceEvent event, BLEDeviceEventHandler eventHandler) {
+  if (event < sizeof(this->_deviceEvents)) {
+    this->_deviceEvents[event] = eventHandler;
+  }
+}
+
 bool BLEPeripheral::characteristicValueChanged(BLECharacteristic& characteristic) {
   return this->_device->updateCharacteristicValue(characteristic);
 }
@@ -375,7 +405,7 @@ void BLEPeripheral::BLEDeviceRemoteCharacteristicValueChanged(BLEDevice& /*devic
   remoteCharacteristic.setValue(this->_central, value, valueLength);
 }
 
-void BLEPeripheral::BLEDeviceAddressReceived(BLEDevice& /*device*/, const unsigned char* /*address*/) {
+void BLEPeripheral::BLEDeviceAddressReceived(BLEDevice& device, const unsigned char* address) {
 #ifdef BLE_PERIPHERAL_DEBUG
   char addressStr[18];
 
@@ -384,12 +414,31 @@ void BLEPeripheral::BLEDeviceAddressReceived(BLEDevice& /*device*/, const unsign
   Serial.print(F("Peripheral address: "));
   Serial.println(addressStr);
 #endif
+  BLEDeviceEventHandler eventHandler = this->_deviceEvents[BLEAddressReceived];
+  if (eventHandler) {
+    eventHandler(address);
+  }
 }
 
-void BLEPeripheral::BLEDeviceTemperatureReceived(BLEDevice& /*device*/, float /*temperature*/) {
+void BLEPeripheral::BLEDeviceTemperatureReceived(BLEDevice& device, float temperature) {
+  BLEDeviceEventHandler eventHandler = this->_deviceEvents[BLETemperatureReceived];
+  if (eventHandler) {
+    eventHandler(&temperature);
+  }
 }
 
-void BLEPeripheral::BLEDeviceBatteryLevelReceived(BLEDevice& /*device*/, float /*batteryLevel*/) {
+void BLEPeripheral::BLEDeviceBatteryLevelReceived(BLEDevice& device, float batteryLevel) {
+  BLEDeviceEventHandler eventHandler = this->_deviceEvents[BLEBatteryLevelReceived];
+  if (eventHandler) {
+    eventHandler(&batteryLevel);
+  }
+}
+
+void BLEPeripheral::BLEDeviceAdvertisementReceived(BLEDevice& device, const unsigned char* advertisement) {
+  BLEDeviceEventHandler eventHandler = this->_deviceEvents[BLEAdvertisementReceived];
+  if (eventHandler) {
+    eventHandler(advertisement);
+  }
 }
 
 void BLEPeripheral::initLocalAttributes() {