Reading characteristic values inside BLE_client notifyCallback
Posted: Wed Jan 10, 2018 10:15 am
I have two Adafruit Huzzah32 Feather boards with ESP32 modules on them. I want to connect both of them, one as a server sending data via notifications, the other one as a client receiving all changed values.
Code for server (I changed the BLE_uart example a little):
Code for client (made some changes to BLE_client example):
I am able to read the characteristic value the first time outside of the callback, but when I try to read it inside nothing happens afterwards.
This is the log of the server:
As you can see the response value is wrong and after the first send there happens much less. The server continues to send notifications but the log is the same as for value 51.
Code for server (I changed the BLE_uart example a little):
Code: Select all
/*
Video: https://www.youtube.com/watch?v=oCMOYS71NIU
Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp
Ported to Arduino ESP32 by Evandro Copercini
Create a BLE server that, once we receive a connection, will send periodic notifications.
The service advertises itself as: 6E400001-B5A3-F393-E0A9-E50E24DCCA9E
Has a characteristic of: 6E400002-B5A3-F393-E0A9-E50E24DCCA9E - used for receiving data with "WRITE"
Has a characteristic of: 6E400003-B5A3-F393-E0A9-E50E24DCCA9E - used to send data with "NOTIFY"
The design of creating the BLE server is:
1. Create a BLE Server
2. Create a BLE Service
3. Create a BLE Characteristic on the Service
4. Create a BLE Descriptor on the characteristic
5. Start the service.
6. Start advertising.
In this example rxValue is the data received (only accessible inside that function).
And txValue is the data to be sent, in this example just a byte incremented every second.
*/
#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
BLECharacteristic *pCharacteristic;
bool deviceConnected = false;
uint8_t txValue = 50;
// See the following for generating UUIDs:
// https://www.uuidgenerator.net/
#define SERVICE_UUID "6E400001-B5A3-F393-E0A9-E50E24DCCA9E" // UART service UUID
#define CHARACTERISTIC_UUID_RX "6E400002-B5A3-F393-E0A9-E50E24DCCA9E"
#define CHARACTERISTIC_UUID_TX "6E400003-B5A3-F393-E0A9-E50E24DCCA9E"
class MyServerCallbacks: public BLEServerCallbacks {
void onConnect(BLEServer* pServer) {
deviceConnected = true;
};
void onDisconnect(BLEServer* pServer) {
deviceConnected = false;
}
};
class MyCallbacks: public BLECharacteristicCallbacks {
void onWrite(BLECharacteristic *pCharacteristic) {
std::string rxValue = pCharacteristic->getValue();
if (rxValue.length() > 0) {
Serial.println("*********");
Serial.print("Received Value: ");
for (int i = 0; i < rxValue.length(); i++)
Serial.print(rxValue[i]);
Serial.println();
Serial.println("*********");
}
}
};
void setup() {
Serial.begin(115200);
// Create the BLE Device
BLEDevice::init("UART"); // Name must not be longer than 5 chars!!!
// Create the BLE Server
BLEServer *pServer = BLEDevice::createServer();
pServer->setCallbacks(new MyServerCallbacks());
// Create the BLE Service
BLEService *pService = pServer->createService(SERVICE_UUID);
// Create a BLE Characteristic
pCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID_TX,
BLECharacteristic::PROPERTY_NOTIFY|BLECharacteristic::PROPERTY_READ|BLECharacteristic::PROPERTY_WRITE
);
BLE2902 *desc = new BLE2902();
desc->setNotifications(true);
pCharacteristic->addDescriptor(desc);
BLECharacteristic *pCharacteristic = pService->createCharacteristic(
CHARACTERISTIC_UUID_RX,
BLECharacteristic::PROPERTY_WRITE
);
pCharacteristic->setReadProperty(true);
pCharacteristic->setCallbacks(new MyCallbacks());
// Start the service
pService->start();
pServer->getAdvertising()->addServiceUUID(SERVICE_UUID);
// Start advertising
pServer->getAdvertising()->start();
Serial.println(pService->getUUID().toString().c_str());
Serial.println("Waiting a client connection to notify...");
}
void loop() {
if (deviceConnected) {
Serial.printf("*** Sent Value: %d ***\n", txValue);
//pCharacteristic->setValue(&txValue, 1);
pCharacteristic->setValue("Hi");
pCharacteristic->notify();
txValue++;
}
delay(1000);
}Code: Select all
/**
* A BLE client example that is rich in capabilities.
