ESP32 Arduino WiFi + Eddystone beacon
Posted: Thu Mar 21, 2019 5:36 am
I'm designing a device with with Wi-Fi, EEPROM, GPIO functions, and also trying to make the device advertise an Eddystone URL. After I added BLEDevice, I faced Sketch too big issue. To solve that issue, I changed the default partition to increase the program memory area. I also tried selecting partition scheme "No Ota (Large APP)", the sketch size issue got solved. But the advertise data is not correct, the device advertises something else.
Attached the screenshot of the raw data captured using nRF Connect APP.
Here is the BLE (Eddystone) Initialization code:
The debug log seems to be saying that the advertisement data set is completed.
Debug log:
Attached the screenshot of the raw data captured using nRF Connect APP.
Here is the BLE (Eddystone) Initialization code:
Code: Select all
BLEAdvertising *pAdvertising;
String product_url = "bit.ly/Brizo64a";
/*****************************************************************************
Initialize Bluetooth Low energy for Eddystone
*****************************************************************************/
void BLE_Init() {
char beacon_data[36];
uint16_t beaconUUID = 0xFFAA; // UUID for Eddystone Service
int url_length;
int count;
// Create BLE device
BLEDevice::init("UniShelf");
// Create BLE Server
BLEServer *pServer = BLEDevice::createServer();
pAdvertising = pServer->getAdvertising();
//setBeacon();
BLEAdvertisementData oAdvertisementData = BLEAdvertisementData();
oAdvertisementData.setFlags(0x06); // GENERAL_DISK_MODE 0x02 | BR_EDR_NOT_SUPPORTED 0x04
oAdvertisementData.setCompleteServices(BLEUUID(beaconUUID));
//beacon_data[0] = 0x20; // Eddystone Frame Type (Unencrypted Eddystone - TLM)
beacon_data[0] = 0x02; // Length
beacon_data[1] = 0x01; //
beacon_data[2] = 0x06; //
beacon_data[3] = 0x03; // Length
beacon_data[4] = 0x03; // Flag - Complete list of 16-bit Service UUIDs data type value
beacon_data[5] = 0xAA; // 16bit Eddystone UUID
beacon_data[6] = 0xFE; // ...
url_length = product_url.length();
beacon_data[7] = url_length+6; // Length
beacon_data[8] = 0x16; // Frame Type - Service Data
beacon_data[9] = 0xAA; // Eddystone
beacon_data[10] = 0xFE; //
beacon_data[11] = 0x10; // Frame Type - URL
beacon_data[12] = 0x00; // Tx power 4dBm?
beacon_data[13] = 0x03; // URL Scheme Prefix - https://
for(count=0; count<url_length; count++) {
beacon_data[14+count] = product_url.charAt(count);
}
beacon_data[14+count] = 0xFF;
#ifdef DEBUG
Serial.print("Beacon Data: ");
for(count=0; count<url_length+15; count++) {
if(beacon_data[count] < 16){
Serial.print('0');
}
Serial.print(beacon_data[count], HEX);
Serial.print(' ');
}
Serial.println();
#endif
oAdvertisementData.setServiceData(BLEUUID(beaconUUID), std::string(beacon_data, url_length+15));
#ifdef DEBUG
Serial.println("Service Data set!");
#endif
pAdvertising->setScanResponseData(oAdvertisementData);
#ifdef DEBUG
Serial.println("Scan response set!");
#endif
// Start advertising
pAdvertising->start();
#ifdef DEBUG
Serial.println("Advertising started...");
#endif
delay(5000);
}Debug log:
Code: Select all
[D][BLEDevice.cpp:82] createServer(): >> createServer
[D][BLEServer.cpp:290] registerApp(): >> registerApp - 0
[D][FreeRTOS.cpp:165] take(): Semaphore taking: name: RegisterAppEvt (0x3ffe461c), owner: <N/A> for registerApp
[D][FreeRTOS.cpp:174] take(): Semaphore taken: name: RegisterAppEvt (0x3ffe461c), owner: registerApp
[V][FreeRTOS.cpp:70] wait(): >> wait: Semaphore waiting: name: RegisterAppEvt (0x3ffe461c), owner: registerApp for registerApp
[D][BLEDevice.cpp:108] gattServerEventHandler(): gattServerEventHandler [esp_gatt_if: 4] ... ESP_GATTS_REG_EVT
[V][BLEUtils.cpp:1519] dumpGattServerEvent(): GATT ServerEvent: ESP_GATTS_REG_EVT
[V][BLEUtils.cpp:1709] dumpGattServerEvent(): dumpGattServerEvent: *** NOT CODED ***
[D][BLEServer.cpp:153] handleGATTServerEvent(): >> handleGATTServerEvent: ESP_GATTS_REG_EVT
[V][FreeRTOS.cpp:120] give(): Semaphore giving: name: RegisterAppEvt (0x3ffe461c), owner: registerApp
[D][BLEServer.cpp:280] handleGATTServerEvent(): << handleGATTServerEvent
[V][FreeRTOS.cpp:86] wait(): << wait: Semaphore released: name: RegisterAppEvt (0x3ffe461c), owner: registerApp
[D][BLEServer.cpp:294] registerApp(): << registerApp
[D][BLEDevice.cpp:89] createServer(): << createServer
[I][BLEDevice.cpp:561] getAdvertising(): create advertising
[D][BLEDevice.cpp:563] getAdvertising(): get advertising
02 01 06 03 03 AA FE 15 16 AA FE 10 00 03 62 69 74 2E 6C 79 2F 42 72 69 7A 6F 36 34 61 FF
Service Data set!
[D][BLEAdvertising.cpp:169] setScanResponseData(): >> setScanResponseData
[D][BLEAdvertising.cpp:177] setScanResponseData(): << setScanResponseData
[V][BLEUtils.cpp:1038] dumpGapEvent(): Received a GAP event: ESP_GAP_BLE_SCAN_RSP_DATA_RAW_SET_COMPLETE_EVT
[V][BLEUtils.cpp:1253] dumpGapEvent(): *** dumpGapEvent: Logger not coded ***
[D][BLEAdvertising.cpp:186] start(): >> start: customAdvData: 0, customScanResponseData: 1
[D][BLEAdvertising.cpp:205] start(): - no services adverti[D][BLEAdvertising.cpp:205] start(): - no services advertised
[D][BLEAdvertising.cpp:479] handleGAPEvent(): handleGAPEvent [event no: 5]
[D][BLEAdvertising.cpp:246] start(): << start
[V][BLEUtils.cpp:1038] dumpGapEvent(): Received a GAP event: ESP_GAP_BLE_ADV_DATA_SET_COMPLETE_EVT
[V][BLEUtils.cpp:1253] dumpGapEvent(): *** dumpGapEvent: Logger not coded ***
[D][BLEDevice.cpp:563] getAdvertising(): get advertising
[D][BLEAdvertising.cpp:479] handleGAPEvent(): handleGAPEvent [event no: 0]
[V][BLEUtils.cpp:1038] dumpGapEvent(): Received a GAP event: ESP_GAP_BLE_ADV_START_COMPLETE_EVT
[V][BLEUtils.cpp:1253] dumpGapEvent(): *** dumpGapEvent: Logger not coded ***
[D][BLEDevice.cpp:563] getAdvertising(): get advertising
[D][BLEAdvertising.cpp:479] handleGAPEvent(): handleGAPEvent [event no: 6]