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Diffstat (limited to 'sensor/patchedBLE/examples/BLE_client')
-rw-r--r-- | sensor/patchedBLE/examples/BLE_client/BLE_client.ino | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/sensor/patchedBLE/examples/BLE_client/BLE_client.ino b/sensor/patchedBLE/examples/BLE_client/BLE_client.ino new file mode 100644 index 0000000..4c58299 --- /dev/null +++ b/sensor/patchedBLE/examples/BLE_client/BLE_client.ino @@ -0,0 +1,160 @@ +/** + * A BLE client example that is rich in capabilities. + * There is a lot new capabilities implemented. + * author unknown + * updated by chegewara + */ + +#include "BLEDevice.h" +//#include "BLEScan.h" + +// The remote service we wish to connect to. +static BLEUUID serviceUUID("4fafc201-1fb5-459e-8fcc-c5c9c331914b"); +// The characteristic of the remote service we are interested in. +static BLEUUID charUUID("beb5483e-36e1-4688-b7f5-ea07361b26a8"); + +static boolean doConnect = false; +static boolean connected = false; +static boolean doScan = false; +static BLERemoteCharacteristic* pRemoteCharacteristic; +static BLEAdvertisedDevice* myDevice; + +static void notifyCallback( + BLERemoteCharacteristic* pBLERemoteCharacteristic, + uint8_t* pData, + size_t length, + bool isNotify) { + Serial.print("Notify callback for characteristic "); + Serial.print(pBLERemoteCharacteristic->getUUID().toString().c_str()); + Serial.print(" of data length "); + Serial.println(length); + Serial.print("data: "); + Serial.println((char*)pData); +} + +class MyClientCallback : public BLEClientCallbacks { + void onConnect(BLEClient* pclient) { + } + + void onDisconnect(BLEClient* pclient) { + connected = false; + Serial.println("onDisconnect"); + } +}; + +bool connectToServer() { + Serial.print("Forming a connection to "); + Serial.println(myDevice->getAddress().toString().c_str()); + + BLEClient* pClient = BLEDevice::createClient(); + Serial.println(" - Created client"); + + pClient->setClientCallbacks(new MyClientCallback()); + + // Connect to the remove BLE Server. + pClient->connect(myDevice); // if you pass BLEAdvertisedDevice instead of address, it will be recognized type of peer device address (public or private) + Serial.println(" - Connected to server"); + + // Obtain a reference to the service we are after in the remote BLE server. + BLERemoteService* pRemoteService = pClient->getService(serviceUUID); + if (pRemoteService == nullptr) { + Serial.print("Failed to find our service UUID: "); + Serial.println(serviceUUID.toString().c_str()); + pClient->disconnect(); + return false; + } + Serial.println(" - Found our service"); + + + // Obtain a reference to the characteristic in the service of the remote BLE server. + pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID); + if (pRemoteCharacteristic == nullptr) { + Serial.print("Failed to find our characteristic UUID: "); + Serial.println(charUUID.toString().c_str()); + pClient->disconnect(); + return false; + } + Serial.println(" - Found our characteristic"); + + // Read the value of the characteristic. + if(pRemoteCharacteristic->canRead()) { + std::string value = pRemoteCharacteristic->readValue(); + Serial.print("The characteristic value was: "); + Serial.println(value.c_str()); + } + + if(pRemoteCharacteristic->canNotify()) + pRemoteCharacteristic->registerForNotify(notifyCallback); + + connected = true; +} +/** + * Scan for BLE servers and find the first one that advertises the service we are looking for. + */ +class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks { + /** + * Called for each advertising BLE server. + */ + void onResult(BLEAdvertisedDevice advertisedDevice) { + Serial.print("BLE Advertised Device found: "); + Serial.println(advertisedDevice.toString().c_str()); + + // We have found a device, let us now see if it contains the service we are looking for. + if (advertisedDevice.haveServiceUUID() && advertisedDevice.isAdvertisingService(serviceUUID)) { + + BLEDevice::getScan()->stop(); + myDevice = new BLEAdvertisedDevice(advertisedDevice); + doConnect = true; + doScan = true; + + } // Found our server + } // onResult +}; // MyAdvertisedDeviceCallbacks + + +void setup() { + Serial.begin(115200); + Serial.println("Starting Arduino BLE Client application..."); + BLEDevice::init(""); + + // Retrieve a Scanner and set the callback we want to use to be informed when we + // have detected a new device. Specify that we want active scanning and start the + // scan to run for 5 seconds. + BLEScan* pBLEScan = BLEDevice::getScan(); + pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks()); + pBLEScan->setInterval(1349); + pBLEScan->setWindow(449); + pBLEScan->setActiveScan(true); + pBLEScan->start(5, false); +} // End of setup. + + +// This is the Arduino main loop function. +void loop() { + + // If the flag "doConnect" is true then we have scanned for and found the desired + // BLE Server with which we wish to connect. Now we connect to it. Once we are + // connected we set the connected flag to be true. + if (doConnect == true) { + if (connectToServer()) { + Serial.println("We are now connected to the BLE Server."); + } else { + Serial.println("We have failed to connect to the server; there is nothin more we will do."); + } + doConnect = false; + } + + // If we are connected to a peer BLE Server, update the characteristic each time we are reached + // with the current time since boot. + if (connected) { + String newValue = "Time since boot: " + String(millis()/1000); + Serial.println("Setting new characteristic value to \"" + newValue + "\""); + + // Set the characteristic's value to be the array of bytes that is actually a string. + pRemoteCharacteristic->writeValue(newValue.c_str(), newValue.length()); + }else if(doScan){ + BLEDevice::getScan()->start(0); // this is just eample to start scan after disconnect, most likely there is better way to do it in arduino + } + + delay(1000); // Delay a second between loops. +} // End of loop |