SudharsanK58 commented 1 year ago

Operating System

Windows 10

IDE version

Platform IO

Board

nRF52 Dev Kit

BSP version

Latest version of blefruit lib

Sketch

include

BLEDfu bledfu; // OTA DFU service BLEDis bledis; // device information BLEUart bleuart; // uart over ble BLEBas blebas; // battery

static void startAdv(void); static void connect_callback(uint16_t conn_handle); static void disconnect_callback(uint16_t conn_handle, uint8_t reason);

void setup() { Serial.begin(115200); while ( !Serial ) delay(10);

Serial.println("Bluefruit52 BLEUART Example"); Serial.println("---------------------------\n");

Bluefruit.autoConnLed(true);

Bluefruit.configPrphBandwidth(BANDWIDTH_MAX);

Bluefruit.begin(); Bluefruit.setTxPower(4); // Check bluefruit.h for supported values Bluefruit.setName("Bluefruit52"); Bluefruit.Periph.setConnectCallback(connect_callback); Bluefruit.Periph.setDisconnectCallback(disconnect_callback);

bledfu.begin();

bledis.setManufacturer("Adafruit Industries"); bledis.setModel("Bluefruit Feather52"); bledis.begin();

bleuart.begin();

blebas.begin(); blebas.write(100);

startAdv();

Serial.println("Please use Adafruit's Bluefruit LE app to connect in UART mode"); Serial.println("Once connected, enter character(s) that you wish to send"); }

void startAdv(void) { Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE); Bluefruit.Advertising.addTxPower();

Bluefruit.Advertising.addService(bleuart);

Bluefruit.ScanResponse.addName();

Bluefruit.Advertising.restartOnDisconnect(true); Bluefruit.Advertising.setInterval(32, 244); // in unit of 0.625 ms Bluefruit.Advertising.setFastTimeout(30); // number of seconds in fast mode Bluefruit.Advertising.start(0); // 0 = Don't stop advertising after n seconds
}

void loop() { while (Serial.available()) { delay(2);

uint8_t buf[64];
int count = Serial.readBytes(buf, sizeof(buf));
bleuart.write( buf, count );

}

while ( bleuart.available() ) { uint8_t ch; ch = (uint8_t) bleuart.read(); Serial.write(ch); } }

void connect_callback(uint16_t conn_handle) { BLEConnection* connection = Bluefruit.Connection(conn_handle);

char central_name[32] = { 0 }; connection->getPeerName(central_name, sizeof(central_name));

Serial.print("Connected to "); Serial.println(central_name); }

void disconnect_callback(uint16_t conn_handle, uint8_t reason) { (void) conn_handle; (void) reason;

Serial.println(); Serial.println("Disconnected"); }

What happened ?

Its a simple ble UART example. This codes receives UART data for android phones only. But not on IOS iphones why?

How to reproduce ?

1.Run this code on Platform IO or Arduino IDE. 2.Ble named "Bluefruit52" will be shown on UART app or NrF connect app. 3.Try to send data via UART or try to connect with iphone.

Debug Log

No response

Screenshots

No response

mhbkamaei commented 1 year ago

Since iOS 13.3 (?) devices with Legacy DFU that do not use bonding, but use direct advertising in DFU Bootloader mode cannot be updated anymore. The same applies to Android devices with latest security patches. The solution is to modify the bootlaoder on a device to use non-direct advertising, but in order to update devices that are already in production, older, not updated devices are required. Nothing can be done on the library side, as the iOS just stopped reporting such advertising packets.

https://github.com/NordicSemiconductor/IOS-DFU-Library/blob/main/documentation.md