*/
#include "BLEDevice.h"
//#include "BLEScan.h"
// The remote service we wish to connect to.
static BLEUUID serviceUUID("6E400001-B5A3-F393-E0A9-E50E24DCCA9E");
// The characteristic of the remote service we are interested in.
static BLEUUID charUUID("6E400003-B5A3-F393-E0A9-E50E24DCCA9E");
static BLEAddress *pServerAddress;
static boolean doConnect = false;
static boolean connected = false;
static BLERemoteCharacteristic* pRemoteCharacteristic;
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);
std::string value = pBLERemoteCharacteristic->readValue();
//Serial.println(pBLERemoteCharacteristic->readValue().c_str());
}
bool connectToServer(BLEAddress pAddress) {
Serial.print("Forming a connection to ");
Serial.println(pAddress.toString().c_str());
BLEClient* pClient = BLEDevice::createClient();
Serial.println(" - Created client");
// Connect to the remove BLE Server.
pClient->connect(pAddress);
Serial.println(" - Connected to server");
// Obtain a reference to the service we are after in the remote BLE server.
BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
Serial.println(pRemoteService->toString().c_str());
if (pRemoteService == nullptr) {
Serial.print("Failed to find our service UUID: ");
Serial.println(serviceUUID.toString().c_str());
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());
return false;
}
Serial.println(" - Found our characteristic");
// Read the value of the characteristic.
Serial.print("The characteristic value was: ");
//std::string value = pRemoteCharacteristic->readValue(); // Funny thing: with this version the value "hi" is not displayed
//Serial.println(value.c_str());
Serial.println(pRemoteCharacteristic->readValue().c_str()); // But with this version it is ?!
pRemoteCharacteristic->registerForNotify(notifyCallback);
}
/**
* 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());
//Serial.print(advertisedDevice.haveServiceUUID());
if(advertisedDevice.haveServiceUUID()){
Serial.println(advertisedDevice.getServiceUUID().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.getServiceUUID().equals(serviceUUID)) {
//
Serial.print("Found our device! address: ");
advertisedDevice.getScan()->stop();
pServerAddress = new BLEAddress(advertisedDevice.getAddress());
doConnect = 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 30 seconds.
BLEScan* pBLEScan = BLEDevice::getScan();
pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
pBLEScan->setActiveScan(true);
pBLEScan->start(30);
} // 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(*pServerAddress)) {
Serial.println("We are now connected to the BLE Server.");
connected = true;
} 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) {
//Serial.println(pRemoteCharacteristic->readUInt8());
String newValue = "Time since boot: " + String(millis()/1000);
//Serial.println("Setting new characteristic value to \"" + newValue + "\"");
//Serial.println(pRemoteCharacteristic->toString().c_str());
// Set the characteristic's value to be the array of bytes that is actually a string.
//pRemoteCharacteristic->writeValue(newValue.c_str(), newValue.length()); //did not want to mix up values
}
delay(1000); // Delay a second between loops.
} // End of loopThis is the log of the server:
Code: Select all
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:812
load:0x40078000,len:0
load:0x40078000,len:11392
entry 0x40078a9c
[D][BLEDevice.cpp:58] createServer(): >> createServer
[D][BLEServer.cpp:297] registerApp(): >> registerApp - 0
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_REG_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_REG_EVT
[D][BLEUtils.cpp:1755] dumpGattServerEvent(): [status: ESP_GATT_OK, app_id: 0]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_REG_EVT
[D][BLEServer.cpp:301] registerApp(): << registerApp
[D][BLEDevice.cpp:61] createServer(): << createServer
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEServer.cpp:76] createService(): >> createService - 6e400001-b5a3-f393-e0a9-e50e24dcca9e
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_CREATE_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_CREATE_EVT
[D][BLEUtils.cpp:1680] dumpGattServerEvent(): [status: ESP_GATT_OK, service_handle: 40 0x28, service_id: [uuid: 6e400001-b5a3-f393-e0a9-e50e24dcca9e, inst_id: 0]]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_CREATE_EVT
[D][BLEService.cpp:160] setHandle(): >> setHandle - Handle=0x28, service UUID=6e400001-b5a3-f393-e0a9-e50e24dcca9e)
[D][BLEService.cpp:166] setHandle(): << setHandle
[D][BLEService.cpp:89] executeCreate(): << executeCreate
[D][BLEServer.cpp:93] createService(): << createService
