nRF51822 BLE UART latency

RE: nRF51822 BLE UART latency

peetonn — Wed, 05 Aug 2015 07:24:43 GMT

hah! it seems that changing this '#define MIN_CONN_INTERVAL MSEC_TO_UNITS(500, UNIT_1_25_MS)
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(1000, UNIT_1_25_MS) ' to this \#define MIN_CONN_INTERVAL MSEC_TO_UNITS(24, UNIT_1_25_MS) \#define MAX_CONN_INTERVAL MSEC_TO_UNITS(48, UNIT_1_25_MS) helped! i don't see any lag anymore! would it be the correct way to solve it? these defines are used in initializing ble_gap_conn_params_t structure: gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL; gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;

RE: nRF51822 BLE UART latency

peetonn — Wed, 05 Aug 2015 07:17:01 GMT

yes, I've implemented central and peripheral. For peripheral, I have standard values: #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000, APP_TIMER_PRESCALER) do you think this might be the problem?

RE: nRF51822 BLE UART latency

Anders Strand — Tue, 04 Aug 2015 08:47:54 GMT

Hi. The first thing i would look at is your connection intervals. These intervals determine how often your central and peripheral communicate. If it is too long, the packets will heap up on the iOS side (depending on app/iOS implementation). Did you create both the LED peripheral as well as the iOS app?