Duplicating same data when interval is long

[comkuk]

Hello,

I'm writing codes which have 1 Hz sampling rates from ADC input below.

#define SAMPLE_LEVEL_MEAS_INTERVAL     APP_TIMER_TICKS(1000, APP_TIMER_PRESCALER)

Based on my observation, the sampling rates of ADC is correct but a problem is I'm receiving BLE data at around 15 ms, which means I receive 66 - 67 of same data before the data point is changed.

Does anyone have any idea why it happens?

[comkuk]

Thank you, Terje, for your answer. I did change the connection intervals as 500 ms for min_conn_interval and 1000 ms for max_conn_interval and now I'm seeing the data repeats only two times. How can I make BLE data sent at the same sampling rates I define?