BLE client connect device

[thuanhai0203]

This is my code

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1. #include "BLEDevice.h"
2. //#include "BLEScan.h"
3.  
4. #define bleServerName "70001697"
5. // The remote service we wish to connect to.
6. static BLEUUID serviceUUID("6ECB2400-DC4C-40CC-A6E0-81E0DBDA54E5");
7. // The characteristic of the remote service we are interested in.
8. static BLEUUID    charUUID("6ECB2401-DC4C-40CC-A6E0-81E0DBDA54E5");
9.  
10. static boolean doConnect = false;
11. static boolean connected = false;
12. static boolean doScan = false;
13. static BLERemoteCharacteristic* pRemoteCharacteristic;
14. static BLEAdvertisedDevice* myDevice;
15. static BLEAddress *pServerAddress;
16.  
17. static void notifyCallback(
18.   BLERemoteCharacteristic* pBLERemoteCharacteristic,
19.   uint8_t* pData,
20.   size_t length,
21.   bool isNotify) {
22.     Serial.print("Notify callback for characteristic ");
23.     Serial.print(pBLERemoteCharacteristic->getUUID().toString().c_str());
24.     Serial.print(" of data length ");
25.     Serial.println(length);
26.     Serial.print("data: ");
27.     Serial.println((char*)pData);
28. }
29.  
30. class MyClientCallback : public BLEClientCallbacks {
31.   void onConnect(BLEClient* pclient) {
32.   }
33.  
34.   void onDisconnect(BLEClient* pclient) {
35.     connected = false;
36.     Serial.println("onDisconnect");
37.   }
38. };
39.  
40. bool connectToServer() {
41.     Serial.print("Forming a connection to ");
42.     Serial.println(myDevice->getAddress().toString().c_str());
43.    
44.     BLEClient*  pClient  = BLEDevice::createClient();
45.     Serial.println(" - Created client");
46.  
47.     pClient->setClientCallbacks(new MyClientCallback());
48.  
49.     // Connect to the remove BLE Server.
50.     pClient->connect(myDevice);  // if you pass BLEAdvertisedDevice instead of address, it will be recognized type of peer device address (public or private)
51.     Serial.println(" - Connected to server");
52.  
53.     // Obtain a reference to the service we are after in the remote BLE server.
54.     BLERemoteService* pRemoteService = pClient->getService(serviceUUID);
55.     if (pRemoteService == nullptr) {
56.       Serial.print("Failed to find our service UUID: ");
57.       Serial.println(serviceUUID.toString().c_str());
58.       pClient->disconnect();
59.       return false;
60.     }
61.     Serial.println(" - Found our service");
62.  
63.  
64.     // Obtain a reference to the characteristic in the service of the remote BLE server.
65.     pRemoteCharacteristic = pRemoteService->getCharacteristic(charUUID);
66.     if (pRemoteCharacteristic == nullptr) {
67.       Serial.print("Failed to find our characteristic UUID: ");
68.       Serial.println(charUUID.toString().c_str());
69.       pClient->disconnect();
70.       return false;
71.     }
72.     Serial.println(" - Found our characteristic");
73.  
74.     // Read the value of the characteristic.
75.     if(pRemoteCharacteristic->canRead()) {
76.       std::string value = pRemoteCharacteristic->readValue();
77.       Serial.print("The characteristic value was: ");
78.       Serial.println(value.c_str());
79.     }
80.  
81.     if(pRemoteCharacteristic->canNotify())
82.       pRemoteCharacteristic->registerForNotify(notifyCallback);
83.  
84.     connected = true;
85. }
86. /**
87.  * Scan for BLE servers and find the first one that advertises the service we are looking for.
88.  */
89. class MyAdvertisedDeviceCallbacks: public BLEAdvertisedDeviceCallbacks {
90.   void onResult(BLEAdvertisedDevice advertisedDevice) {
91.     Serial.printf("Advertised Device: %s \n", advertisedDevice.toString().c_str());
92.     if (advertisedDevice.getName() == bleServerName) { //Check if the name of the advertiser matches
93.       advertisedDevice.getScan()->stop(); //Scan can be stopped, we found what we are looking for
94.       pServerAddress = new BLEAddress(advertisedDevice.getAddress()); //Address of advertiser is the one we need
95.       doConnect = true; //Set indicator, stating that we are ready to connect
96.       Serial.println("Device found. Connecting!");
97.     }
98.     else doScan = true;
99.   }
100. };
101.  
102.  
103. void setup() {
104.   Serial.begin(115200);
105.   Serial.println("Starting Arduino BLE Client application...");
106.   BLEDevice::init("");
107.  
108.   // Retrieve a Scanner and set the callback we want to use to be informed when we
109.   // have detected a new device.  Specify that we want active scanning and start the
110.   // scan to run for 5 seconds.
111.   BLEScan* pBLEScan = BLEDevice::getScan();
112.   pBLEScan->setAdvertisedDeviceCallbacks(new MyAdvertisedDeviceCallbacks());
113.   pBLEScan->setInterval(1349);
114.   pBLEScan->setWindow(449);
115.   pBLEScan->setActiveScan(true);
116.   pBLEScan->start(2, false);
117. } // End of setup.
118.  
119.  
120. // This is the Arduino main loop function.
121. void loop() {
122.  
123.   // If the flag "doConnect" is true then we have scanned for and found the desired
124.   // BLE Server with which we wish to connect.  Now we connect to it.  Once we are
125.   // connected we set the connected flag to be true.
126.   if (doConnect == true) {
127.     if (connectToServer()) {
128.       Serial.println("We are now connected to the BLE Server.");
129.     } else {
130.       Serial.println("We have failed to connect to the server; there is nothin more we will do.");
131.     }
132.     doConnect = false;
133.   }
134.  
135.   // If we are connected to a peer BLE Server, update the characteristic each time we are reached
136.   // with the current time since boot.
137.  
138.   if(doScan)
139.   {
140.     BLEDevice::getScan()->start(0);  // this is just eample to start scan after disconnect, most likely there is better way to do it in arduino
141.   }
142.  
143.   delay(2000); // Delay a second between loops.
144. } // End of loop