[D][BLEService.cpp:188] addCharacteristic(): >> addCharacteristic()
[D][BLEService.cpp:191] addCharacteristic(): Adding characteristic: uuid=6e400003-b5a3-f393-e0a9-e50e24dcca9e to service: UUID: 6e400001-b5a3-f393-e0a9-e50e24dcca9e, handle: 0x28
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEService.cpp:203] addCharacteristic(): << addCharacteristic()
[D][BLECharacteristic.cpp:71] addDescriptor(): >> addDescriptor(): Adding UUID: 00002902-0000-1000-8000-00805f9b34fb, handle: 0xffff to UUID: 6e400003-b5a3-f393-e0a9-e50e24dcca9e, handle: 0xffff Read Write Notify
[D][BLECharacteristic.cpp:73] addDescriptor(): << addDescriptor()
[D][BLEService.cpp:188] addCharacteristic(): >> addCharacteristic()
[D][BLEService.cpp:191] addCharacteristic(): Adding characteristic: uuid=6e400002-b5a3-f393-e0a9-e50e24dcca9e to service: UUID: 6e400001-b5a3-f393-e0a9-e50e24dcca9e, handle: 0x28
[D][BLEService.cpp:203] addCharacteristic(): << addCharacteristic()
[D][BLECharacteristic.cpp:557] setCallbacks(): >> setCallbacks: 0x3ffdb0bc
[D][BLECharacteristic.cpp:559] setCallbacks(): << setCallbacks
[D][BLEService.cpp:125] start(): >> start(): Starting service (esp_ble_gatts_start_service): UUID: 6e400001-b5a3-f393-e0a9-e50e24dcca9e, handle: 0x28
[D][BLECharacteristic.cpp:82] executeCreate(): >> executeCreate()
[D][BLECharacteristic.cpp:93] executeCreate(): Registering characteristic (esp_ble_gatts_add_char): uuid: 6e400003-b5a3-f393-e0a9-e50e24dcca9e, service: UUID: 6e400001-b5a3-f393-e0a9-e50e24dcca9e, handle: 0x28
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_ADD_CHAR_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_ADD_CHAR_EVT
[D][BLEUtils.cpp:1633] dumpGattServerEvent(): [status: ESP_GATT_OK, attr_handle: 42 0x2a, service_handle: 40 0x28, char_uuid: 6e400003-b5a3-f393-e0a9-e50e24dcca9e]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_ADD_CHAR_EVT
[D][BLECharacteristic.cpp:574] setHandle(): >> setHandle: handle=0x2a, characteristic uuid=6e400003-b5a3-f393-e0a9-e50e24dcca9e
[D][BLECharacteristic.cpp:576] setHandle(): << setHandle
[D][BLEDescriptor.cpp:63] executeCreate(): >> executeCreate(): UUID: 00002902-0000-1000-8000-00805f9b34fb, handle: 0xffff
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_ADD_CHAR_DESCR_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_ADD_CHAR_DESCR_EVT
[D][BLEUtils.cpp:1621] dumpGattServerEvent(): [status: ESP_GATT_OK, attr_handle: 43 0x2b, service_handle: 40 0x28, char_uuid: 00002902-0000-1000-8000-00805f9b34fb]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_ADD_CHAR_DESCR_EVT
[D][BLEDescriptor.cpp:275] setHandle(): >> setHandle(0x2b): Setting descriptor handle to be 0x2b
[D][BLEDescriptor.cpp:277] setHandle(): << setHandle()
[D][BLEDescriptor.cpp:87] executeCreate(): << executeCreate
[D][BLECharacteristic.cpp:134] executeCreate(): << executeCreate
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLECharacteristic.cpp:82] executeCreate(): >> executeCreate()
[D][BLECharacteristic.cpp:93] executeCreate(): Registering characteristic (esp_ble_gatts_add_char): uuid: 6e400002-b5a3-f393-e0a9-e50e24dcca9e, service: UUID: 6e400001-b5a3-f393-e0a9-e50e24dcca9e, handle: 0x28
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_ADD_CHAR_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_ADD_CHAR_EVT
[D][BLEUtils.cpp:1633] dumpGattServerEvent(): [status: ESP_GATT_OK, attr_handle: 45 0x2d, service_handle: 40 0x28, char_uuid: 6e400002-b5a3-f393-e0a9-e50e24dcca9e]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_ADD_CHAR_EVT
[D][BLECharacteristic.cpp:574] setHandle(): >> setHandle: handle=0x2d, characteristic uuid=6e400002-b5a3-f393-e0a9-e50e24dcca9e
[D][BLECharacteristic.cpp:576] setHandle(): << setHandle
[D][BLECharacteristic.cpp:134] executeCreate(): << executeCreate
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_START_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_START_EVT
[D][BLEUtils.cpp:1769] dumpGattServerEvent(): [status: ESP_GATT_OK, service_handle: 0x28]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_START_EVT
[D][BLEService.cpp:151] start(): << start()
[D][BLEAdvertising.cpp:86] start(): >> start
[D][BLEAdvertising.cpp:98] start(): - advertising service: 6e400001-b5a3-f393-e0a9-e50e24dcca9e
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEAdvertising.cpp:137] start(): << start
[D][BLEUtils.cpp:1067] dumpGapEvent(): Received a GAP event: ESP_GAP_BLE_ADV_DATA_SET_COMPLETE_EVT
6e400001-b5a3-f393-e0a9-e50e24dcca9e[D][BLEUtils.cpp:1075] dumpGapEvent(): [status: 0]
[D][BLEServer.cpp:134] handleGAPEvent(): BLEServer ... handling GAP event!
