Hi! I've got a nRF52 dev kit and I'm programming it with SDK 15 with Keil. When I send 3 consecutive BLE notifications (each notification is 4 bytes) to the Android app, the app reads the last notification 3 times.
I send the notifications in a loop like this (data is different in each iteration):
for (uint8_t i = 0; i < 3; i++)
{
err_code = ble_send(m_conn_handle, &m_abc, (uint8_t*)&data);
while (err_code != NRF_SUCCESS);
nrf_delay_ms(100);
}
WITHOUT the delay between sending the notifications, the Android app receives the same data that was last sent, 3 times. WITH the delay, the Android app receives all 3 notifications correctly. How can I make it work without delay?
In the Android app I use the Nordic Android BLE library and initialize my callback to receive notifications:
private final BleManagerGattCallback mGattCallback = new BleManagerGattCallback() {
@Override
protected void initialize() {
setNotificationCallback(mCharacteristic).with(mDataCallback);
}
}
mDataCallback implements DataReceivedCallback.
For the dev kit, BLE connection parametes are defined like this:
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) #define MAX_CONN_INTERVAL MSEC_TO_UNITS(30, UNIT_1_25_MS) #define SLAVE_LATENCY 0 #define CONN_SUP_TIMEOUT MSEC_TO_UNITS(1000, UNIT_10_MS)
Thanks for any help in advance!