GeSHi © Codebox Plus Extension

But esp32 constant resets

Code: Select all

15:08:52.749 -> Forming a connection to Guru Meditation Error: Core  1 panic'ed (LoadProhibited). Exception was unhandled.
15:08:52.749 -> Core 1 register dump:
15:08:52.749 -> PC      : 0x40091c74  PS      : 0x00060530  A0      : 0x800d2270  A1      : 0x3ffc87f0  
15:08:52.796 -> A2      : 0x3ffc880a  A3      : 0x00000007  A4      : 0x00000006  A5      : 0x3ffc880a  
15:08:52.796 -> A6      : 0x00060320  A7      : 0x00000000  A8      : 0x800da201  A9      : 0x3ffc87d0  
15:08:52.796 -> A10     : 0x00000018  A11     : 0x3f4001c7  A12     : 0x00000018  A13     : 0x0000ff00  
15:08:52.796 -> A14     : 0x00ff0000  A15     : 0xff000000  SAR     : 0x00000018  EXCCAUSE: 0x0000001c  
15:08:52.796 -> EXCVADDR: 0x00000007  LBEG    : 0x40092ead  LEND    : 0x40092ebd  LCOUNT  : 0xfffffff9  
15:08:52.796 -> 
15:08:52.796 -> ELF file SHA256: 0000000000000000
15:08:52.843 -> 
15:08:52.843 -> Backtrace: 0x40091c74:0x3ffc87f0 0x400d226d:0x3ffc8800 0x400d1a62:0x3ffc8830 0x400d1d66:0x3ffc8880 0x400da7e4:0x3ffc88c0 0x40094ce2:0x3ffc88e0
15:08:52.843 -> 
15:08:52.843 -> Rebooting...

[ESP_Sprite]

Can you decode that backtrace? It should lead you to where the crash happens.