Waiting a client connection to notify...
[D][BLEUtils.cpp:1067] dumpGapEvent(): Received a GAP event: ESP_GAP_BLE_SCAN_RSP_DATA_SET_COMPLETE_EVT
[D][BLEUtils.cpp:1261] dumpGapEvent(): [status: 0]
[D][BLEServer.cpp:134] handleGAPEvent(): BLEServer ... handling GAP event!
[D][BLEUtils.cpp:1067] dumpGapEvent(): Received a GAP event: ESP_GAP_BLE_ADV_START_COMPLETE_EVT
[D][BLEUtils.cpp:1099] dumpGapEvent(): [status: 0]
[D][BLEServer.cpp:134] handleGAPEvent(): BLEServer ... handling GAP event!
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_CONNECT_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_CONNECT_EVT
[D][BLEUtils.cpp:1671] dumpGattServerEvent(): [conn_id: 0, remote_bda: 30:ae:a4:24:d0:c6]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_CONNECT_EVT
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
*** Sent Value: 50 ***
[D][BLECharacteristic.cpp:629] setValue(): >> setValue: length=2, data=4869, characteristic UUID=6e400003-b5a3-f393-e0a9-e50e24dcca9e
[D][BLECharacteristic.cpp:636] setValue(): << setValue
[D][BLECharacteristic.cpp:490] notify(): >> notify: length: 2
[D][BLECharacteristic.cpp:531] notify(): << notify
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_CONF_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_CONF_EVT
[D][BLEUtils.cpp:1656] dumpGattServerEvent(): [status: ESP_GATT_OK, conn_id: 0x00]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_CONF_EVT
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_READ_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_READ_EVT
[D][BLEUtils.cpp:1741] dumpGattServerEvent(): [conn_id: 0, trans_id: 1, bda: 30:ae:a4:24:d0:c6, handle: 0x2a, is_long: 0, need_rsp:1]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_READ_EVT
[D][BLECharacteristic.cpp:324] handleGATTServerEvent(): - Testing: 0x2a == 0x2a
[D][BLECharacteristic.cpp:352] handleGATTServerEvent(): Sending a response (esp_ble_gatts_send_response)
[D][BLECharacteristic.cpp:387] handleGATTServerEvent(): - Data: length=2, data=4869, offset=0
[D][BLECharacteristic.cpp:324] handleGATTServerEvent(): - Testing: 0x2a == 0x2d
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_RESPONSE_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_RESPONSE_EVT
[D][BLEUtils.cpp:1748] dumpGattServerEvent(): [status: ESP_GATT_OK, handle: 0x2a]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_RESPONSE_EVT
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_READ_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_READ_EVT
[D][BLEUtils.cpp:1741] dumpGattServerEvent(): [conn_id: 0, trans_id: 2, bda: 30:ae:a4:24:d0:c6, handle: 0x2a, is_long: 0, need_rsp:1]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_READ_EVT
[D][BLECharacteristic.cpp:324] handleGATTServerEvent(): - Testing: 0x2a == 0x2a
[D][BLECharacteristic.cpp:352] handleGATTServerEvent(): Sending a response (esp_ble_gatts_send_response)
[D][BLECharacteristic.cpp:387] handleGATTServerEvent(): - Data: length=2, data=4869, offset=0
[D][BLECharacteristic.cpp:324] handleGATTServerEvent(): - Testing: 0x2a == 0x2d
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_RESPONSE_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_RESPONSE_EVT
[D][BLEUtils.cpp:1748] dumpGattServerEvent(): [status: ESP_GATT_OK, handle: 0x2a]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_RESPONSE_EVT
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
*** Sent Value: 51 ***
[D][BLECharacteristic.cpp:629] setValue(): >> setValue: length=2, data=4869, characteristic UUID=6e400003-b5a3-f393-e0a9-e50e24dcca9e
[D][BLECharacteristic.cpp:636] setValue(): << setValue
[D][BLECharacteristic.cpp:490] notify(): >> notify: length: 2
[D][BLECharacteristic.cpp:531] notify(): << notify
[D][BLEDevice.cpp:80] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 3] ... ESP_GATTS_CONF_EVT
[D][BLEUtils.cpp:1611] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_CONF_EVT
[D][BLEUtils.cpp:1656] dumpGattServerEvent(): [status: ESP_GATT_OK, conn_id: 0x00]
[D][BLEServer.cpp:175] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_CONF_EVT
[D][BLEServer.cpp:287] handleGATTServerEvent(): << handleGATTServerEvent
*** Sent Value: 52 ***
...